Archive | Volcanoes

Treaty Gives Maori 11 Volcanic Cones

AUCKLAND, New Zealand, Feb. 12 (UPI) — The New Zealand government and leaders of the Maori people signed a treaty Friday giving the indigenous tribe ownership of 11 volcanic cones in Auckland.

Other treaties still being negotiated could transfer ownership of the land under two prisons, The New Zealand Herald reports. Te Warena Taua, a spokesman for a group claiming one of the prison sites, said the Maori could be landlords of Paremoremo Prison.

“Whether there is a prison there or not … it is crown land and it is subject to our claim,” he said.

One of the cones, named One Tree Hill, had been bare for almost a decade, TVNZ reports. In 2000, Mike Smith, a Maori activist, cut down the 125-year-old Monterey pine that gave the hill its name, and the Auckland City Council agreed nothing would be planted there until the land claims were settled.

Mark Bowater, parks manager for the council, said the current plan is to plant nine trees on the hill. He said at least some are likely to die and the hill could end up with a single dominant survivor.

Copyright 2010 United Press International, Inc. (UPI). Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI’s prior written consent.

Posted in Volcanoes0 Comments

Mayon Volcano Eruption Expected by Scientists

MANILA, Philippines, Dec. 26 (UPI) — Scientists monitoring the Mayon volcano in the Philippines say a recent lull in activity could be the calm before the storm of a major eruption.

Vulcanologist Ed Laguerta said previous eruption records of Mount Mayon keeps officials from recommending a return home for more than 47,000 evacuees, the Manila Bulletin reported Saturday.

“We already learned our lesson in the past,” said Laguerta. “Every affected resident here knows that the silence of Mayon is not an assurance that they would be safe if they go back home.”

Along with previous records, scientists are relying on monitoring instruments placed around the volcano following days of rumblings and ash clouds.

There has been a significant increase in sulfur dioxide emissions, Laguerta said, from nearly 2,000 tons Thursday to nearly 9,000 tons a day.

“So we cannot say at this point that it is already safe for evacuees to go back home, we still have to monitor and monitor,” he said.

Copyright 2009 by United Press International

Posted in Volcanoes0 Comments

Volcano in Philippines Nearing Eruption

LEGAZPI CITY, Philippines, Dec. 18 (UPI) — The Mayon Volcano in the Albay Province of the Philippines is nearing possible eruption after days of volcanic activity, state volcanologists said Friday.

The Philippine Institute of Volcanology and Seismology said since Monday alone, Mount Mayon has endured 248 volcanic quakes and tremors, including 50 explosion-type events, the Philippines Bulletin reported.

“However, only seven (events) were observed during times of good visibility. These explosions produced dark gray to dark brown ash columns that reached a maximum height of up to 1,000 meters (3,280 feet) above the summit before drifting southwest,” institute director Renato Solidum said.

Lava has already begun exiting the volcano during the recent activity and lava fragments have traveled nearly 2 ½ miles down Mayon’s slopes.

The Bulletin said as a precaution, the institute issued a relatively high unrest alert status for the volcano and recommended no human activities take place within the danger zone surrounding the volcano.

Copyright 2009 by United Press International

Posted in Visibility, Volcanoes0 Comments

Erupting Volcano Filmed in Deep Sea

FALMOUTH, Mass., Dec. 18 (UPI) — For the first time, video and still photographic images have captured a deep-sea volcano erupting molten lava, scientists in Massachusetts said.

Scientists used a remotely operated vehicle named Jason to capture the event nearly 4,000 feet below the surface of the Pacific Ocean near Fiji, Tonga and Samoa, the Woods Hole Oceanographic Institution in Falmouth, Mass., said in a release.

Scientists in a control van on a research ship guided Jason to within 10 feet of the erupting volcano to collect samples of rocks, hot spring waters and biological specimens, expedition leader Albert Collasius said.

“There were 15 exuberant scientists in the control van who all felt like they hit a home run,” Collasius said.

Through a fiber optic tether, Jason transmitted high-definition video of the eruption as it occurred during the first week of May. The video was shown publicly for the first time at this week’s meeting of the American Geophysical Union in San Francisco.

Copyright 2009 by United Press International

Posted in Aquatic Life, Land & Soil, Volcanoes0 Comments

Yellowstone Magma Plume Studied

SALT LAKE CITY, Dec. 15 (UPI) — University of Utah scientists say seismic images of the plumbing feeding the Yellowstone supervolcano show a magma plume much larger than previously thought.

Scientists say they’ve imaged a plume of hot and molten rock rising at an angle from the northwest at a depth of at least 410 miles, contradicting claims there is no deep plume, only shallow hot rock moving like slowly boiling soup.

A related University of Utah study used gravity measurements to indicate the banana-shaped magma chamber of hot and molten rock a few miles beneath Yellowstone is 20 percent larger than previously believed, so a future cataclysmic eruption could be even larger than projected.

The studies, led by Professor Robert Smith, suggest the same “hotspot” that feeds Yellowstone volcanism also triggered the Columbia River “flood basalts” that buried parts of Oregon, Washington state and Idaho with lava starting 17 million years ago.

“We have a clear image, using seismic waves from earthquakes, showing a mantle plume that extends from beneath Yellowstone,” Smith said, noting the plume angles downward 150 miles to the west-northwest of Yellowstone and reaches a depth of at least 410 miles,

The study, the Yellowstone Geodynamics Project, was conducted during 1999-2005, using an average of 160 temporary and permanent seismic stations.

The findings from the studies appear in the Journal of Volcanology and Geothermal Research.

Copyright 2009 by United Press International

Posted in Earthquakes, Geothermal, Volcanoes0 Comments

Volcanoes Played Role in Ancient Ice Age and Formation of Atlantic Ocean

COLUMBUS, Ohio, Oct. 28 (UPI) — U.S. scientists says volcanoes around what is now the Atlantic Ocean caused the start of an ice age approximately 450 million years ago.

Ohio State University researchers said the volcanoes first caused global warming by releasing massive amounts of carbon dioxide into the atmosphere. But when they stopped erupting, Earth’s climate was thrown off balance, and the ice age began.

Associate Professor Matthew Saltzman said that discovery underscores the importance of carbon in Earth’s climate today.

Previously, Saltzman and his team linked the same ice age to the rise of the Appalachian Mountains. As the exposed rock weathered, chemical reactions pulled carbon from Earth’s atmosphere, causing a global cooling that ultimately killed two-thirds of all species on the planet.

In the new study, the researchers determined giant volcanoes forming during the closing of the proto-Atlantic Ocean — known as the Iapetus Ocean — set the stage for the rise of the Appalachians and the ice age that followed.

“Our model shows that these Atlantic volcanoes were spewing carbon into the atmosphere at the same time the Appalachians were removing it,” Saltzman said. “For nearly 10 million years, the climate was at a stalemate. Then the eruptions abruptly stopped, and atmospheric carbon levels fell well below what they were in the time before volcanism. That kicked off the ice age.”

