* indicates a factchecker for this edition.
| * | James Hurrell research scientist National Center for Atmospheric Research | |
| * | Ellen Mosley-Thompson professor of geography Ohio State University | |
| * | Martin Munro research scientist Laboratory of Tree-Ring Research, University of Arizona | |
| * | Jeremy A. Sabloff Mayanist and the director University of Pennsylvania Museum of Archeology and Anthropology | |
| * | Marjorie Winkler senior scientist Center for Climatic Research, University of Wisconsin-Madison |
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