Persistent positive north atlantic oscillation mode dominated the medieval climate anomaly

Valerie M Trouet, Jan Esper, Nicholas E. Graham, Andy Baker, James D. Scourse, David C. Frank

Research output: Contribution to journalArticle

620 Citations (Scopus)

Abstract

The Medieval Climate Anomaly (MCA) was the most recent pre-industrial era warm interval of European climate, yet its driving mechanisms remain uncertain. We present here a 947-year-long multidecadal North Atlantic Oscillation (NAO) reconstruction and find a persistent positive NAO during the MCA. Supplementary reconstructions based on climate model results and proxy data indicate a clear shift to weaker NAO conditions into the Little Ice Age (LIA). Globally distributed proxy data suggest that this NAO shift is one aspect of a global MCA-LIA climate transition that probably was coupled to prevailing La Niña-like conditions amplified by an intensified Atlantic meridional overturning circulation during the MCA.

Original languageEnglish (US)
Pages (from-to)78-80
Number of pages3
JournalScience
Volume324
Issue number5923
DOIs
StatePublished - Apr 3 2009
Externally publishedYes

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Climate
Ice
Proxy

ASJC Scopus subject areas

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Trouet, V. M., Esper, J., Graham, N. E., Baker, A., Scourse, J. D., & Frank, D. C. (2009). Persistent positive north atlantic oscillation mode dominated the medieval climate anomaly. Science, 324(5923), 78-80. https://doi.org/10.1126/science.1166349

Persistent positive north atlantic oscillation mode dominated the medieval climate anomaly. / Trouet, Valerie M; Esper, Jan; Graham, Nicholas E.; Baker, Andy; Scourse, James D.; Frank, David C.

In: Science, Vol. 324, No. 5923, 03.04.2009, p. 78-80.

Research output: Contribution to journalArticle

Trouet, VM, Esper, J, Graham, NE, Baker, A, Scourse, JD & Frank, DC 2009, 'Persistent positive north atlantic oscillation mode dominated the medieval climate anomaly', Science, vol. 324, no. 5923, pp. 78-80. https://doi.org/10.1126/science.1166349
Trouet, Valerie M ; Esper, Jan ; Graham, Nicholas E. ; Baker, Andy ; Scourse, James D. ; Frank, David C. / Persistent positive north atlantic oscillation mode dominated the medieval climate anomaly. In: Science. 2009 ; Vol. 324, No. 5923. pp. 78-80.
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