The study appears in the early online edition of the journal Geology.

Copyright 2009 by United Press International

Posted in Volcanoes0 Comments

Geothermal in Hawaii

It Isn’t Oil!

Geothermal energy: Clean, stable, always available

In 1881, King David Kalakaua had the bright idea of using Hawaii’s fiery volcanoes to produce electricity and light the streets. It took technology the next century to catch up with the visionary king.

On the Big Island of Hawaii, nearly 20 percent of the electricity we consume is produced naturally by tapping the Earth’s heat. It is firm, strong power that the island truly depends upon, enough to continually power 20,000 residences.

When the wind doesn’t blow and the sun doesn’t shine, heat from the Earth’s interior is always available.

Puna’s geothermal power station
delivers 30 megawatts of power,
with potential to deliver much more.
(Photo: Puna Geothermal Venture)

Puna Geothermal Venture, the only commercial geothermal facility in the state, has been generating sustainable electricity for the Big Island for 15 years.

Under a Power Purchase Agreement with Hawaii Electric Light Company, PGV sends all the electricity it produces—30 megawatts—to the utility. It could provide much more.

The slopes of Kilauea Volcano are the state’s best resource. The only other island with significant geothermal resources is Maui, but its potential is considerably less.

Geothermal electricity:

  • Accounts for 30 percent of the state’s renewable energy—more than wind and solar combined
  • Saves 144,000 barrels of oil a year—more than 1.8 million barrels since 1993
  • Diversifies Hawai‘i’s energy sources
  • Means a much cleaner environment
  • Creates jobs and other economic benefit
  • Is a clean, stable, renewable source of power
  • And . . . it’s local!
  • Puna Geothermal Venture invested heavily in new equipment and technologies to get where it is today. State-of-the-art equipment is used to drill wells deep into volcanic reservoirs—a mile or more—and bring up hot fluid and steam. The steam drives turbines that generate electricity.

    Geothermal is also ‘green’: No oil or other fossil fuel is used in the operation.

    The plant has near “zero” emissions because the brine and gases that are left over are injected back into the Earth, well below the water table, through another set of wells called re-injection wells.

    This is called a binary or closed-loop circulation system, meaning that no excess gases or fluids reach the open air. It is one of the most advanced methods for producing geothermal energy. All PGV wells are this type.

    Other uses are possible besides generating electricity. Geothermal could contribute to the manufacture of other technologies, such as hydrogen fuel cells. It could also provide direct heat applications such as drying fruit and lumber, greenhouse propagation and aquaculture projects—even heating buildings.

    And there are economic benefits. Puna Geothermal Venture has 30 full-time employees and various other contractors. Many live in Puna District.

    PGV seeks to be a good neighbor, keeping the community informed of its activities via newsletter, a 24-hour response line and online information.

    Geothermal energy is the backbone of renewable energy resources in Hawaii. As the electricity demands grow, Puna Geothermal Venture stands ready to expand the project to meet the needs of the community.

    Tours of the facility, for groups or individuals, are available but must be booked in advance. Call (808) 965-6233.

    Posted in Art, Buildings, Electricity, Energy, Energy & Fuels, Fuel Cells, Geothermal, Hydrogen, Other, Science, Space, & Technology, Solar, Volcanoes, Wind6 Comments

    Nakheel-Planting Islands

    Modern technology is evolving at a frightening speed and ambitious scientists are beginning to realize that anything is possible. Less than a century ago, if you’d told anyone that people will travel to the moon, you would have found yourself heading to the nearest psychiatrist, no matter how calmly you relayed that information. Claims of talking to someone on a miniature phone, driving around in a horseless cart, building skyscrapers or seeing moving pictures in a box will have harbored the same results. With todays technology, however, even the most phenomenal natural process can be replicated and according to some, improved.

    Volcanoes have been responsible for spewing up islands (formed from massive amounts of magma) since the beginning of time. It is a challenge imagining anything more powerful than an erupting mountain. However, a now infamous United Emirates Development company-Nakheel-had decided to take on the challenge of creating huge man made islands off the Dubai coastline-without any volcanic help.

    Cities have been carved out of mountains and forests, it was only a matter of time before we saw islands erected in the ocean. The first of Nakheel’s projects was the Palm Jumeirah, launched in 2001, with more islands currently being added. Palm Jumeirah is already home to 500 families and contains malls, hotels, resorts, schools and parks. Leaving this sanctuary is unnecessary since it provides everything a family would need to live comfortably. According to the Nakheel website: “ When complete, projects such as the Palm Trilogy, the World and Waterfront will add more than 600 miles of beachfront to the Dubai coastline and cover over 2 billion sq ft.”

    The idea of building islands is catching on: Phuket, Thailand is planning to build Zoran, a man made island specifically designed to cater to super yachts. Spain has proposed a Marina development near Gibraltar, while Qatar has already started building “The Pearl” off its coast. International Listings shows the top 10 man made islands in greater detail.

    With the ability to create something of such proportions comes an environmental responsibility. Smaller islands have been built in the past, such as Florida’s Venetian Islands built during the 1920s. These islands, built to house more luxurius real estate, connect to the causway that runs from Miami to Miami beach.

    Dubai thrives on tourism and as the fastest growing city in the world, is always adding real estate. The addition of 60km per 1km of coastline gives tourists added incentives to visit the country and enjoy the warm waters. Pouring billions of tons of sand onto the ocean floor does not sound like it is doing the ocean ecosystem any favors, even though Nakheel company representatives claim that the corals in the area where mostly dead and with minimal wildlife. This is arguable, especially with the water now murky from the silt, but in Nakheel’s defense, they plan on creating artificial coral habitats, the sand will eventually settle, while the areas between the developed islands have already proven to be ideal habitats for species of sea grasses. Smaller remote islands will be specially created for nesting sea turtles. It is important to note that turtles tend to nest in uninhabited areas making Dubai’s mainland beaches inhospitable to the species. It is in the developers’ best interest to create the ideal habitats for the local wildlife since snorkeling with dolphins, turtles and fish amongst coral reefs and sea grasses adds to the appeal of living on an island.

    Looking at the Dubai coast from space, the expansive swirls of land and palm shaped islands seem out of place. It will be interesting to see whether oceanic wildlife will benefit from the expansion, especially with oceanic experts and conservation biologists giving advice to the development team.

    Posted in Conservation, Fish, Homes & Buildings, Science, Space, & Technology, Volcanoes0 Comments

    Reforesting the Tropics

    Monkey Jumping in Rainforest Canopy
    The face of the forest – a flying monkey
    soars through the canopy.

