Principal Research Scientist at the Earth System Science Center at the University of Alabama in Huntsville
Con to the question "Is Human Activity Primarily Responsible for Global Climate Change?"
"[W]e are finding satellite evidence that the climate system is much less sensitive to greenhouse gas emissions than the U.N.’s Intergovernmental Panel on Climate Change (IPCC, 2007) climate models suggest that it is. And if that is true, then mankind’s CO2 emissions are not strong enough to have caused the global warming we’ve seen over the last 100 years...
[M]ost of the warming could be the result of a natural cycle in cloud cover forced by a well-known mode of natural climate variability: the Pacific Decadal Oscillation (PDO). While the PDO is primarily a geographic rearrangement in atmospheric and oceanic circulation patterns in the North Pacific, it is well known that such regional changes can also influence weather patterns over much larger areas...
[R]ecent satellite measurements - even though they span only 7.5 years - support the Pacific Decadal Oscillation as a potential major player in global warming and climate change."
"Global Warming as a Natural Response to Cloud Changes Associated with the Pacific Decadal Oscillation," www.drroyspencer.com, Oct. 20, 2008
Experts Individuals with PhDs, heads of government, members of federal legislative bodies, and individuals with graduate degrees and significant post-graduate involvement in fields relevant to the study of climate. [Note: Experts definition varies by site.]
Involvement and Affiliations:
Principal Research Scientist, Earth System Science Center, University of Alabama in Huntsville, 2001-present
Expert, Heartland Institute
Member, Board of Directors, George C. Marshall Institute
US Science Team leader, Advanced Microwave Scanning Radiometer flying on NASA’s Aqua satellite
Former columnist, TCS Daily
Former Senior Scientist, Climate Studies, NASA Marshall Space Flight Center
Recipient, Exceptional Scientific Achievement Medal, NASA
PhD, Meteorology, University of Wisconsin-Madison, 1981
BS, Atmospheric Sciences, University of Michigan, 1978