Global temperatures will drop slightly this year as a result of the cooling effect of the La Nina current in the Pacific, UN meteorologists have said.

The World Meteorological Organization's secretary-general, Michel Jarraud, told the BBC it was likely that La Nina would continue into the summer.

This would mean global temperatures have not risen since 1998, prompting some to question climate change theory.

But experts say we are still clearly in a long-term warming trend - and they forecast a new record high temperature within five years.

The WMO points out that the decade from 1998 to 2007 was the warmest on record. Since the beginning of the 20th Century, the global average surface temperature has risen by 0.74C.

 Source : BBC Science

This is the result of global warming, said British Antarctic Survey scientist David Vaughan. Because scientists noticed satellite images within hours, they diverted satellite cameras and even flew an airplane over the ongoing collapse for rare pictures and video.

"It's an event we don't get to see very often," said Ted Scambos, lead scientist at the National Snow and Ice Data Center in Boulder, Colo. "The cracks fill with water and slice off and topple... That gets to be a runaway situation."

While icebergs naturally break away from the mainland, collapses like this are unusual but are happening more frequently in recent decades, Vaughan said. The collapse is similar to what happens to hardened glass when it is smashed with a hammer, he said. The rest of the Wilkins ice shelf, which is about the size of Connecticut, is holding on by a narrow beam of thin ice. Scientists worry that it too may collapse. Larger, more dramatic ice collapses occurred in 2002 and 1995.

 Source : Yahoo News

 Source : Live Science

Artificial life forms, robots that mimic natural processes, and even people who spend all day in front of the computer and rarely experience the real outdoors, may all fundamentally affect the quality of nature in Britain over the next 45 years. According to 35 environmental scientists, drawn from the government as well as colleges and charities, a host of new threats and opportunities for UK biodiversity is gathering pace as technologies develop, social habits alter and the possibility of large-scale responses to phenomena like climate change grows.

The scientists have drawn up a list of 25 factors, including the rising demand for food and biofuels, thought to be having an immediate effect. These, say the scientists, are already putting worse pressure on the habitats of birds and mammals. Others factors, such as sea-level rise, extra fire risk and extreme weather events, are looming with climate change.

But many more challenges, identified in the "horizon-scanning" report, come from what now appears science fiction. Environmental manipulation could be a quick-fix way to mitigate climate change, scientists say. Putting trillions of lenses in orbit to deflect the sun's energy, building giant mirrors in space, fertilising oceans with iron filings and laying reflective covers on deserts, have all been suggested, says the paper in the British Ecological Society's Journal of Applied Ecology.

The paper's authors do not try to judge the ideas or even predict any follow-up. However, they say the public reaction to GM food, in particular, has taught them to look ahead to what society is likely to consider important.

 Source : Guardian UK

The study was carried out over the course of a decade

Average glacial shrinkage has risen from 30 centimetres per year between 1980 and 1999, to 1.5 metres in 2006.

Some of the biggest losses have occurred in the Alps and Pyrenees mountain ranges in Europe.

Experts have called for "immediate action" to reverse the trend, which is seen as a key climate change indicator.

Estimates for 2006 indicate shrinkage of 1.4 metres of 'water equivalent' compared to half a metre in 2005.

Achim Steiner, Under-Secretary General of the UN and executive director of its environment programme (UNEP), said: "Millions if not billions of people depend directly or indirectly on these natural water storage facilities for drinking water, agriculture, industry and power generation during key parts of the year.

"There are many canaries emerging in the climate change coal mine. The glaciers are perhaps among those making the most noise and it is absolutely essential that everyone sits up and takes notice.

 Source : BBC Science

Scientists measuring the health of almost 30 glaciers around the world found that ice loss reached record levels in 2006, the U.N. agency said.

UNEP warned that further ice loss could have dramatic consequences particularly in India, whose rivers are fed by Himalayan glaciers.

The west coast of North America, which gets much of its water from glaciers in mountain ranges such as the Rockies and Sierra Nevada, also would be affected, it said.