    Editor’s Note: By the mid-1990′s, thanks to tireless efforts of groups such as the Rainforest Action Network, the World Wildlife Fund, and countless others, headway was being made in the battle to reverse tropical deforestation. But that was then. About ten years ago, starting in Europe, enthusiasm for biofuel began to grow, and this enthusiasm quickly spread to the tropics where entrepreneurs began to raze the forests to grow oil palms and sugar cane. The momentum picked up as global warming alarm somehow translated itself into the notion that biofuel was better than petroleum – with most of the well-intentioned proponents of this notion completely unaware of the havoc they were encouraging in the tropics.

    Today where the timber barons have been slowed if not stopped, the biofuel barons are rampaging unchecked, and global warming concerns have left mute the organizations that should have been fighting this new cause for deforestation with the same vigor they fought the old. Even the figures are hard to find – we have checked with press officers for these groups and they claim there is no way to differentiate between deforestation for timber, for cattle ranches, or for biofuel.

    World production figures for biofuel tell another story. Biofuel, primarily ethanol and biodiesel, is expected to reach nearly 100 billion barrels per year by 2020. At 5,000 barrels per square mile per year – which is a very good yield – that is nearly 500,000 square miles of land, and most of this land is going to be where tropical rainforests once stood. Right now, less than 3.0 million square miles of tropical rainforest remains, down from nearly 8.0 million 150 years ago. We can’t afford to lose any more.

    Tropical deforestation not only causes loss of wildlife habitat, biodiversity, and soil erosion. Deforestation, especially in the tropics, also causes local and regional droughts. There is evidence that tropical deforestation disrupts the monsoon cycle, which could spread drought and extreme weather throughout the world. There is even a growing concern among climatologists that tropical deforestation may be a much bigger factor than industrial CO2 emissions in any alleged climate change we are experiencing.

    This is why stories such as this one, by Steve and Debbie Legg in Costa Rica, are encouraging and can serve as a model for other people and other nations. Using the sustainable harvests from newly planted forests to fund additional reforesting is a business model that encourages reforestation instead of deforestation, and can be an alternative to biofueled deforestation. – Ed “Redwood” Ring

    Costa Rican Resort Raising Funds for Reforestation
    by Steve & Debbie Legg, June 20, 2007

    The creation of a thousand forests is in one acorn…..

    - Ralph Waldo Emerson

    That simple Emerson quotation is premise of the reforestation program developed by Steve and Debbie Legg owners of Leaves and Lizards Arenal Volcano Cabin Retreat.

    Clear Cut Rainforest in Peru
    This devastating clear cut in Peru is
    an example of how the trouble begins.

    Just over a year ago, the Legg’s purchased a 26 acre dairy farm in Monterrey, Costa Rica. They built 3 cabins and opened to guests in January 2007. A vacation at Leaves and Lizards is an ecological and cultural experience. Guests may learn about the Meso-American Biological Corridor, the consequences of deforestation, spend the day with a Costa Rica family, become informed about the circle of life in the rainforest by their expert guides and eat food cooked with methane gas produced from the manure of their pigs and cows. Many of the guests that have had the pleasure of staying at Leaves and Lizards inquire about reforesting opportunities. Some have even purchased farms in need of reforesting. Others just want to do something to help reverse deforestation.

    Proper reforestation takes planning and follow through. These are the steps necessary for a successful reforestation plan:

    1 – Clean-up and soil preparation; if the farm has natural grass, clean-up is done once before planting. If the farm has exotic grasses like Brazilian or Gigante, it will take several clean-ups. These invasive grasses have been planted as pasture grass on cattle farms. They choke out and kill baby trees or other native grasses and plants.

    2 – Designing the new forest, ordering and careful transport of trees to the planting location. The design includes a variety of native trees. Teak, not native to Costa Rica, is commonly used as the pioneer forest. It grows rapidly, has large leaves that provide shade that the native trees need to grow. The teak can be harvested later to provide additional funding for future projects.

    3 – Making sticks for tree supports, digging holes, planting and organic fertilizing of trees. In the San Carlos area of Costa Rica tree planting season is in May and November. These are the rainiest months.

    4 – Eliminating weed competition and pruning; once a month for the next 24 months.
    It is possible to just let the land go back to “back to nature,” however, that takes longer and the new forest will have less biodiversity.

    The endpoint of thoughtless and rampant deforestation
    is shown in this photo of the Malagasy Republic, where
    erosion has claimed entire mountainsides.

    Biodiversity is short for Biological + Diversity, defined as the number of organisms in an ecosystem, region or environment. Rainforests are highly biodiverse; they cover only about 2% of the land mass on the earth, but contain 50% of all life on the planet. In 2.5 acres of primary rainforest there may be as many as 480 different species of trees. Brazil has the highest level of biodiversity in the world with 59,851 known different species of plants and animals. Sadly, they also have the world’s highest deforestation rate. Brazil is responsible for 27 % of the earth’s yearly deforestation. The earth suffers 80,000 acres of deforestation daily!

    A good reforestation plan includes ways for the new forest to support itself. For example, two trees are growing side by side, but in nature only one of those trees will reach old age, the other less dominate one will eventually be crowded out by the larger tree, the smaller tree can be harvested and the wood used to provide funding for the farm up keep, and further reforestation projects. Another tree is planted in its place. This is growing what Fred Morgan at Finca Leola ( calls a perpetual forest.

    A society grows great when old men plant trees whose shade they know they shall never sit in. – Greek Proverb

    The reforestation project at Leaves and Lizards ( offers people a chance to buy trees for reforestation as a gift, memorial or as part of a vacation package. One package gives the supporter the opportunity to plant and care for the baby trees. Supporters receive yearly photographs, documenting the growth of the trees they sponsored. The Legg’s work with Hector Ramirez from Reforest Costa Rica ( Hector’s knowledge and expertise of the local flora and fauna, as well as the connections he has in the community, prove to make this program a great success. Local farmers trust him and he is educating farmers about the need to protect their remaining forests and reforest to protect water sources.

    As an ecologically and socially responsible resort, community involvement is the philosophy of Leaves and Lizards. Monterrey is a tiny, close knit community, perched in the mountains above La Fortuna. La Fortuna sits in the shadow of the Arenal Volcano and has experienced rapid growth as numerous tourists flock to the area hoping to get a glimpse of one of the most active volcanoes in the world. The community of Monterrey has watched Fortuna outgrow its resources and since the opening of Leaves and Lizards, Monterrey has looked to the Legg’s for guidance in planning for future tourism. Steve and Debbie believe tourism should be a support to the community, remain in the background and not take over the community. Local leaders are taking proactive measures to ensure the preservation and continuation of the quality of life in this tranquil hamlet. The first meeting of the “city association” took place in February 2007. The association facilitates community improvements including road repair, handling of garbage, recycling and water usage.

    Many of the tours offered at Leaves and Lizards promote rural tourism. Farmers and other locals show off their farms, waterfalls and forests to the guests at Leaves and Lizards. Residents of Monterrey have helped plant native trees and plants that produce fruit to attract wildlife to the resort for guests to enjoy.

