Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year

Eric J. Steig, David P. Schneider, Scott D. Rutherford, Michael E. Mann, Josefino C. Comiso, Drew T. Shindell

Research output: Contribution to journalArticle

447 Citations (Scopus)

Abstract

Assessments of Antarctic temperature change have emphasized the contrast between strong warming of the Antarctic Peninsula and slight cooling of the Antarctic continental interior in recent decades. This pattern of temperature change has been attributed to the increased strength of the circumpolar westerlies, largely in response to changes in stratospheric ozone. This picture, however, is substantially incomplete owing to the sparseness and short duration of the observations. Here we show that significant warming extends well beyond the Antarctic Peninsula to cover most of West Antarctica, an area of warming much larger than previously reported. West Antarctic warming exceeds 0.1°C per decade over the past 50 years, and is strongest in winter and spring. Although this is partly offset by autumn cooling in East Antarctica, the continent-wide average near-surface temperature trend is positive. Simulations using a general circulation model reproduce the essential features of the spatial pattern and the long-term trend, and we suggest that neither can be attributed directly to increases in the strength of the westerlies. Instead, regional changes in atmospheric circulation and associated changes in sea surface temperature and sea ice are required to explain the enhanced warming in West Antarctica.

Original languageEnglish (US)
Pages (from-to)459-462
Number of pages4
JournalNature
Volume457
Issue number7228
DOIs
StatePublished - Jan 22 2009

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Ice Cover
Temperature
Stratospheric Ozone
Oceans and Seas

All Science Journal Classification (ASJC) codes

  • General

Cite this

Steig, E. J., Schneider, D. P., Rutherford, S. D., Mann, M. E., Comiso, J. C., & Shindell, D. T. (2009). Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year. Nature, 457(7228), 459-462. https://doi.org/10.1038/nature07669
Steig, Eric J. ; Schneider, David P. ; Rutherford, Scott D. ; Mann, Michael E. ; Comiso, Josefino C. ; Shindell, Drew T. / Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year. In: Nature. 2009 ; Vol. 457, No. 7228. pp. 459-462.
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Steig, EJ, Schneider, DP, Rutherford, SD, Mann, ME, Comiso, JC & Shindell, DT 2009, 'Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year', Nature, vol. 457, no. 7228, pp. 459-462. https://doi.org/10.1038/nature07669

Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year. / Steig, Eric J.; Schneider, David P.; Rutherford, Scott D.; Mann, Michael E.; Comiso, Josefino C.; Shindell, Drew T.

In: Nature, Vol. 457, No. 7228, 22.01.2009, p. 459-462.

Research output: Contribution to journalArticle

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Steig EJ, Schneider DP, Rutherford SD, Mann ME, Comiso JC, Shindell DT. Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year. Nature. 2009 Jan 22;457(7228):459-462. https://doi.org/10.1038/nature07669