Clouds, Seas to Be Targeted by U.N. Climate Report
Date: 19-Jul-09
Country: NORWAY
Author: Alister Doyle, Environment Correspondent
Clouds, Seas to Be Targeted by U.N. Climate Report Photo: Parth Sanyal
A farmer and his bullocks cross a highway against the
backdrop of monsoon clouds in Singur, about 50 km (31 miles) northwest of
the eastern Indian city of Kolkata.
Photo: Parth Sanyal
OSLO - Cloud formation, sea level rises and extreme weather events are among
areas set to get more attention in the next U.N. report on global warming
due in 2014, the head of the Nobel Peace Prize winning panel said on Friday.
Rajendra Pachauri also said the panel did not plan to issue more frequent
reports as suggested by some governments, reckoning that several years were
needed to come up with robust findings. The last series of reports was in
2007.
"We would certainly have much more greater detail," in the next reports,
Pachauri told Reuters in a telephone interview from Venice, where leading
scientists have been meeting from July 13-17 to work on an outline to be
approved later this year.
"In the case of clouds we will certainly provide much greater emphasis in
this report -- clouds, aerosols, black carbon. These are issues that we will
certainly cover in much greater detail," he said.
The 2007 report pointed to cloud formation as a big uncertainty in climate
change. Warmer air can absorb more moisture and so lead to more clouds in
some regions -- the white tops can reflect heat back into space and offset
any warming.
In an opposite effect, black carbon -- or soot from sources such as
factories or forest fires -- can blanket ice and snow with a heat-absorbent
dark layer and so accelerate a thaw.
"Sea level rise is another issue that...will get much greater in-depth
attention," he said.
Scenarios for sea level rise this century in the 2007 report ranged from 18
to 59 cm (7-24 inches). But it said that 59 cm should not be considered an
upper limit because of uncertainties about a possible melt of Greenland and
Antarctica.
HEATWAVES, MUDSLIDES
And the panel, the Intergovernmental Panel on Climate Change (IPCC), is also
planning an extra report on extreme events such as droughts, floods,
heatwaves or mudslides projected because of global warming.
Pachauri said the next report by the IPCC, which shared the 2007 Nobel Prize
with former U.S. Vice President Al Gore, was intended to guide nations after
the planned agreement of a new U.N. climate treaty in Copenhagen in
December.
He welcomed an agreement by major economies at a Group of Eight summit in
Italy last week to recognize a broad scientific view that world temperature
rises should not exceed 2 Celsius (3.6 Fahrenheit) above pre-industrial
times.
But he said too little was being done to achieve the limit.
"It's a step forwards. I wish they would have made some commitments on what
would ensure limiting the temperature increase to 2 degrees," he said.
"In the (2007 report) we said if you want to limit temperatures to that
range all we have is up to 2015 as the year when global emissions must peak
and they must decline thereafter," he said.
Greenhouse gas emissions, mainly from burning fossil fuels, have risen fast
in recent years although recession is now curbing industrial activity in
many nations. China has overtaken the United States as top emitter.
Of 177 scientific scenarios in the 2007 report, only 6 looked at tough
emissions curbs needed to keep temperature rises below 2 Celsius.
Governments have put more funding into scientific research into higher
emissions limits that they judge to be more likely.
"We're certainly going to look at much more stringent mitigation," Pachauri
said, when asked if governments were still reluctant to put money into
looking at curbs needed to achieve the 2 Celsius limit.
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