"There are many canaries emerging in the climate change coal mine," UNEP's executive director Achim Steiner said in a statement. "The glaciers are perhaps among those making the most noise and it is absolutely essential that everyone sits up and takes notice."

 Source : Yahoo News

The U.S. transportation system was designed and built for local weather and climate conditions, predicated on historical temperature and precipitation data. The report finds that climate predictions used by transportation planners and engineers may no longer be reliable, however, in the face of new weather and climate extremes. Infrastructure pushed beyond the range for which it was designed can become stressed and fail, as seen with loss of the U.S. 90 Bridge in New Orleans after Hurricane Katrina.

"The time has come for transportation professionals to acknowledge and confront the challenges posed by climate change, and to incorporate the most current scientific knowledge into the planning of transportation systems," said Henry Schwartz Jr., past president and chairman of Svedrup/Jacobs Civil Inc., and chair of the committee that wrote the report. "It is now possible to project climate changes for large subcontinental regions, such as the Eastern United States, a scale better suited for considering regional and local transportation infrastructure."

 Source : Science Daily

Snow cover over North America and much of Siberia, Mongolia and China is greater than at any time since 1966.

The U.S. National Climatic Data Center (NCDC) reported that many American cities and towns suffered record cold temperatures in January and early February. According to the NCDC, the average temperature in January "was -0.3 F cooler than the 1901-2000 (20th century) average."

China is surviving its most brutal winter in a century. Temperatures in the normally balmy south were so low for so long that some middle-sized cities went days and even weeks without electricity because once power lines had toppled it was too cold or too icy to repair them.

There have been so many snow and ice storms in Ontario and Quebec in the past two months that the real estate market has felt the pinch as home buyers have stayed home rather than venturing out looking for new houses.

In just the first two weeks of February, Toronto received 70 cm of snow, smashing the record of 66.6 cm for the entire month set back in the pre-SUV, pre-Kyoto, pre-carbon footprint days of 1950.

And remember the Arctic Sea ice? The ice we were told so hysterically last fall had melted to its "lowest levels on record? Never mind that those records only date back as far as 1972 and that there is anthropological and geological evidence of much greater melts in the past.

The ice is back.

 Source : National Post / Opinion

A study in Science journal says climate change, fishing, pollution and other human factors have exacted a heavy toll on almost half of the marine waters. Only remote icy areas near the poles are relatively pristine, but they face threats as ice sheets melt, they warn.

The authors say the data is a "wake-up call" to policymakers.

Lead scientist, Dr Benjamin Halpern, of the National Center for Ecological Analysis and Synthesis in Santa Barbara, US, said humans were having a major impact on the oceans and the marine ecosystems within them.

 "In the past, many studies have shown the impact of individual activities," he said. "But here for the first time we have produced a global map of all of these different activities layered on top of each other so that we can get this big picture of the overall impact that humans are having rather than just single impacts."

 Soruce :  BBC Science

The report for Britain's Department of Health estimated more than 3,000 people could die in an intense summer hot spell in southeast England, with just as many more dying from heat-related deaths over the summer.

Until 2012, when London stages the summer Olympic Games, the odds of thousands dying in summer heat each year will be 1 in 40, the report said, and thousands more could die each year as a result of other effects of global warming and air pollution.

"In terms of conventional thinking about risks to health, a risk of 1 in 40 is high," the report said.

Tens of thousands died across Europe in a heat wave during the summer of 2003, including over 14,000 people in France, but so far people living in Britain have coped with rising temperatures.

Although more summer deaths are expected, fewer people will die in Britain as a result of cold winter weather, as the world warms up because of rising carbon emissions from human activity.

 Source : Reuters.com

The melting of Arctic sea ice is one "tipping element"

Many of Earth's climate systems will undergo a series of sudden shifts this century as a result of human-induced climate change, a study suggests.

A number of these shifts could occur this century, say the report's authors.