    Funds raised by Leaves and Lizards will help pay for farmers and individuals who are buying land to reforest to plant trees. This program may indeed be the seed of a thousand forests.

    The tree which moves some to tears of joy is in the eyes of others only a green thing that stands in the way. Some see Nature all ridicule and deformity, and some scarce see Nature at all. But to the eyes of the man of imagination, Nature is Imagination itself. – William Blake, 1799, The Letters

    Email the Editor about this Article
    EcoWorld - Nature and Technology in Harmony

    Posted in Animals, Biodiversity, Causes, Drought, Organizations, Other, Philosophy, Recycling, Regional, Soil Erosion, Trees & Forestry, Volcanoes0 Comments

    Is there a Basis for Global Warming Alarm & Climate Catastrophe?

    Brayton Point Powerplant in Fall River, Massachusetts
    Brayton Point powerplant in Fall River, Massachusetts
    (Photo: Alexey Sergeev)

    Editor’s Note: There are several reasons we have decided to jump into the global warming debate. First of all, it apparently is no longer a debate – everything’s been decided – and that doesn’t feel right. Around the world, politicians and big businesses are now enthusiastically embracing the need to fight global warming. In order to curb CO2 emissions, we are on the verge of enacting sweeping regulations that will affect every industrial sector on earth.

    There’s nothing wrong with many of the side benefits. Hopefully while we regulate CO2, we won’t forget to also regulate carbon monoxide, lead, ozone, particulate matter, nitrogen dioxide, and sulfur dioxide. Hopefully while we regulate CO2, we will be spurred towards faster adoption of totally clean alternative energy, and hopefully as well, we will all achieve energy independence.

    Still, it feels like there hasn’t been enough willingness to carefully deliberate the science behind the scare. We have already poked at some of the assumptions underlying global warming theories, and found them wanting. Why isn’t deforestation, and changed land use, and the urban heat island effect, also held accountable for global warming? Why can’t reforestation absorb and reduce levels of carbon dioxide? After all, we’ve lost 40% of the world’s forests – of course atmospheric carbon dioxide levels are higher.

    We have looked at truly alarming articles regarding rising sea levels in our posts Antarctic Ice and Greenland’s Ice Cap, and while they present some sobering possibilities, upon scrutiny there wasn’t anything nearly as alarming as the mainstream media is telling us, over and over. And what about those intensifying storms, such as Hurricane Katrina? Our author here claims that as the earth warms, the temperature differential between the tropics and the polar regions diminishes, and storms decrease in intensity. So we have a lot of questions.

    Dr. Richard Lindzen, the Alfred P. Sloan Professor of Atmospheric Science at the Massachusetts Institute of Technology, in this presentation delivered less than a year ago at Yale University, and not previously published, has outlined in technical detail the reasons for his skepticism regarding global warming hysteria. Even Dr. Lindzen’s detractors acknowledge he is one of the most eminent atmospheric scientists in the world. In spite of being at times excoriated, Dr. Lindzen is sticking to his guns. We prefer to think this is courage, not opportunism. In any case, it is the arguments, not the individual, which must determine if we accept or reject a theory. Read on, and make up your own minds. – Ed “Redwood” Ring

    For the sensitive reader or listener, the language used in connection with the issue of Global Warming must frequently sound strange.

    Weather and climate catastrophes of all sorts are claimed to be what one expects from global warming, and global warming is uniquely associated with man’s activities. The reality of the threat of global warming is frequently attested to by reference to a scientific consensus:

    Tony Blair (1): “The overwhelming view of experts is that climate change, to a greater or lesser extent, is man-made, and, without action, will get worse.”

    Elizabeth Kolbert in the New Yorker (2): “All that the theory of global warming says is that if you increase the concentration of greenhouse gases in the atmosphere, you will also increase the earth’s average temperature. It’s indisputable that we have increased greenhouse-gas concentrations in the air as a result of human activity, and it’s also indisputable that over the last few decades average global temperatures have gone up.”

    Al Gore Portrait
    Al Gore – a passionate
    advocate of curbing
    CO2 emissions

    Given the alarm that surrounds the issue, such statements seem peculiarly inconclusive and irrelevant to the catastrophes cited. To be sure, these references are one-sided. They fail to note that there are many sources of climate change, and that profound climate change occurred many times both before and after man appeared on earth; given the ubiquity of climate change, it is implausible that all change is for the worse. Moreover, the coincidence of increasing CO2 and the small warming over the past century hardly establishes causality. Nevertheless, for the most part I do not personally disagree with the Consensus (though the absence of any quantitative considerations should be disturbing). Indeed, I know of no serious split, and suspect that the claim that there is opposition to this consensus amounts to no more than setting up a straw man to scoff at. However, I believe that people are being led astray by the suggestion this agreement constitutes support for alarm.

    Let us view the components that comprise this consensus a little more precisely while recognizing that there is, indeed, some legitimate controversy connected with specific aspects of even these items.

    1. The global mean surface temperature is always changing. Over the past 60 years, it has both decreased and increased. For the past century, it has probably increased by about 0.6 ±0.15 degrees Centigrade (C). That is to say, we have had some global mean warming.
    2. CO2 is a greenhouse gas and its increase should contribute to warming. It is, in fact, increasing, and a doubling would increase the greenhouse effect (mainly due to water vapor and clouds) by about 2%.
    3. There is good evidence that man has been responsible for the recent increase in CO2, though climate itself (as well as other natural phenomena) can also cause changes in CO2.

    In some respects, these three pillars of consensus are relatively trivial. Remaining completely open is the question of whether there is any reason to consider this basic agreement as being alarming. Relatedly, is there any objective basis for considering the approximate 0.6C increase in global mean surface temperature to be large or small regardless of its cause? The answer to both questions depends on whether 0.6C is larger or smaller than what we might have expected on the basis of models which have led to our concern. These models are generally called General Circulation Models (GCMs). We may, therefore, seek to determine how the current level of man made climate forcing compares with what we would have were CO2 to be doubled (a common reference level for GCM calculations).

    An Inconvenient Truth Book Cover
    An Inconvenient Truth, by Al Gore
    The most influential book in history?

    In terms of climate forcing, greenhouse gases added to the atmosphere through mans activities since the late 19th Century have already produced three-quarters of the radiative forcing that we expect from a doubling of CO2 (3).

    The main reasons for this are:

    1. CO2 is not the only anthropogenic greenhouse gas – others like methane also contribute; and
    2. The impact of CO2 is nonlinear in the sense that each added unit contributes less than its predecessor. For example, if doubling CO2 from its value in the late 19th Century (about 290 parts per million by volume or ppmv) to double this (i.e., 580 ppmv) causes a 2% increase in radiative forcing (4), then to obtain another 2% increase in radiative forcing we must increase CO2 by an additional 580 ppmv rather than by another 290 ppmv. At present, the concentration of CO2 is about 380 ppmv. The easiest way to understand this is to consider adding thin layers of paint to a pane of glass. The first layer cuts out much of the light, the next layer cuts out more, but subsequent layers do less and less because the painted pane is already essentially opaque.

