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Jeudi 3 novembre 2005 4 03 /11 /Nov /2005 00:00

Climate change linked to rise in malaria, asthma

 

By Timothy Gardner

 

NEW YORK (Reuters) - Climate change may promote the spread of deadly diseases like malaria and asthma in both rich and poor countries by increasing the range of parasitic insects and whipping up dust from storms, a new report says.

 

As climates warm, malaria is becoming more common in the traditionally cool mountains of Africa, Asia and Latin America where 10 percent of the world's people live, said Dr. Paul Epstein, the lead author of "Climate Change Futures."

 

"Colonizers escaped (to mountainous areas) to avoid the swamps that bred malaria. Those areas are no longer safe," Epstein told reporters upon presenting the study, noting that malaria cases have quadrupled in the past 10 years and kill 3,000 African babies a day.

 

Epstein, of the Harvard Medical School , wrote the report in collaboration with reinsurer Swiss Re and the United Nations Development Program.

 

The report warned that "malaria could suddenly swell in developed nations, especially in those areas now bordering the margins of current transmission."

 

Scientists believe greenhouse gases, such as carbon dioxide (CO2) released by cars and utilities burning fossil fuels, lead to climate change by trapping the sun's heat in the atmosphere. That can lead to rising seas that may cause flooding and stronger storms.

 

Rising temperatures increase the range of the mosquitoes and ticks that carry maladies like malaria, West Nile virus and Lyme disease, the study said.

 

Cases of asthma, which is worsened by particulates in the air, can increase from greater amounts of CO2, the report said. Plants high in pollen and some soil fungi grow better with higher levels of the gas.

 

WICKED WINDS

 

In addition, climate change's stronger winds increase the amount of dust in the air from expanding deserts, which compound the effects of air pollutants and smog from the burning of fossil fuels as well as the risks to asthma sufferers, it said.

 

That could increase the $18 billion that asthma and allergies cost the U.S. health care system each year, according to the report, which lists suggestions large companies could take to reduce their liabilities from greenhouse gas emissions.

 

Last month, a federal judge dismissed a lawsuit from eight states and New York City against five of the largest U.S. utilities claiming that their emissions were a public nuisance and would cause property harm. The case is on appeal.

 

The authors of the study hope to bring their findings to corporate boards to reduce climate risks and liabilities.

 

Companies can lessen risks by joining markets that trade greenhouse gases and by broadening their energy palate from coal and oil to alternatives such as wind and solar power, and possibly, nuclear and hydrogen power, Epstein said.

 

U.S. President George W. Bush dropped out of Kyoto Protocol on climate change early in his first term.

 

The agreement created a carbon dioxide market in Europe that allows companies that chose not to cut their greenhouse gases to buy credits from companies that have.

 

The United Nations will hold climate talks later this month in Montreal in which countries including the United States will discuss how to proceed with the Kyoto Protocol.

http://today.reuters.co.uk/news/newsArticle.aspx?type=healthNews&storyID=2005-11-02T023942Z_01_WRI184112_RTRIDST_0_HEALTH-ENVIRONMENT-CLIMATE-DISEASE-DC.XML&archived=False

Par Scorpio - Publié dans : climate change
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Mercredi 2 novembre 2005 3 02 /11 /Nov /2005 00:00

Harvard Study Shows Escalating Climate Change Impacts On Human Health, the Environment and the Economy

 

Climate Change Futures Project Led by a Harvard Medical School Center with Sponsorship from Swiss Re and United Nations Development Programme

 

Findings are being announced today at 11:00 a.m., at a press conference at the American Museum of Natural History, New York

 

NEW YORK, Nov. 1 /PRNewswire/ -- The Center for Health and the Global Environment at Harvard Medical School , along with co-sponsors Swiss Re and the United Nations Development Programme, today released a study showing that climate change will significantly affect the health of humans and ecosystems and these impacts will have economic consequences. The study, entitled "Climate Change Futures: Health, Ecological and Economic Dimensions," surveys existing and future costs associated with climate change and the growing potential for abrupt, widespread impacts. The study reports that the insurance industry will be at the center of this issue, absorbing risk and helping society and business to adapt and reduce new risks.

 

"We found that impacts of climate change are likely to lead to ramifications that overlap in several areas including our health, our economy and the natural systems on which we depend," said Dr. Paul Epstein, the study's lead author and Associate Director of the Center for Health and the Global Environment at Harvard Medical School. "A comparable event would be the aftermath of flooding, contamination and homelessness witnessed after Hurricane Katrina hit the US Gulf coast in August. Analysis of the potential ripple effects stemming from an unstable climate shows the need for more sustainable practices to safeguard and insure a healthy future."

