Session U12 of the AGU Fall meeting (Session organizers: Gerald North, Bette Otto-Bliesner, John M. Wallace, and Ian Kraucunas[ of NRC]) has the following session description
Numerous studies concerning large-scale surface temperature reconstructions have been published over the last decade. The National Research Council recently completed a report summarizing the status of these efforts. The session invites contributions on the various types of proxy evidence and methods used to derive large-scale climate reconstructions for the past 2,000 years. Of special interest are updated proxy records or new proxy data from under-sampled regions, the spatial and temporal extent of past temperature anomalies as well as their central locations and timings, and reconstructions of solar and volcanic forcing, precipitation, or other climate variables over the past two millennia.
Abstracts are due by Sept 7. Here is my draft. Suggestions are welcome.
The report of the National Research Council (NRC) panel made several important recommendations about reconstruction methodology, including concluding that strip-bark samples (bristlecones/foxtails) should be avoided in temperature reconstructions and that non-robustness to subset selection should be considered in confidence estimation. Inconsistently, their report relied on and illustrated studies that are affected by these problems. We demonstrate the impact of implementing NRC panel recommendations on prominent reconstructions, showing that none of them provide reliable information on relative medieval-modern temperature levels.