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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: HPilot who wrote (19366)	1/3/2008 9:31:32 AM
From: Alastair McIntosh	Respond to of 36917

There are also unresolved issues with the temperature trends. consider the fact that we have only kept accurate records for a little more than that Unresolved issues with the assessment of multidecadal global land surface temperature trends We have identified a fundamental problem with the use of land surface air temperatures in the construction of a global average multi-decadal trend. The question is whether these temperatures are sufficiently coupled to the radiative and thermodynamic characteristics of the Earth system to construct a global average trend that can be diagnosed to obtain the radiative forcing of the climate system. We conclude, that particularly for the minimum temperatures, it is not sufficiently coupled! This analysis, as well as other studies such as the McKitrick and Michaels JGR paper, should be a wake up call that erroneous information is being communicated to policymakers and others on the actual radiative imbalance of the climate system. The 2007 IPCC ignored assesing these unresolved issues which, as a consequence, result in a warm bias in their conclusions on the magnitude of global warming. climatesci.colorado.edu