Hi John‹It would be good for those trying to understand the causes of ice
age cycling and the potential sensitivity to read the papers of Belgian
professor Andre Berger and his group, who have been looking at the roles of
the various factors in contributing to climate change. Quite clearly, from
Re the various discussions on sensitivity of late here: remember
that Lovelock and Lee Kump have had a simple model for some 15 years in
which sensitivity acts, as Lovelock likes to say, more like a variable than
a constant.perhaps later on climate science will come to organize
climate
John - Thanks for bringing this dialog back to climate sensitivity - which
obviously is a very key parameter for this list. You seem to have correctly
stated the present view of Dr. Hansen as being 3 degrees C per CO2 doubling.
But in your second citation to the work of Dr. Wasdell, Hansen's
Climate sensitivity to a doubling of atmospheric CO2 is only a well defined
term (if at all) if you state what time scales or processes you are
including and what you mean by a doubling of atmospheric CO2.
The higher sensitivity values seem relevant to time scales (i.e., 10 kyr)
where ice sheets
