Climate Chaos Lurks, Science Communicators Consider Change of Tactics

Nearly 60 million people living around the Himalayas will suffer food shortages in the coming decades as glaciers shrink and the water sources for crops dry up, a Dutch study shows, while in Australia representatives of scientific organisations including the CSIRO and Bureau of Meteorology meet to discuss better communication of the science behind man-made climate change, in the wake of crumbling political and public consensus on global warming.

By Michael Casey, AP Environmental Writer in the Courier Mail (10 June 2010):

DUBAI, United Arab Emirates – Nearly 60 million people living around the Himalayas will suffer food shortages in the coming decades as glaciers shrink and the water sources for crops dry up, a study said Thursday.

But Dutch scientists writing in the journal Science concluded the impact would be much less than previously estimated a few years ago by the U.N. Intergovernmental Panel on Climate Change. The U.N. report in 2007 warned that hundred of millions of people were at risk from disappearing glaciers.

The reason for the discrepancy, scientists said, is that some basins surrounding the Himalayas depend more on rainfall than melting glaciers for their water sources.

Those that do count heavily on glaciers like the Indus, Ganges and Brahamaputra basins in South Asia could see their water supplies decline by as much as 19.6 percent by 2050. China’s Yellow River basin, in contrast, would see a 9.5 percent increase precipitation as monsoon patterns change due to the changing climate.

“We show that it’s only certain areas that will be affected,” said Marc Bierkens, an Utrecht University hydrology professor , who along with Walter Immerzee and Ludovicus van Beek conducted the study. “The amount of people affected is still large. Every person is one too many but it’s much less than was first anticipated.”

The study is one of the first to examine the impact of shrinking glaciers on the Himalayan river basins. It will likely further fuel the debate on the degree that climate change will devastate the river basins that are mostly located in India, Pakistan, Nepal, Bangladesh, Bhutan and China.

Scientists for the most part agree glaciers are melting at an accelerated rate as temperatures increase. Most scientists tie that warming directly to higher atmospheric concentrations of greenhouse gases such as carbon dioxide.

Some glaciers, such as in the Himalayas, could hold out for centuries in a warmer world. But more than 90 percent of glaciers worldwide are in retreat, with major losses already seen across much of Alaska, the Alps, the Andes and numerous other ranges, according to researchers in the United States and Europe.

Some scientists have come under fire for the 2007 U.N. report, which includes several errors that suggested the Himalayas could disappear by 2035, hundreds of years earlier than data actual indicates. The mistake — the 2350 apparently was transposed as 2035 — opened the door for attacks by climate change skeptics.

The findings by the Dutch team in Science were greeted with caution with glacial experts who did not take part in the research. They said the uncertainties and lack of data for the region makes it difficult to say what will happen in the next few decades to the water supply.

Others like Zhongqin Li, director of the Tianshan Glaciological Station in China, said the study omitted several other key basins in central Asia and northwest China which will be hit hard by the loss of water from melting glaciers.

Still, several of these outside researchers said the findings should reaffirm concerns that the region will suffer food shortages due to climate change, exasperating already existing concerns such as overpopulation, poverty, pollution and weakening monsoon rains in parts of South Asia.

“The paper teaches us there’s lot of uncertainty in the future water supply of Asia and within the realm of plausibility are scenarios that may give us concern,” said Casey Brown, an assistant professor of civil and environmental engineering at the University of Massachusetts.

“At present, we know that water concerns are already a certainty – the large and growing populations and high dependence on irrigated agriculture which makes the region vulnerable to present climate variability,” he said.

“This paper is additional motivation to address these present concerns through wise investments in better management of water resources in the region, which for me means forecasts, incentives, efficiency.”

Birkens and his fellow researchers said governments in the region should adapt to the projected water shortages by shifting to crops that use less water, engaging in better irrigation practices and building more and larger facilities to store water for extended periods of time.

“We estimate that the food security of 4.5 percent of the total population will be threatened as a result of reduce water availability,” the researchers wrote. “The strong need for prioritizing adaptation options and further increasing water productivity is therefore eminent.”

Source: www.news.yahoo.com

Tom Arup in The Age (15 June 2010):

Representatives of scientific organisations including the CSIRO and Bureau of Meteorology will meet today to discuss better communication of the science behind man-made climate change, in the wake of crumbling political and public consensus on global warming.

The conference in Sydney, organised by the Federation of Australian Scientific and Technological Societies (FASTS), is part of a long-term bid to develop a ”national communication charter” for major scientific organisations and universities to better spruik the evidence of climate change.

The conference will hear an address from Australia’s chief scientist, Penny Sackett. Representatives of the CSIRO, Bureau of Meteorology, Australian Academy of Science and Department of Climate Change, among others, will attend.

Public scepticism and apathy towards climate change has reportedly risen in Australia in recent years. A recent Lowy Institute Poll showed the number of Australians who wanted action now on climate change had dropped from 68 per cent in 2006 to 46 per cent in 2010.

FASTS president Cathy Foley said although public scepticism was on the rise, scientific evidence of man-made climate change had not changed, and it was sad the community was less and less trusting of scientists.

Dr Foley said a well-organised and funded climate sceptics’ movement had increasingly captured attention.

”We are concerned the debate around climate change has become a left-wing versus right-wing debate – or a kind of religious argument – when it should really be about the strength of the scientific evidence,” Dr Foley said.

The conference was not about politics or ”brainwashing” the public, she added.

Many in the scientific community have expressed frustration about the shift in public mood on climate change after the failed Copenhagen climate change summit last year.

The summit failures came as damaging emails between scientists at the University of East Anglia, in Britain, were leaked, and the UN Intergovernmental Panel on Climate Change admitted it had wrongly stated most of the Himalayan glaciers would melt by 2035 because of global warming.

In response, the CSIRO and Bureau of Meteorology in March released a snapshot report on climate change, showing Australia has warmed significantly over the past 50 years and stating categorically ”climate change is real”.

In February, scientist Tim Flannery urged scientists to again explain the evidence of man-made climate change to a ”confused” Australian public.

Source: www.theage.com.au