    It should be stressed that we are interested in climate forcing, and not simply levels of CO2; the two are most certainly not linearly proportional.

    Essential to alarm is the fact that most current climate models predict a response to a doubling of CO2 of about 4C (which is much larger than what one expects the simple doubling of CO2 to produce: ie, about 1C). The reason for this is that in these models, the most important greenhouse substances, water vapor and clouds, act in such a way as to greatly amplify the response to anthropogenic greenhouse gases alone (ie, they act as what are called large positive feedbacks). However, as all assessments of the Intergovernmental Panel on Climate Change (IPCC) have stated (at least in the text – though not in the Summaries for Policymakers), the models simply fail to get clouds right. We know this because in official model intercomparisons, all models fail miserably to replicate observed distributions of cloud cover. Thus, the model predictions are critically dependent on features that we know must be wrong. In Figure 1 we see that treatment of clouds involves errors an order of magnitude greater than the forcing from a doubling of CO2 (5). While the IPCC allows for the possibility that the models get water vapor right, the intimate relation of water vapor to clouds makes such a conclusion implausible.

    Graph of Total Cloudiness by Latitude
    Figure 1. Each thin gray line shows an individual model’s hindcast of percentage
    cloud cover averaged by latitude. The black line shows the observed cloud cover

    Let me summarize the main points thus far:

    1. It is NOT the level of CO2 that is important, but rather the impact of man made greenhouse gases on climate.
    2. Although we are far from the benchmark of doubled CO2, climate forcing is already about 3/4 of what we expect from such a doubling.
    3. Even if we attribute all warming over the past century to man made greenhouse gases (which we have no basis for doing), the observed warming is only about 1/3-1/6 of what models project.

    We are logically led to two possibilities:

    1. Our models are greatly overestimating the sensitivity of climate to man made greenhouse gases, or
    2. The models are correct, but there is some unknown process that has cancelled most of the warming.

    Note that calling the unknown process “aerosols” does not change this statement since aerosols and their impact are unknown to a factor of ten or more; indeed, even the sign is in doubt.

    In arguing for climate alarmism, we are choosing the second possibility. Moreover, we are assuming that the unknown cancellation will soon cease. How is the second possibility supported given that it involves so many more assumptions than the first possibility?

    Graphs of Simulated Annual Global Mean Surface Temperatures
    Figure 2. Simulations of global mean temperature with various combinations of ‘forcing.’

    The IPCC Third Assessment Report (TAR) made use of a peculiar exercise in curve fitting using results from the Hadley Centre. It consists in three plots which are reproduced in Figure 2. In the first panel, we are shown an observed temperature record (without error bars), and the outputs of four model runs (using their coupled ocean-atmosphere model) with so-called natural forcing for the period 1860-2000. There is a small spread in the model runs (which presumably displays model uncertainty – it most assuredly does not represent natural internal variability). In any event, the models look roughly like the observations until the last 30 years. We are then shown a second diagram where the observed curve is reproduced and the four models are run with anthropogenic forcing. Here we see rough agreement over the last 30 years, and poorer agreement in the earlier period. Finally, we are shown the observations and the model runs with both natural and anthropogenic forcing, and, voila, there is rough agreement over the whole record. It should be noted that the models used had a relatively low sensitivity to a doubling of CO2 of about 2.5C.

    In order to know what to make of this exercise, one must know exactly what was done. The natural forcing consisted in volcanoes and solar variability. Prior to the Pinatubo eruption in 1991, the radiative impact of volcanoes was not well measured, and estimates vary by about a factor of 3. Solar forcing is essentially unknown. Thus, natural forcing is, in essence, adjustable. Anthropogenic forcing includes not only anthropogenic greenhouse gases, but also aerosols that act to cancel warming (in the Hadley Centre outputs, aerosols and other factors cancelled two thirds of the greenhouse forcing). Unfortunately, the properties of aerosols are largely unknown. In the present instance, therefore, aerosols constitute simply another adjustable parameter (indeed, both its magnitude and its time history are adjustable, and even its sign is in question).

    This was remarked upon in a recent paper in Science (Andersen, et al, 2003 (6)), wherein it was noted that the uncertainty was so great that estimating aerosol properties by tuning them to optimize agreement between models and observations (referred to as an inverse method) was probably as good as any other method, but that the use of such estimates to then test the models constituted a circular procedure. This is as strong a criticism of model procedures as is likely to be found in Science. The authors are all prominent in aerosol work. The first author is the most junior, and when it was pointed out that the article reflected negatively on model outputs, he vehemently denied any such intent. In the present example, the choice of models with relatively low sensitivity, allowed adjustments that were not so extreme.

    New uncertainties are always entering the aerosol picture. Some are quite bizarre. A recent article in Science (Jaenicke, 2005 (7)) even proposed a significant role to airborn dandruff. Other articles have been suggesting that the primary impact of aerosols is actually warming (Jacobson, 2001 (8), Chen and Penner, 2005 (9)). Of course this is the beauty of the global warming issue for many scientists. The issue deals with such small climate forcing and small temperature changes that it permits scientists to argue that everything and anything is important for climate.

    In brief, the defense of the models starts by assuming the model is correct. One then attributes differences between the model behavior in the absence of external forcing, and observed changes in ‘global mean temperature’ to external forcing. Next one introduces ‘natural’ forcing and tries to obtain a ‘best fit’ to observations. If, finally, one is able to remove remaining discrepancies by introducing ‘anthropogenic’ forcing, we assert that the attribution of part of the observed change to the greenhouse component of ‘anthropogenic’ forcing must be correct.

    Of course, model internal variability is not correct, and ‘anthropogenic’ forcing includes not only CO2 but also aerosols, and the latter are unknown to a factor of 10-20 (and perhaps even sign). Finally, we have little quantitative knowledge of ‘natural’ forcing so this too is adjustable. Recall that the Hadley Centre acknowledges that the “aerosols” canceled most of the forcing from CO2.

    Industrial Smokestacks and Smog
    Something like 100,000 quadrillion BTUs of
    energy are locked in remaining fossil fuels.
    There is no shortage, but is it safe to burn?
    (Photo: US EPA)

    Yet, the ‘argument’ I have just presented is the basis for all popular claims that scientists now ‘believe’ that man is responsible for much of the observed warming!

    It would appear that the current role of the scientist in the global warming issue is simply to defend the ‘possibility’ of ominous predictions so as to justify his ‘belief.’

