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Title
Supplementary data, code, and information for ‘Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations’ (Mann et al. 1999 – the second ‘Hockey Stick’ paper [MBH99])
Date
1999
Abstract
Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and 1998 the warmest year, at moderately high levels of confidence. The 20th century warming counters a millennial-scale cooling trend which is consistent with long-term astronomical forcing.
Metadata
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Data DOI
doi:10.26208/nz6m-qn08
Researchers
Mann, M. E.
Penn State Department of Meteorology
Bradley, R. S.
University of Massachusetts
Hughes, M. K.
University of Arizona
Data Access
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References
Mann, M.E., Bradley, R.S. and Hughes, M.K., Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations, Geophysical Research Letters, 26, 759-762, 1999.