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| Titel |
Solar-forced shifts of the Southern Hemisphere Westerlies during the Holocene |
| VerfasserIn |
V. Varma, M. Prange, F. Lamy, U. Merkel, M. Schulz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 7, no. 2 ; Nr. 7, no. 2 (2011-04-04), S.339-347 |
| Datensatznummer |
250004503
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| Publikation (Nr.) |
 copernicus.org/cp-7-339-2011.pdf |
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| Zusammenfassung |
| The Southern Hemisphere Westerly Winds (SWW) constitute an important zonal
circulation that influences large-scale precipitation patterns and ocean
circulation. Variations in their intensity and latitudinal position have
been suggested to exert a strong influence on the CO2 budget in the
Southern Ocean, thus making them a potential factor affecting the global
climate. In the present study, the possible influence of solar forcing on
SWW variability during the Holocene is addressed. It is shown that a
high-resolution iron record from the Chilean continental slope (41° S),
which is interpreted to reflect changes in the position of the SWW, is
significantly correlated with reconstructed solar activity during the past
3000 years. In addition, solar sensitivity experiments with a comprehensive
global climate model (CCSM3) were carried out to study the response of SWW to
solar variability. Taken together, the proxy and model results suggest that
centennial-scale periods of lower (higher) solar activity caused equatorward
(southward) shifts of the annual mean SWW. |
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