 

The Climate Change Futures (CCF) study is comprised of three primary elements: trends, case studies and scenarios, which detail and analyze current climate change related consequences for human health, ecological systems and the global economy. Through two scenarios, the CCF report examines possible impacts of climate change that may impose severe strains on the financial sector.

 

"As a reinsurance company, our goal is to evaluate and plan for the long-term," said Jacques Dubois, Chairman of Swiss Re America Holding Corporation. The parent company, Swiss Re, is a leading global reinsurance company and a co-sponsor of the study. Dubois continued, "Swiss Re has an ongoing effort to focus on potential economic impacts of climate change. This study adds to this by helping to review areas of increased vulnerability to climate change from a unique perspective. Whereas most discussions on climate change impacts hone in on the natural sciences, with little to no mention of potential economic consequences, this report provides a crucial look at physical and economic aspects of climate change. It also assesses current risks and potential business opportunities that can help minimize future risks."

 

There are 10 case studies within the report, written by scientific experts, that outline current effects of climate change with regard to infectious diseases such as malaria, West Nile virus, Lyme disease and asthma; extreme weather events such as heat waves and floods; and ecosystems such as forests, agriculture, marine habitat and water. Economic implications as well as possible near-future impacts are projected for each case.

 

The study shows that warming and extreme weather affect the breeding and range of disease vectors such as mosquitoes responsible for malaria, which currently kills 3,000 African children a day, and West Nile virus, which costs the United States $500 million in 1999. Lyme disease, the most widespread vector-borne disease, is currently increasing in North America as winters warm and ticks proliferate. The study notes that the area suitable for tick habitat will increase by 213 percent by the 2080s. The report also finds that ragweed pollen growth, stimulated by increasing levels of carbon dioxide, may be contributing to the rising incidence of asthma. Charles McNeill, Environment Programme Manager for the United Nations Development Programme, a co-sponsor of the study, pointed out that these costs will fall disproportionately on developing nations.

 

"While developed nations are not immune to the impacts of climate change, those populations that are already struggling with myriad social challenges will bear the greatest brunt of climate change," said Dr. McNeill.

 

Background

 

The CCF project stemmed from a common concern of the Center for Health and the Global Environment at Harvard Medical School , Swiss Re and the United Nations Development Programme. This concern was centered on the emerging threats to health from climate change and the implications of diseases of humans and Earth's life-support systems for economies and development. Unique aspects of the study include:

 

    * Integration of corporate stakeholders in the assessment process

 

    * Combined focus on physical, biological and economic impacts

 

    * Anticipation of short-term impacts, rather than century-scaled

 

      projections

 

    * Scenarios of plausible futures with gradual and step-wise change

 

    * A framework to deal with and plan for climate-related surprise impacts

 

In September 2003, a Scoping Conference for the CCF project was held at the United Nations in New York and involved more than 80 participants from multiple scientific disciplines, corporations, UN agencies and non-governmental organizations. Through the initial deliberations, follow-up workshops and teleconferences, a set of case studies and impact scenarios were developed.

 

In June 2004, a conference and Executive Roundtable were held at Swiss Re's Centre for Global Dialogue at Ruschlikon near Zurich, Switzerland . This gathering expanded the reach of the project to include more representatives from the financial sector, allowing deeper exploration of the links between health, environmental and economic consequences of the changing climate. Risks and opportunities were addressed, as were policies and measures commensurate with the magnitude of the possible futures envisioned.

 

In August 2004, a follow-up workshop was facilitated to standardize the methodology for the case studies and scenarios. The resulting study was released today at the American Museum of Natural History.

 

Organization Profiles

 

The Center for Health and the Global Environment, Harvard Medical School

 

The Mission of the Center for Health and the Global Environment at Harvard Medical School is to help people understand that our health, and that of our children, depends on the health of the environment, and that we must do everything we can to protect it.

 

Swiss Re

 

Swiss Re is one of the world's leading reinsurers and the world's largest life and health reinsurer. The company operates through more than 70 offices in over 30 countries. Swiss Re has been in the reinsurance business since its foundation in Zurich, Switzerland , in 1863. Swiss Re offers a wide variety of products to manage capital and risk. Traditional reinsurance products, including a broad range of property and casualty as well as life and health covers and related services, are complemented by insurance-based corporate finance solutions and supplementary services for comprehensive risk management. Swiss Re is rated "AA" by Standard & Poor's, "Aa2" by Moody's and "A+" by A.M. Best.