    To be fair to the authors of Chapter 12 of the IPCC Third Scientific Assessment here is what they provided for the draft statement of the Policymakers Summary: From the body of evidence since IPCC (1996), we conclude that there has been a discernible human influence on global climate. Studies are beginning to separate the contributions to observed climate change attributable to individual external influences, both anthropogenic and natural. This work suggests that anthropogenic greenhouse gases are a substantial contributor to the observed warming, especially over the past 30 years. However, the accuracy of these estimates continues to be limited by uncertainties in estimates of internal variability, natural and anthropogenic forcing, and the climate response to external forcing.

    This statement is not too bad – especially the last sentence. To be sure, the model dependence of the results is not emphasized, but the statement is vastly more honest than what the Summary for Policymakers in the IPCC’s Third Assessment Report ultimately presented:

    In the light of new evidence and taking into account the remaining uncertainties, most of the observed warming over the last 50 years is likely to have been due to the increase in greenhouse gas concentrations.

    In point of fact, the impact of man remains indiscernible simply because the signal is too small compared to the natural noise. Claims that the current temperatures are ‘record breaking’ or ‘unprecedented’, however questionable or misleading, simply serve to obscure the fact that the observed warming is too small compared to what models suggest. Even the fact that the oceans’ heat capacity leads to a delay in the response of the surface does not alter this conclusion (especially since the Hadley Centre results are obtained with a coupled model).

    Moreover, the fact that we already have three quarters of the climate forcing expected from a doubling of CO2 means that if one truly believes the models, then we have long since passed the point where mitigation is a viable strategy. What remains is to maximize our ability to adapt. That the promotion of alarm does not follow from the science is clearly illustrated by the following example:

    According to any textbook on dynamic meteorology, one may reasonably conclude that in a warmer world, extratropical storminess and weather variability will actually decrease. The reasoning is as follows. Judging by historical climate change, changes are greater in high latitudes than in the tropics. Thus, in a warmer world, we would expect that the temperature difference between high and low latitudes would diminish. However, it is precisely this difference that gives rise to extratropical large-scale weather disturbances. Moreover, when in Boston on a winter day we experience unusual warmth, it is because the wind is blowing from the south. Similarly, when we experience unusual cold, it is generally because the wind is blowing from the north. The possible extent of these extremes is, not surprisingly, determined by how warm low latitudes are and how cold high latitudes are. Given that we expect that high latitudes will warm much more than low latitudes in a warmer climate, the difference is expected to diminish, leading to less variance.

    Nevertheless, we are told by advocates and the media that exactly the opposite is the case, and that, moreover, the models predict this (which, to their credit, they do not) and that the basic agreement discussed earlier signifies scientific agreement on this matter as well. Clearly more storms and greater extremes are regarded as more alarming than the opposite. Thus, the opposite of our current understanding is invoked in order to promote public concern. The crucial point here is that once the principle of consensus is accepted, agreement on anything is taken to infer agreement on everything advocates wish to claim.

    The reader may have noticed that I focused on extratropical storms in the above example. However, given the relatively heavy hurricane season we’ve had, the emphasis of late has been on tropical storms. Recent papers suggesting that in a warmer world, such storms may become more powerful (10), have been seized upon with alacrity by political activists. Needless to add, the articles seized upon have been extremely controversial, but more to the point, no such relation was uncovered for storms reaching land – only for those over water.

    At this point, it is doubtful that we are even dealing with a serious problem. If this is correct, then there is no policy addressing this non-problem that would be cost-effective. Even if we believe the problem to be serious, we have already reached the levels of climate forcing that have been claimed to be serious. However, when it comes to Kyoto, the situation is even worse. Here, there is widespread and even rigorous scientific agreement that complete adherence to the Kyoto Agreement would have no discernible impact on climate regardless of what one believes about climate. Thus, the theme of this meeting is, at least on this count, appropriate.

    What about the first possibility: namely that the models on which we are basing our alarm are much too sensitive? Not only is this the possibility that scientists would normally have preferred on the basis of Occam’s famous razor, but it is also a possibility for which there is substantial support (11). I will focus on one line of this evidence: tropical warming in the 90′s has been associated with much greater outgoing long wave radiation than models produce. This discrepancy points toward the absence of a strong negative feedback in current models.

    The discrepancy has been confirmed by at least four independent groups: at NASA’s Goddard Institute for Space Studies (Chen et al, 2002, DelGenio and Kovari, 2002 (12)), at NASA Langley (Wielicki et al, 2002, Lin et al, 2004 (13)), at SUNY Stony Brook (Cess and Udelhofen, 2003 (14)), and at the University of Miami (Clement and Soden, 2005 (15)).

    This discrepancy would normally have pointed to exaggerated model sensitivity. However, the preceding papers attempted to either attribute the discrepancy to circulation changes or to ‘unknown’ cloud properties – except for the last paper. Clement and Soden (2005) showed that changes in dynamics could not produce changes averaged over the tropics. They showed this using 4 separate models, but it had been shown theoretically by Chou and Lindzen (2004) (16). Clement and Soden also showed that the discrepancy could be resolved by allowing convective precipitation efficiency to increase with surface temperature. Such a dependence is at the heart of the iris effect which was first found by Lindzen, Chou and Hou (2001) (17), and was theoretically predicted by Sun and Lindzen (1993) (18). In LCH, we attempted to examine how tropical clouds responded to changing surface temperature, and found that existing satellite data was only marginally capable of dealing with this issue. The results, however, suggested that there were strong negative feedback — counter to what models suggest. It was moreover, easy to show that models in no way replicated the cloud behavior that was observed.

    It may turn out that the rigorous measurement of precipitation can be done with ground based radar. Ground based radar allows the almost continuous measurement of precipitation and the separation of convective precipitation from stratiform precipitation (albeit with remaining questions of accuracy). In the tropics, both types of precipitation originate in condensation within cumulus towers. However, condensation that does not form precipitation is carried aloft as ice which is detrained to form cirrus from which the condensate eventually falls as stratiform precipitation. Precipitation efficiency is given by the relation:


    Using data from Kwajalein Atoll in the western Pacific, we were able to study how e varies with sea surface temperature. In addition, the Kwajalein radar allows one to explicitly look at the area of stratiform rain per unit of convective mass flux.

    Graphs of Precipitation Efficiency versus Surface Temperature
    Figure 3. Left: Preciptation efficiency vs. surface temperature;
    Right: Cirrus area per unit convective activity vs. surface temperature.

    We see from Figure 3 that e increases about 7.1% per degree C increase in SST (compared with 7.5% estimated by Sun and Lindzen, 1993), and that this increase is associated with a decrease in normalized stratiform area of about 25% per degree C (which is a bit larger than what was estimated from space observations by Lindzen, Chou and Hou, 2001). If correct, this basically confirms the iris effect, and the fact that models have greatly exaggerated climate sensitivity because, in contrast to models, nature, itself, acts to limit rather than exaggerate the influence of added greenhouse gases.

    What would be the implication of these simple results?

