There is an excellent news article in the USA Today by Doyle Rice titled
The article reads includes my views, which I reproduced below
Another dissenting voice comes from Roger Pielke, Sr., a researcher at the Cooperative Institute for Research in Environmental Sciences in Boulder, who says that climate variability and change can occur from natural effects (for example, from the sun and volcanoes) as well as from a diverse set of human-related causes (besides carbon dioxide and other greenhouse gases), which include aerosols and land use/land cover change.
“The natural variability of the climate is also larger and more diverse than reported in the IPCC (Intergovernmental Panel on Climate Change) reports” he says.
The IPCC, a United Nations science group, claimed in 2007 that most of the increase in average global temperatures since the mid-20th century is “very likely” due to the increase in human greenhouse gas concentrations. “The recent extreme cold and snowy weather shows that we understand the climate system less than was reported in the 2007 IPCC reports,” Pielke adds.”
My view is supported by the text in the article
Just last year, a report from the National Oceanic and Atmospheric Administration’s Climate Science Investigators (CSI) team found no evidence — no human “fingerprints” — to implicate man-made climate change in the snowstorms that walloped the mid-Atlantic during the winter of 2009-10.
“If global warming was the culprit, the team would have expected to find a gradual increase in heavy snowstorms in the mid-Atlantic region as temperatures rose during the past century,” the report stated. “But historical analysis revealed no such increase in snowfall. Nor did the CSI team find any indication of an upward trend in winter precipitation along the Eastern Seaboard.”