Review of the U.S. Climate Change Science Program's Synthesis and Assessment Product on Temperature Trends in the Lower Atmosphere (2005) / Chapter Skim
Currently Skimming:
Review of the Executive Summary
Review of the Executive Summary
Pages 6-10
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 6... ...
MAJOR COMMENTS 1. A possible strategy to structure the Executive Summary is to bring forward key bullet points from each chapter as answers to the six main chapter questions, followed by brief explanatory text, key figures, and implications for understanding within each chapter.
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From page 7... ...
, it seems that the data can neither reject nor confirm the hypothesis that the models are in some sense reliable. The Executive Summary focuses almost exclusively on the 1979-1999 period, a rather short period for which the trends discussed would not be significant at the 5% level, if the significance testing were done in the usual way.
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From page 8... ...
It seems that additional analysis or logic is being applied m the Executive Summary that is not present m the supporting chapters, suggesting a lack of traceability between the major conclusions of the Executive Summary and the supporting chapters. A number of critical decisions were made about which data sets to include and exclude and whether or not to show sampling uncertamly.
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From page 9... ...
If they are not known, then that is important too. Throughout the Executive Summary, the reader is invited to take the values presented literally, even though they may have very large statistical uncertainty in addition to residual structural uncertainty.
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From page 10... ...
For example, it is not clear that Chapter 6 calls for "efforts to better understand and reconcile differences between climate data records that purport to measure the same variable," the second of the specific recommendations listed on page 32 of the Temperature Trends report. More specific recommendations that could immediately be acted upon could be to initiate an action to determine whether the RSSUAH MSU discrepancy can be resolved or to better characterize the instrumental contribution to the radiosonde trends.
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