They argue that society should not be lulled into a false sense of security by the idea that climate change will be a gradual process. The work by an international team appears in the Proceedings of the National Academy of Sciences journal. "Our findings suggest that a variety of tipping elements could reach their critical point within this century under human-induced climate change," said Professor Tim Lenton from the University of East Anglia, the lead researcher on the study.

"The greatest threats are tipping of the Arctic sea-ice and the Greenland ice sheet, and at least five other elements could surprise us by exhibiting a nearby tipping point."

The bulk of climate scientists now believe that human induced global warming has begun to affect some aspects of our climate.

 Source : BBC Science

The work can help prioritise investment, say the authors

Climate change could cause severe crop losses in South Asia and southern Africa over the next twenty years, a study in the journal Science says.

The findings suggest southern Africa could lose more than 30% of its main crop, maize, by 2030.

In South Asia losses of many regional staples, such as rice, millet and maize could top 10%, the report says.

The effects in these two regions could be catastrophic without effective measures to adapt to climate change.

The majority of the world's one billion poor depend on agriculture for their livelihoods. Yet, said lead author David Lobell, it is also "the human enterprise most vulnerable to climate change".

The researcher, from Stanford University in California, added: "Understanding where these climate threats will be greatest, for what crops and on what time scales, will be central to our efforts at fighting hunger and poverty over the coming decades."

 Source : BBC News

About 1.1 billion people living on the globe already suffer from a serious lack of fresh water. By 2025 this number will increase to three billion – over 40 percent of the entire population.

Director of the Institute of Water Problems of the Russian Academy of Sciences, Viktor Danilov-Danilyan, believes that it is easy to predict the time when the global water crisis is going to hit the planet.

The current growth of population automatically leads to the growing consumption of water. The amount of economically available water decreases. The crisis will thus occur during 2025-2030. About a half of world’s population will face a serious shortage of water.

 Source : Pravda.ru

An international satellite network measuring the thickness of the glaciers as they shrink year by year has found that the glaciers have melted so rapidly during the past 10 years that the continent is losing almost as much ice as Greenland, according to researchers gathering the satellite data.

Although the effect of all this ice loss on global sea levels is still small - measured in a rise of only a few thousands of an inch each year so far from the melting in Antarctica - that increase has nearly doubled in the past 10 years, he estimated.

 Source : SFGate.com

Scientists noted sea temperatures had also risen significantly

The level of the Mediterranean Sea is rising rapidly and could increase by up to half a metre in the next 50 years, scientists in Spain have warned.

A study by the Spanish Oceanographic Institute says levels have been rising since the 1970s with the rate of increase growing in recent years.

It says even a small rise could have serious consequences in coastal areas.

The study noted that the findings were consistent with other investigations into the effects of climate change.

The study, entitled Climate Change in the Spanish Mediterranean, said the sea had risen "between 2.5mm and 10mm (0.1 and 0.4in) per year since the 1990s".

If the trend continued it would have "very serious consequences" in low-lying coastal areas even in the case of a small rise, and "catastrophic consequences" if a half-metre increase occurred, the study warned.

 Source : BBC Science

Al Gore says global warming is a planetary emergency. It is difficult to see how this can be so when record low temperatures are being set all over the world. In 2007, hundreds of people died, not from global warming, but from cold weather hazards.

Since the mid-19th century, the mean global temperature has increased by 0.7 degrees Celsius. This slight warming is not unusual, and lies well within the range of natural variation. Carbon dioxide continues to build in the atmosphere, but the mean planetary temperature hasn't increased significantly for nearly nine years. Antarctica is getting colder. Neither the intensity nor the frequency of hurricanes has increased. The 2007 season was the third-quietest since 1966. In 2006 not a single hurricane made landfall in the U.S.

 Source : Washington Times

Sea level rise is fuelled by melting ice in Greenland and Antarctica

The Intergovernmental Panel on Climate Change proposes a maximum sea level rise of 81cm (32in) this century.

