Northern hemisphere temperatures during the past millennium: Inferences, uncertainties, and limitations

Details Northern hemisphere temperatures during the past millennium: Inferences, uncertainties, and limitations Northern hemisphere temperatures during the past millennium: Inferences, uncertainties, and limitations

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..759m&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 6, p. 759-762

Astronomy and Astrophysics

Astronomy

327

Global Change: Climate Dynamics, Meteorology And Atmospheric Dynamics: Paleoclimatology, Meteorology And Atmospheric Dynamics: Climatology, Oceanography: General: Paleoceanography

Scientific paper

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.

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