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AGU: Geophysical Research Letters

 

Index Terms

  • Global Change: Climate dynamics
  • Meteorology and Atmospheric Dynamics: Climatology
  • Meteorology and Atmospheric Dynamics: Paleoclimatology
  • Oceanography: General: Dendrochronology
  • Oceanography: General: Climate and interannual variability

Abstract

Global surface temperatures over the past two millennia

Michael E. Mann

Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia, USA

Philip D. Jones

Climatic Research Unit, University of East Anglia, Norwich, UK

We present reconstructions of Northern and Southern Hemisphere mean surface temperature over the past two millennia based on high-resolution ‘proxy’ temperature data which retain millennial-scale variability. These reconstructions indicate that late 20th century warmth is unprecedented for at least roughly the past two millennia for the Northern Hemisphere. Conclusions for the Southern Hemisphere and global mean temperature are limited by the sparseness of available proxy data in the Southern Hemisphere at present.

Received 24 May 2003; accepted 1 July 2003; published 14 August 2003.

Citation: Mann, M. E., and P. D. Jones (2003), Global surface temperatures over the past two millennia, Geophys. Res. Lett., 30(15), 1820, doi:10.1029/2003GL017814.

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