Ross
10-11-2004, 11:24 AM
The anti-science Bush admin has always pooh-poohed the view of mainstream scientists that the worldwide pumping of CO2 and other greenhouse gases into the atmosphere could lead to a disasterous global warming effect. Bush follows the Limbaugh view that these are just alarmist scientists. The latest:
Surprise CO2 rise may speed up global warming
( http://news.independent.co.uk/world/environment/story.jsp?story=570734 )
"The rate at which global warming gases are accumulating in the atmosphere has taken a sharp leap upwards, leading to fears that the devastating effects of climate change may hit the world even sooner than has been predicted.
Atmospheric levels of carbon dioxide (CO2 ), the principal greenhouse gas, have made a sudden jump that cannot be explained by any corresponding jump in terrestrial emissions of CO2 from power stations and motor vehicles - because there has been none.
Some scientists think instead that the abrupt speed-up may be evidence of the long-feared climate change "feedback" mechanism, by which global warming causes alterations to the earth's natural systems and then, in turn, causes the warming to increase even more rapidly than before.
Such a development would mean the worldwide droughts, agricultural failure, sea-level rise, increased weather turbulence and flooding all predicted as consequences of climate change would arrive on much shorter time-scales than present scenarios suggest, and the world would have much less time to co-ordinate its response.
Only last month, Tony Blair expressed anxiety that global warming's dire effects would arrive not just in his children's lifetime, but in his own, and would "radically alter human existence".
The feedback phenomenon has already been predicted in the supercomputer models of the global climate on which the current forecasts of warming are based. A key aspect is the weakening, caused by the warming itself, of the earth's ability to remove huge amounts of CO2 from the atmosphere by absorbing it annually in its forests and oceans, in the so-called carbon cycle. (The forests and oceans are referred to as carbon "sinks".)
Hitherto, however, that weakening has been put decades into the future.
The possibility that it may be occurring now is suggested in the long run of atmospheric CO2 measurements that have been made since 1958 at the observatory on the top of Mauna Loa, an 11,000ft volcano in Hawaii, by the American physicist Charles Keeling, from the University of California at San Diego.
... "
Surprise CO2 rise may speed up global warming
( http://news.independent.co.uk/world/environment/story.jsp?story=570734 )
"The rate at which global warming gases are accumulating in the atmosphere has taken a sharp leap upwards, leading to fears that the devastating effects of climate change may hit the world even sooner than has been predicted.
Atmospheric levels of carbon dioxide (CO2 ), the principal greenhouse gas, have made a sudden jump that cannot be explained by any corresponding jump in terrestrial emissions of CO2 from power stations and motor vehicles - because there has been none.
Some scientists think instead that the abrupt speed-up may be evidence of the long-feared climate change "feedback" mechanism, by which global warming causes alterations to the earth's natural systems and then, in turn, causes the warming to increase even more rapidly than before.
Such a development would mean the worldwide droughts, agricultural failure, sea-level rise, increased weather turbulence and flooding all predicted as consequences of climate change would arrive on much shorter time-scales than present scenarios suggest, and the world would have much less time to co-ordinate its response.
Only last month, Tony Blair expressed anxiety that global warming's dire effects would arrive not just in his children's lifetime, but in his own, and would "radically alter human existence".
The feedback phenomenon has already been predicted in the supercomputer models of the global climate on which the current forecasts of warming are based. A key aspect is the weakening, caused by the warming itself, of the earth's ability to remove huge amounts of CO2 from the atmosphere by absorbing it annually in its forests and oceans, in the so-called carbon cycle. (The forests and oceans are referred to as carbon "sinks".)
Hitherto, however, that weakening has been put decades into the future.
The possibility that it may be occurring now is suggested in the long run of atmospheric CO2 measurements that have been made since 1958 at the observatory on the top of Mauna Loa, an 11,000ft volcano in Hawaii, by the American physicist Charles Keeling, from the University of California at San Diego.
... "