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| Titel |
Stalagmite-inferred variability of the Asian summer monsoon during the penultimate glacial–interglacial period |
| VerfasserIn |
T.-Y. Li, C.-C. Shen, L.-J. Huang, X.-Y. Jiang, X.-L. Yang, H.-S. Mii, S.-Y. Lee, L. Lo |
| 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 ; 10, no. 3 ; Nr. 10, no. 3 (2014-06-24), S.1211-1219 |
| Datensatznummer |
250116987
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| Publikation (Nr.) |
 copernicus.org/cp-10-1211-2014.pdf |
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| Zusammenfassung |
| The orbital-timescale dynamics of the Quaternary Asian summer monsoons (ASM)
are frequently attributed to precession-dominated northern hemispheric summer
insolation. However, this long-term continuous ASM variability is inferred
primarily from oxygen isotope records of stalagmites, mainly from Sanbao cave
in mainland China, and may not provide a comprehensive picture of ASM
evolution. A new spliced stalagmite oxygen isotope record from Yangkou cave
tracks summer monsoon precipitation variation from 124 to 206 thousand years
ago in Chongqing, southwest China. Our Yangkou record supports that the
evolution of ASM was dominated by the North Hemisphere solar insolation on
orbital timescales. When superimposed on the Sanbao record, the precipitation
time series referred from Yangkou cave stalagmites supports the strong ASM
periods at marine isotope stages (MIS) 6.3, 6.5, and 7.1 and weak ASM
intervals at MIS 6.2, 6.4, and 7.0. This consistency confirms that ASM events
affected most of mainland China. Except for the solar insolation forcing, the
large amplitude of minimum δ18O values in Yangkou record during
glacial period, such as MIS 6.5, could stem from the enhanced prevailing
Pacific trade wind and/or continental shelf exposure in the Indo–Pacific warm
pool. |
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