 

In addition to its role with the CCF project, Swiss Re has made a multitude of other climate change related commitments, including initiating a 10 year programme combining internal emissions reduction measures with an investment in the World Bank Community Development Carbon Fund. The voluntary initiative makes Swiss Re one of the largest global financial services companies in the world to set itself the goal to become greenhouse neutral. In addition, Swiss Re recently committed to join the Chicago Climate Exchange (CCX®). CCX® is North America 's first and only multi-sector marketplace for reducing and trading greenhouse gas emissions.

 

United Nations Development Programme

 

UNDP is the UN's global development network, focused on helping countries build and share solutions to the challenges of energy and the environment, democratic governance, poverty reduction, HIV/AIDs, and crisis prevention and recovery. At the United Nations Millennium Summit, world leaders placed development at the heart of the global agenda by adopting the Millennium Development Goals (MDGs), which set clear targets for reducing poverty, hunger, disease, illiteracy, environmental degradation and discrimination against women by 2015. On the ground in 166 countries, UNDP helps the UN system and its partners raise awareness and track progress on the MDGs, while using its extensive network to connect donors and developing countries, private and public sectors and policy advice and programme resources to help nations achieve these goals.

 


Source: Swiss Re

 

Par Scorpio - Publié dans : climate change
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Mercredi 26 octobre 2005 3 26 /10 /Oct /2005 00:00

Many scientists see no escape for dramatic Arctic thaw


 

 

In 1969, Roy Koerner, a Canadian government glaciologist, was one of four men (and 36 dogs) who completed the first surface crossing of the Arctic Ocean, from Alaska through the North Pole to Norway.

Today, he said, such a trek would be impossible: There is just not enough ice. In September, the area covered by sea ice reached a record low. "I recently reviewed a proposal by one guy to go across by kayak," Koerner said.

Many scientists say it has taken a long time for them to accept that global warming, partly the result of carbon dioxide and other heat-trapping gases in the atmosphere, could shrink the Arctic 's summer cloak of ice.

But many of those same scientists have concluded that the momentum behind human-caused warming, combined with the region's tendency to amplify change, has put the familiar Arctic past
the point of no return.

The particularly sharp warming and melting in the last few decades is thought by many experts
to result from a mix of human and natural causes. But a number of recent computer simulations of global climate run by half a dozen research centers around the world show that in the future human influence will dominate.

Even with just modest growth in emissions of the greenhouse gases, almost all of the summer sea ice is likely to disappear by late in the century. Some of the simulations, including an advanced model at the National Center for Atmospheric Research in Boulder, Colo. , show much of the summer ice disappearing by 2050, said Marika Holland, a scientist there.

Of the various simulations, all done for an international scientific report on climate trends to be issued in 2007, the only ones that retain much summer sea ice in the Arctic by 2100 are those that assume global greenhouse-gas emissions are held constant at rates measured in 2000 — something that only five years later is already impossible.

The other models all produce an Arctic Ocean in summer akin to the "open polar sea" that was sought by oceanographers and explorers in the mid-1800s.

The models are, of course, impressionistic views of a far more complicated Arctic reality, so their projections are uncertain. But what worries field scientists, who form their opinions based on empirical clues embedded in ice or recorded by thermometers, is that observations of change and evidence pointing to past patterns are agreeing with the models.

"Even if you would stop every engine right now, there is no escape unless you physically take the CO2 out of the air again," said Henk Brinkhuis, an expert on past Arctic ecosystems at Utrecht University in the Netherlands. "You may argue for a long time whether this process will take 20, 50 or 100 years, but it doesn't change the fact that it will happen."

Field work suggests that past Arctic warm spells, like a stretch through the 1920s and 1930s, were limited to certain regions, while the recent warming has largely progressed in concert with rising temperatures around the Northern Hemisphere — a sign of large forces at work, climate scientists say, not regional variability.

The inevitability of summer ice retreats, Arctic experts say, is a result of the nature of the climate system, which is something like a heavy flywheel. Once started, flywheels tend to keep going. Within a few decades, say many scientists focused on the region, the insulating power of greenhouse gases will dominate natural climate fluctuations, possibly for centuries.

The flywheel in the Arctic moves faster than in other areas because the region amplifies change.
The most obvious mechanism is the difference in how bright white sea ice and the dark sea act under sunlight. Ice reflects most of the solar energy striking it back into space. Water absorbs most of it.