But in the journal Nature Geoscience, researchers say the true maximum could be about twice that: 163cm (64in).

They looked at what happened more than 100,000 years ago - the last time Earth was this warm.

The results join other studies showing that current sea level projections may be very conservative.

Sea level rise is a key effect of global climate change. There are two major contributory effects: expansion of sea water as the oceans warm, and the melting of ice over land.

In the latest study, researchers came up with their estimates by looking at the so-called interglacial period, some 124,000 to 119,000 years ago, when Earth's climate was warmer than it is now due to a different configuration of the planet's orbit around the Sun.

That was the last time sea levels reached up to 6m (20ft) above where they are now, fuelled by the melting of ice sheets that covered Greenland and Antarctica.

 Source : BBC Science / Nature

Greenland's ice sheet melted nearly 19 billion tons more than the previous high mark, and the volume of Arctic sea ice at summer's end was half what it was just four years earlier, according to new NASA satellite data obtained by The Associated Press.

"The Arctic is screaming," said Mark Serreze, senior scientist at the government's snow and ice data center in Boulder, Colo.

Just last year, two top scientists surprised their colleagues by projecting that the Arctic sea ice was melting so rapidly that it could disappear entirely by the summer of 2040.

This week, after reviewing his own new data, NASA climate scientist Jay Zwally said: "At this rate, the Arctic Ocean could be nearly ice-free at the end of summer by 2012, much faster than previous predictions."

 Source : Yahoo News

Arctic summer melting in 2007 set new records

Their latest modelling studies indicate northern polar waters could be ice-free in summers within just 5-6 years.

Professor Wieslaw Maslowski told an American Geophysical Union meeting that previous projections had underestimated the processes now driving ice loss.

Summer melting this year reduced the ice cover to 4.13 million sq km, the smallest ever extent in modern times.

Remarkably, this stunning low point was not even incorporated into the model runs of Professor Maslowski and his team, which used data sets from 1979 to 2004 to constrain their future projections.

"So given that fact, you can argue that may be our projection of 2013 is already too conservative."

 Source : BBC News

The damage could release somewhere between 55.5bn-96.9bn tons of carbon dioxide into the atmosphere from the Amazon's forests and speed up global warming, according to the report, Amazon's Vicious Cycles: Drought and Fire.

Trends in agriculture and livestock expansion, fire, drought and logging could severely damage 55% of the Amazon rainforest by 2030, the report says. And, in turn, climate change could speed up the process of destruction by reducing rainfall by as much as 10% by 2030, damaging an extra 4% of the forests during that time.

By the end of the century, global warming is likely to reduce rainfall by 20% in eastern Amazonia, pushing up temperatures by more than 2C and causing forest fires, the report said.

Destroying almost 60% of tropical rainforest by 2030 would do away with one of the key stabilisers of the global climate system, it warned. Such damage could have a knock-on effect on rainfall in places such as central America and India, and would also destroy livelihoods for indigenous people and some 80% of habitats for animal species in the region.  ( Source : Guardian UK )

More than 3,000 flying foxes dropped dead, falling from trees in Australia. Giant squid migrated north to commercial fishing grounds off California, gobbling anchovy and hake. Butterflies have gone extinct in the Alps.

While humans debate at U.N. climate change talks in Bali, global warming is already wreaking havoc with nature. Most plants and animals are affected, and the change is occurring too quickly for them to evolve.

"A hell of a lot of species are in big trouble," said Stephen E. Williams, the director of the Centre for Tropical Biodiversity & Climate Change at James Cook University in Australia.

"I don't think there is any doubt we will see a lot of (extinctions)," he said. "But even before a species goes extinct, there are a lot of impacts. Most of the species here in the wet tropics would be reduced to ... 15 percent of their current habitat."

Globally, 30 percent of the Earth's species could disappear if temperatures rise 4.5 degrees Fahrenheit — and up to 70 percent, if they rise 6.3 degrees Fahrenheit, a U.N. network of scientists reported last month.

 Source : Yahoo News