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What is the long term sensitivity to increasing CO 2 ? What, indeed, does long term sensitivity even mean? Jim Hansen and some colleagues (not including me) have a preprint available that claims that it is around 6ºC based on paleo-climate evidence.

RealClimate

http://www.realclimate.org/index.php/archives/2008/04/target-co2/
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NASA warming scientist: &#039;This is the last chance&#039;

http://www.seattlepi.com/national/1501ap_sci_warming_scientist.html
MELBOURNE (AFP) — A giant white kangaroo bounced into the science books on Tuesday as part of a global experiment to measure the amount of light the Earth reflects back to the sun. The cardboard cut-out marsupial, which measures 32 metres (105 feet) by 18 metres, was laid out in a paddock on the grounds of Monash University in the southern city of Melbourne. "We call it our kangaroo from space because two satellites flew over (and) what they were doing was measuring the amount of light reflected from our kangaroo," Professor Patricia Vickers-Rich told AFP. "And the point of that was to make people aware that reflected light, or lack of reflected light, has a very big effect on climate." Scientists are concerned that the melting of the polar ice caps, happening at a faster rate than expected, is quickly robbing the earth of some of the vast white spaces which have traditionally reflected the sun's rays, she said.

AFP: &#039;Space&#039; kangaroo shines light on global warming

http://afp.google.com/article/ALeqM5if_AhqTfid9FwPknJUnS4SzfmP4w
http://www.trust.org/alertnet/ In April, AlertNet is launching a multimedia special report looking at the countless "silver bullets" needed to tackle hunger in a world of growing population, urbanisation and climate change more

Reuters AlertNet - Giant kangaroo image gives clues on climate

http://www.giss.nasa.gov/ Fry, M.M., V. Naik, J.J. West, M.D. Schwarzkopf, A.M. Fiore, W.J.

NASA GISS: NASA Goddard Institute for Space Studies