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

Northern hemisphere temperatures during the past millennium: Inferences, uncertainties, and... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

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

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Publisher
Wiley
Copyright
© 1999 by the Chinese Geophysical Society
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/1999GL900070
Publisher site
See Article on Publisher Site

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.

Journal

Geophysical Research LettersWiley

Published: Mar 15, 1999

References

  • Milankovitch theory and climate
    Berger, Berger
  • Comparison of proxy records of climate change and solar forcing
    Crowley, Crowley; Kim, Kim
  • Reconstruction of solar irradiance since 1610: Implications for climate change
    Lean, Lean; Beer, Beer; Bradley, Bradley

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