    The primary implication would be that for over 25 years, we have based not only our worst case scenarios but even our best case scenarios on model exaggeration. This was already suggested by previous results, but the present result has the virtue of specifically identifying a basic and crucially relevant error. Under the circumstances, the main question we will be confronting is how long the momentum generated by this issue will prevent us from seeing that it has been an illusion based on model error. However, I am not altogether optimistic about this.

    Smokestacks at Mine
    What’s coming out – industrial
    smokestacks with GE Reuter-Stokes
    Stak-Tracker gas analyzers
    (Photo: NASA)

    The public discourse on global warming has little in common with the standards of scientific discourse. Rather, it is part of political discourse where comments are made to secure the political base and frighten the opposition rather than to illuminate issues.

    In political discourse, information is to be “spun” to reinforce pre-existing beliefs, and to discourage opposition. The chief example of the latter is the perpetual claim of universal scientific agreement. This claim was part of the media treatment of global cooling (in the 1970′s) and has been part of the treatment of global warming since 1988 (well before most climate change institutes were created). The consensus preceded the research.

    That media discourse on climate change is political rather than scientific should, in fact, come as no surprise. However, even scientific literature and institutions have become politicized. Some scientists issue meaningless remarks in what I believe to be the full expectation that the media and the environmental movement will provide the ‘spin.’ Since the societal response to alarm has, so far, been to increase scientific funding, there has been little reason for scientists to complain. Should scientists feel any guilt it is assuaged by two irresistible factors: The advocates define public virtue; and administrators are delighted with the growing grant overhead. The situation has been recognized since time immemorial. In Federalist Paper No. 79, Alexander Hamilton brooded about abuses that might arise from legislative tampering with judges’ salaries. “In the general course of human nature,” he wrote, “a power over a man’s subsistence amounts to a power over his will.” An indication of such an attitude occurred when, in 2003, the draft of the US National Climate Plan urged high priority for improving our knowledge of climate sensitivity (ie, in finding the answer). It appears that an NRC review panel was critical of this prioritization, urging prioritization instead for broader support for numerous groups to study the impacts of the putative warming. One is tempted to suggest that the NRC panel was more interested in spreading the wealth than in finding an answer.

    A second aspect of politicization of discourse specifically involves scientific literature. Articles challenging the claim of alarming response to anthropogenic greenhouse gases are met with unusually quick rebuttals. These rebuttals are usually published as independent papers rather than as correspondence concerning the original articles, the latter being the usual practice. When the usual practice is used, then the response of the original author(s) is published side by side with the critique. However, in the present situation, such responses are delayed by as much as a year. In my experience, criticisms do not reflect a good understanding of the original work. When the original authors’ responses finally appear, they are accompanied by another rebuttal that generally ignores the responses but repeats the criticism. This is clearly not a process conducive to scientific progress, but it is not clear that progress is what is desired. Rather, the mere existence of criticism entitles the environmental press to refer to the original result as ‘discredited,’ while the long delay of the response by the original authors permits these responses to be totally ignored.

    A final aspect of politicization is the explicit intimidation of scientists. Intimidation has mostly, but not exclusively, been used against those questioning alarmism. Victims of such intimidation generally remain silent. Congressional hearings have been used to pressure scientists who question the ‘consensus’. Scientists who views question alarm are pitted against carefully selected opponents. The clear intent is to discredit the ‘skeptical’ scientist from whom a ‘recantation’ is sought.

    The news media is frequently used as an instrument for this intimidation. A notable example in the early 1990′s was Ted Koppel’s Nightline program. He announced that Vice President Gore had asked him to find connections to unsavory interests of scientists questioning global warming alarm. Koppel, after editorializing on the inappropriateness of the request, proceeded to present a balanced exposure of the debate. Newspaper and magazine articles routinely proclaimed that scientists who differ with the consensus view are stooges of the fossil fuel industry. All of this would be bad enough, but the real source of intimidation was the fact that neither the American Meteorological Society nor the American Geophysical Society saw fit to object to any of this.

    These are not isolated examples. Before 1991, some of Europe’s most prominent climate experts were voicing significant doubts about climate alarm. Note that the issue has always concerned the basis for alarm rather than the question of whether there was warming (however small) or not. Only the most cynical propagandist could have anticipated that sentient human beings could be driven into panic by the mere existence of some warming. In any event, among these questioners were such distinguished individuals as Sir John Mason, former head of the UK Meteorological Office, and Secretary of the Royal Society, Prof. Hubert Lamb, Europe’s foremost climatologist and founder of the Climate Research Unit at East Anglia University, Dr. Henk Tennekes, Director of Research at the Royal Dutch Meteorological Institute, and Professor Aksel Wiin-Nielsen of the University of Copenhagen and former Director of the European Centre for Medium Range Weather Forecasting, and Secretary General of the World Meteorological Organization. All of these figures except Tennekes have disappeared from the public discourse. Lamb is now dead. Tennekes was dismissed from his position, and Wiin-Nielsen was tarred by Bert Bolin (the first head of the IPCC) as a tool of the coal industry. In Russia, a number of internationally recognized pioneers of climate science like K. Kondratyev (died in 2006) and Y. Izrael, continue to vocally oppose climate alarm, but Russian scientists eager for connections with the rest of Europe are much more reluctant to express such views.

    Not all such situations ended badly. When a senior Energy Department official, William Happer, was dismissed in 1993 after expressing questions about the scientific basis about global warming claims, the physics community was generally supportive and sympathetic (19). In another more bizarre case, an attempt was made to remove the name of Roger Revelle from an already published paper he coauthored with S. Fred Singer and Chauncy Starr, by claiming that Singer had cajoled an allegedly senile Roger Revelle into permitting himself to be so used. This paper discouraged hasty action on ill-understood warming. It should be noted that Revelle was the professor who Al Gore frequently cites as having introduced him to the horrors of global warming. In any event, Singer took the issue to court and won. His description of the case makes interesting reading (20).

    More recent is a controversy over a 1,000 year reconstruction of mean temperature purporting to show that the half degree (Centigrade) rise of the past century was unprecedented (21). Because of the extensive use of this work in the politics of global warming, Congressman Joe Barton demanded the analytical detail since the research was supported by US funds. Both the American Meteorological Society and the American Geophysical Union protested Barton’s request. One need not go into the merits of this controversy to see that this difference in the response of professional organizations sends a rather chilling message. Only the defenders of the orthodoxy will be defended against intimidation.

    I want to emphasize that the basic agreement frequently described as representing a global warming ‘consensus’ is entirely consistent with there being virtually no problem. Actual observations suggest that the sensitivity of the real climate is much less than found in computer models whose sensitivity depend on processes which are clearly misrepresented. Attempts to assess climate sensitivity by direct observation of cloud processes, and other means, point to a conclusion that doubling CO2 would lead to about 0.5C warming or less.