A result is that each area of ocean exposed by melting ice soaks up heat, melting more ice, exposing more sea, soaking up even more heat — and so on, until the annual marathons held each spring on the floating ice near the North Pole are replaced by boat races. "You might call it the temperatization of the Arctic; we haven't really invented a word for it yet," said Charles Voeroesmarty, director of the Complex Systems Research Center at the University of New Hampshire and one of 21 co-authors of a recent article in Eos, a journal of the American Geophysical Union, about the changes.

Titled simply "Arctic System on Trajectory to New, Seasonally Ice-Free State," it says, "There seem to be few, if any, processes or feedbacks within the Arctic system that are capable of altering the trajectory."

Climatologists say the effects eventually could extend far beyond the sparsely populated north, contributing to climate and ocean shifts that could dry the American West and possibly slow north-flowing warm currents in the Atlantic Ocean that keep northern Europe milder than it would otherwise be.

The most that can be expected, some climate scientists say, is to limit the human contribution to warming enough to forestall the one truly calamitous, if slow motion, threat in the far north: the melting of Greenland's ice cap.

 

Rising two miles high and spreading over an area twice the size of California, this vast reservoir — essentially the Gulf of Mexico frozen and flipped onto land — contains enough water to raise sea levels worldwide more than 20 feet.

In recent years, the ice sheets of Greenland have been building in the middle through added snowfall but melting even more around the edges in summer. Many Greenland experts say the melting is already winning out.

James E. Hansen, a scientist for the National Aeronautics and Space Administration who has been designing simulations of earth's climate for nearly four decades, is among those who say prompt cuts in emissions can avert a Greenland meltdown.

"It is physically and technologically possible, but there has to be a will to achieve it," Hansen said.

Other scientists are not as optimistic.

Fresh studies of ancient glacial ice and sea-floor sediments show that, if anything, the computer simulations projecting strong warming and ice retreats in the region over the long run may be substantial underestimates, Brinkhuis said.

"Everything we are seeing shows things can move more and faster than we think," he added, referring to geologic and glacial records of past Arctic changes.

The current increase in greenhouse gases, he continued, is similar to past natural changes that profoundly altered the world.

"We have not seen such fast carbon dioxide rises as we have now other than in extreme cases in the past," Brinkhuis said, including periods like one about 50 million years ago that turned the Arctic Ocean into a warm, weed-covered lake.

Brinkhuis and many other veteran Arctic researchers caution that there is something of
a paradox in Arctic trends: While the long-term fate of the region may be mostly sealed, no one should presume that the recent sharp warming and seasonal ice retreats that have caught the world's attention will continue smoothly into the future.

In the short run, the natural fluctuations will most likely sustain those on both sides of the debate over how to respond to global warming, with cool years embraced by skeptics and hotter ones by proponents of cutting the heat-trapping gases, said Richard B. Alley, a geoscientist at Pennsylvania State University .

But he and other scientists say it is clear
that in the long run, the Arctic will get warmer, a conclusion at the heart of the Arctic Climate Impact Assessment, a report commissioned by the eight Arctic nations and released last year.

Holland, the Colorado modeler, has never seen the real Arctic . She said a colleague who spends most summers slogging through ponds of meltwater on Arctic Ocean floes recently proposed creating a program called "Take a Modeler to the Arctic ." The proposal was only half in jest, she said.

"I'd like to see what it's like before it actually disappears," Holland said.

 

 

http://www.timesargus.com/apps/pbcs.dll/article?AID=/20051025/NEWS/510250382/1002/NEWS01

 

Par Scorpio - Publié dans : climate change
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Mercredi 19 octobre 2005 3 19 /10 /Oct /2005 00:00

Hurricane Wilma Grows to Category 5 Storm

 

 

By FREDDY CUEVAS, Associated Press Writer

 

 

SAN PEDRO SULA, Honduras - Gathering strength at a fierce pace, Hurricane Wilma grew into a Category 5 monster storm early Wednesday with 175 mph winds. Forecasters warned the storm was "extremely dangerous" and said a key reading of its pressure was the lowest ever recorded in the Atlantic basin.

 

 

Wilma was dumping rain on Central America and Mexico, and forecasters warned of a "significant threat" to Florida by the weekend.

 

"All interests in the Florida Keys and the Florida peninsula should closely monitor the progress of extremely dangerous Hurricane Wilma," the National Hurricane Center in Miami said in its latest advisory.

