Brought to You by www.SEPP.org, The Science and Environmental Policy Project
By Ken Haapala, President
McKitrick-Christy Hypothesis Test: Last week’s TWTW discussed a test on the ability of climate models (a mean of the models used) to describe a 60 year-warming of slivers a layer of the atmosphere as measured by instruments in weather balloons. The area of the atmosphere of interest is the tropical troposphere at 200 to 300 millibar, about 30,000 to 40,000 feet (9100 to 12200m). Three different radiosonde data sets are used. For the averages from the models they use all 102 model runs in the CMIP5 archive.
The Coupled Model Intercomparison Project Phase 5 (CMIP5) consisting of 20 climate modeling groups, world-wide was convened in 2008 to prepare for the Fifth Assessment Report (AR5) of the UN Intergovernmental Panel on Climate Change (IPCC)