Some critics of the scientific consensus on global warming have argued that these issues should not be linked and that reference to them constitutes an unjustified ad hominem attack.  Political scientist Roger Pielke, Jr. , responding to Mooney, has argued that science is inevitably intertwined with politics. 
Thawing permafrost alters local ecosystems, destabilizes infrastructure and releases heat-trapping gases into the atmosphere, which spurs more climate change. Read how increasing ground temperatures worsen global warming .
Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
31,487 American scientists have signed this petition, including 9,029 with PhDs For information about this project, click on the appropriate box below.
Projections suggest changes in the frequency and intensity of some extreme weather events.  Confidence in projections varies over time. 
Lower Troposphere: http:///data/msu//tlt/uahncdc_lt_
Lower Stratosphere: http:///data/msu//tls/uahncdc_ls_