 

 

The storm gathered force rapidly over the last day. It was only Tuesday morning that Wilma grew from a tropical storm into a weak hurricane.

 

At 5 a.m. EDT, U.S.. Air Force reconnaissance planes measured Wilma's top sustained winds at 175 mph, making it a Category 5 hurricane, the Hurricane Center said. At that time, the storm was centered about 170 miles south-southwest of Grand Cayman Island and about 365 miles southeast of Cozumel, Mexico .

It was moving west-northwest at nearly 8 mph and was expected to turn northwest, the Hurricane Center said.

 

"It does look like it poses a significant threat to Florida by the weekend. Of course, these are four- and five-day forecasts, so things can change," said Dan Brown, a meteorologist at the U.S. National Hurricane Center.

 

The Air Force plane recorded a preliminary pressure reading Wednesday morning of 884 millibars, the lowest minimum pressure ever recorded in a hurricane in the Atlantic basin. Lower pressure translates into higher wind speed.

 

Jamaica, Cuba, Nicaragua and Honduras were getting heavy rain from the storm, though it wasn't likely to make landfall in any of those countries.

Forecasts showed it would likely turn toward the narrow Yucatan Channel between Cuba and Mexico's Cancun region — then move into the storm-weary Gulf.

 

With heavy rain, high winds, and rough seas already pounding coastal areas, flood-prone Honduras warned that Wilma posed "an imminent threat to life and property" and closed two seaports on its Caribbean coast.

Neighboring also declared an alert. Authorities in the Cayman  Islands had earlier called an alert.

 

Honduras and its neighbors already are recovering from flooding and mudslides caused earlier this month from storms related to Hurricane Stan. At least 796 people were killed, most of them in Guatemala, with many more still missing.

 

Cuba issued a hurricane watch for the western end of the island from Matanzas to Pioneer del Rio , as well as the Isle of Youth. Mexico issued a hurricane watch for nearly all of its Caribbean coast from Punta Gruesa to Cabo Catoche, an area that includes the resort of Cancun .

 

Wilma already had been blamed for one death in Jamaica as a tropical depression Sunday. It has flooded several low-lying communities and triggered mudslides that blocked roads and damaged several homes, said Barbara Carby, head of Jamaica's emergency management office. She said that some 250 people were in shelters throughout the island.

 

Although the storm was not expected to approach Florida until the weekend, some residents began buying water, canned food and other emergency supplies early. Many said they take every storm seriously now, after witnessing the devastation from a succession of hurricanes that have ravaged the southern United States.

 

"People have learned their lesson and know better how to prepare. We're not waiting until the last minute anymore," said Andrea Yerger, 48, of Port Charlotte, Florida . She was buying material to protect her house, which had to be gutted because of extensive damage from Hurricane Charley last year.

 

Wilma's track could take it near Punta Gorda on Florida's southwestern Gulf Coast and other areas in the state hit by Hurricane Charley, a Category 4 storm, in August 2004.

 

Forecasters urged Florida residents to closely monitor Wilma. The state has seen seven hurricanes hit or pass close by since August 2004, causing more than $20 billion in estimated damage and killing nearly 150 people.

 

In the Cayman Islands , authorities urged businesses to close early Tuesday to give employees time to prepare for the storm. Schools were ordered to close on Wednesday.

 

In Mexico, the MTV Latin America Video Music Awards ceremony, originally scheduled to be held Thursday at a seaside park south of Cancun , were moved up one day to avoid possible effects from Wilma.

 

 

Forecasters said Wilma should avoid the central U.S. Gulf coast devastated by Hurricanes Katrina and Rita earlier this year which killed more than 1,200 people and caused billions of dollars in damage.

 

"There's no scenario now that takes it toward Louisiana or Mississippi, but that could change," said Max Mayfield, director of the National Hurricane Center .

 

The storm is the record-tying 12th hurricane of the season, the same number reached in 1969. That is the most for one season since record-keeping began in 1851.

 

On Monday, Wilma became the Atlantic hurricane season's 21st named storm, tying the record set in 1933 and exhausting the list of names for this year.

 

The six-month hurricane season does not end until Nov. 30. Any new storms would be named with letters from the Greek alphabet, starting with Alpha.

 

Par Scorpio - Publié dans : Natural disasters
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Mercredi 19 octobre 2005 3 19 /10 /Oct /2005 00:00

Source : AP

Par Scorpio - Publié dans : Natural disasters
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