[ RadSafe ] Global Warming

[Otto Raabe]

December 3, 2009

The earth is now in the eleventh year of a slow global cooling trend 
following a local peak temperature in 1998. Atmospheric carbon 
dioxide levels have been going up but the earth's temperature has 
not. Atmospheric scientists should be aware that there is too little 
carbon dioxide in the atmosphere to have a major effect on the 
Earth's temperature and there is really no meaningful correlation 
between carbon dioxide levels and the earth average temperature over 
past centuries. Even the Earth's recent local peak temperature in 
1998 was low in comparison to the peak about 1,000 years ago when 
Erik-the-Red went to "Greenland" and found fertile green meadows and 
a pleasant warm climate in summer. The earth is now very near the 
average temperature of the last 2,000 years and is in a cooling phase 
associated with low sunspot activity.

References:

Loehle, C. 2007. A 2000-year global temperature reconstruction based 
on non-tree ring proxies. Energy and Environment, 18, 1049-1058.

Loehle, C. and J.H. McCulloch. 2008. Correction to: A 2000-year 
global temperature reconstruction based on non-tree ring proxies. 
Energy and Environment, 19, 93-100.


Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754   FAX: (530) 758-6140