    Unfortunately, a significant part of the scientific community appears committed to the maintenance of the notion that alarm may be warranted. Alarm is felt to be essential to the maintenance of funding. The argument is no longer over whether the models are correct (they are not), but rather whether their results are at all possible. Alas, it is impossible to prove something is impossible. The global warming issue parts company with normative science at an early stage. A good indicator of this disconnect is widespread and rigorous scientific agreement that the Kyoto Agreement would have no discernible impact on climate. This clearly is of no importance to the thousands of negotiators, diplomats, regulators, general purpose bureaucrats and advocates whose livelihood is tied to climate alarmism.

    A rarely asked but important question is whether promoting alarmism is good for science? The situation may not be so remote from the impact of Lysenkoism on Soviet genetics. However, personally, I think the future will view the response of contemporary society to ‘global warming’ as simply another example of the appropriateness of the fable of the Emperor’s New Clothes. For the sake of the science, I hope that future arrives soon. In the mean time, we can continue to play our parts in this modern version of The Emperor’s New Clothes. Let us hope that our descendents will be amused rather than horrified.


    1 Economist, December 24, 2004 (back)

    2 New Yorker, April 25, 2005 (back)

    3 Myhre et al. (1998) Geophys. Res. Ltrs., 25, 2715-2718; Hansen, J., and M. Sato 2004. Greenhouse gas growth rates. Proc. Natl. Acad. Sci. 101, 16109-16114. (back)

    4 The term, forcing, in this paper, refers to the imbalance in radiative energy flux that would be produced by the addition of greenhouse gases. We will generally describe such forcing as either a percentage increase in the greenhouse effect, or as a flux with units of Watts per square meter. Such a flux acts to warm the earth. (back)

    5 Gates, W. L., J. Boyle, C. Covey, C. Dease, C. Doutriaux, R. Drach, M. Fiorino, P. Gleckler, J. Hnilo, S. Marlais, T. Phillips, G. Potter, B.D. Santer, K.R. Sperber, K. Taylor and D. Williams, 1999: An overview of the Atmospheric Model Intercomparison Project (AMIP). Bulletin of the American Meteorological Society, 80, 29-55. (back)

    6 Anderson, T.L., R.J. Charlson, S.E. Schwartz, R. Knutti, O. Bucher, H. Rhode, and J. Heitzenberg (2003) Climate forcing by aerosols – a hazy picture. Science, 300, 1103-1104. (back)

    7 R. Jaenicke (2005) Abundance of cellular material and proteins in the atmosphere. Science, 308, 73. (back)

    8 Jacobson, Mark. Z., 2001. Strong radiative heating due to the mixing state of black carbon in atmospheric aerosols. Nature Vol 409, No 6821, pp. 695-7, February 8, 2001 (back)

    9 Chen, Yang, and Joyce E. Penner. 2005. Uncertainty analysis for estimates of the first indirect aerosol effect. Atmospheric Chemistry and Physics, 5, 2935-2948, online (back)

    10 Emanuel, Kerry, 2005. Increasing destructiveness of tropical cyclones over the past 30 years, Nature, 436, 686-688; Webster, P.J., G. J. Holland, J. A. Curry, and H.-R. Chang, 2005: Changes in Tropical Cyclone Number, Duration, and Intensity in a Warming Environment, Science, 309, 1844-1846. (back)

    11 One line of inquiry involves looking at the temporal response to identifiable perturbations like volcanoes or so-called regime changes. It turns out that rapid responses correspond to low sensitivity while slow responses would imply higher sensitivity. Such inquiries invariably show rapid responses. Some examples are R.S. Lindzen and C. Giannitsis (1998) On the climatic implications of volcanic cooling. J. Geophys. Res., 103, 5929-5941; Lindzen, R.S. and C. Giannitsis (2002) Reconciling observations of global temperature change. Geophys. Res. Ltrs. 29, (26 June) 10.1029/2001GL014074; Douglass, D.H., and R.S. Knox (2005) Climate forcing by the volcanic eruption of Mount Pinatubo. Geophys. Res. Letters, 32, L05710, doi:10.1029/2004GL022119. (back)

    12 Chen, J., B.E. Carlson, and A.D. Del Genio, 2002: Evidence for strengthening of the tropical general circulation in the 1990s. Science, 295, 838-841; Del Genio, A. D., and W. Kovari, 2002: Climatic properties of tropical precipitating convection under varying environmental conditions. J. Climate, 15, 2597-2615. (back)

    13 Wielicki, B.A., T. Wong, et al, 2002: Evidence for large decadal variability in the tropical mean radiative energy budget. Science, 295, 841-844; Lin, B., T. Wong, B. Wielicki, and Y. Hu, 2004: Examination of the decadal tropical mean ERBS nonscanner radiation data for the iris hypothesis. J. Climate, 17, 1239-1246. (back)

    14 Cess, R.D. and P.M. Udelhofen, 2003: Climate change during 1985-1999: Cloud interactions determined from satellite measurements. Geophys. Res. Ltrs., 30, No. 1, 1019, doi:10.1029/2002GL016128. (back)

    15 Clement, A.C. and B. Soden (2005) The sensitivity of the tropical-mean radiation budget. J. Clim., 18, 3189-3203. (back)

    16 Chou, M.-D. and R.S. Lindzen (2004) Comments on “Examination of the Decadal Tropical Mean ERBS Nonscanner Radiation Data for the Iris Hypothesis”. J. Clim. 18, 2123-2127. (back)

    17 R.S. Lindzen, M.-D. Chou, and A.Y. Hou (2001) Does the Earth have an adaptive infrared iris? Bull. Amer. Met. Soc. 82, 417-432. (back)

    18 Sun, D-Z. and R.S. Lindzen (1993) Distribution of tropical tropospheric water vapor. J. Atmos. Sci., 50, 1643-1660. (back)

    19 This situation is described in W. Happer (2003) Harmful politicization of science. In Politicizing Science, M. Gough, editor, Hoover Institution Press, Stanford, CA 313 pp. (back)

    20 S. Fred Singer (2003) The Revelle-Gore Story: Attempted political suppression of science. In Politicizing Science, M. Gough, editor, Hoover Institution Press, Stanford, CA 313 pp. (back)

    21 Mann, M.E., Bradley, R.S. and Hughes, M.K., Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations, Geophysical Research Letters, 26, 759-762, 1999. (back)

    About the Author: Richard S. Lindzen is the Alfred P. Sloan Professor of Atmospheric Science at the Massachusetts Institute of Technology. This paper was presented at the Yale Center for the Study of Globalization ( on October 21, 2005, and will appear in the published proceedings of that meeting. Reprinted with permission from the author.

    EcoWorld - Nature and Technology in Harmony

    Posted in Atmospheric Science, Causes, Coal, Energy, Global Warming & Climate Change, History, Literature, Office, Organizations, Other, Ozone, People, Radiation, Science, Space, & Technology, Solar, Volcanoes, Wind2 Comments

    No Posts in Category