Decreasing Asian summer monsoon intensity after 1860 AD in the global warming epoch | |
Hai Xu; Yetang Hong; Bin Hong | |
2012 | |
Source Publication | Climate Dynamics
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Volume | 39Issue:7-8Pages:2079-2088 |
Abstract | The trend of the Indian summer monsoon (ISM) intensity and its nature during the past 100 and 200 years still remain unclear. In this study we reconstructed the ISM intensity during the past 270 years from tree ring δ18O at Hongyuan, eastern edge of the Tibet Plateau. The monsoon failures inferred from δ18Otree ring correlate well with those recorded in ice cores, speleothem, and historical literature sources. 22.6, 59.0, and 110.9-years frequency components in the Hongyuan δ18Otree ring series, which may be the responses to solar activities, synchronize well with those recorded in other ISM indices. A notable feature of the reconstructed ISM intensity is the gradually decreasing trend from about 1860 to the present, which is inversely related to the increasing temperature trend contemporaneously. Such “decreasing ISM intensity–increasing temperature” tendency can also be supported by ice core records and meteorological records over a wide geographic extension. The decrease in sea surface temperature gradient between tropical and north Indian Ocean, and the decrease in land-sea thermal contrast between tropical Indian Ocean and “Indian sub-continent–western Himalaya” are possibly responsible for the observed decreasing ISM trend. |
Keyword | Hongyuan tree Ring d18o Indian Summer Monsoon |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/11008 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Fenghui South Road, #10, High Tech Zone, Xi’an 710075, Shaanxi Province, China 2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China |
Recommended Citation GB/T 7714 | Hai Xu;Yetang Hong;Bin Hong. Decreasing Asian summer monsoon intensity after 1860 AD in the global warming epoch[J]. Climate Dynamics,2012,39(7-8):2079-2088. |
APA | Hai Xu;Yetang Hong;Bin Hong.(2012).Decreasing Asian summer monsoon intensity after 1860 AD in the global warming epoch.Climate Dynamics,39(7-8),2079-2088. |
MLA | Hai Xu;Yetang Hong;Bin Hong."Decreasing Asian summer monsoon intensity after 1860 AD in the global warming epoch".Climate Dynamics 39.7-8(2012):2079-2088. |
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