As we watch and read news stories about the coldest December in 100 years, the worst New York snow in six decades and a Sierra snow pack of 197 percent of normal, all the while getting e-mails from Al Gore declaring that 2010 was the warmest year yet, we wonder who is telling the truth? Are we seeing long term warming or cooling?
Dr Madhav L Khandekar a former research scientist from Environment Canada and an Expert Reviewer for the IPCC 2007 climate change documents was wondering as well and has written an paper for Energy and Environment: WEATHER EXTREMES OF SUMMER 2010: GLOBAL WARMING OR NATURAL VARIABILITY? He writes:
I have surveyed the cold weather extremes as reported in various TV and news media and also from various weather & climate data archives. My preliminary assessment strongly suggests increasing frequency of cold weather extrems world-wide in the last five years or more. The increasing occurrences of cold weather extremes seem to contradict the AGW hypothesis and IPCC 2007 Climate Change Documents which project ‘increasing Warm weather extremes in future’. There is an urgent need to improve our database on weather extrems, warm & cold and to assess these events in the context of present climate change debate. The climate science community has over-emphasized calculation of regional and global temperature trend and their possible linkage to human-added carbon dioxide, while ignoring analysis of weather extremes and their mechanics and dynamics.
Are cold weather extremes impacting human societies worse than warm weather extremes? There is a need to do more research on this important socio-economic issue.
The full paper is posted at Climate Science, Dr Roger Pielke Sr blog in a Guest Post by Madhav Khandekar is here.