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Enhanced signature of solar variability in Eurasian winter climate

Woollings, T., Lockwood, M., Masato, G., Bell, C. and Gray, L. (2010) Enhanced signature of solar variability in Eurasian winter climate. Geophysical Research Letters, 37. L20805. ISSN 0094-8276

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To link to this article DOI: 10.1029/2010GL044601

Abstract/Summary

We demonstrate that a new geomagnetic index of solar variability exhibits stronger correlations with atmospheric circulation variations than conventional measures. The circulation anomalies are particularly enhanced over the North Atlantic / Eurasian sector, where there are large changes in the occurrence of blocking and the winter mean surface temperature differs by several degrees between high- and low-solar terciles. The relationship is also simpler, being largely linear between high- and low-solar winters. While the circulation anomalies strongly resemble the North Atlantic Oscillation they also extend deeper into Eurasia, in a distinct signature which may be useful for the detection and attribution of observed changes and also the identification of dynamical mechanisms.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical and Physical Sciences > Department of Meteorology
ID Code:7486
Publisher:American Geophysical Union

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