The Characteristics of the Indian Monsoon: Evidences from the Sedimentary Records of Tengchong and Shangri-La over the Past 60 ka
详细信息
- 责任者：Fang Nianqiao (School of Ocean Sciences ; China University of Geosciences ; Beijing 100083 ; China) ; Bao Rui
- 刊名：Earth Science Frontiers
- 出版年：2009
- 卷期：16(6)
- 关键词：沉积环境 ; sedimentary environment ; 古季风 ; palaeomonsoon ; 云南 ; Yunnan Province
- 页码：p.177-185
- 图表：4 illus., 1 table, 23 refs.
- 分类号：1400
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
On the basis of correlating some significant proxies, such as TOC, δ13C , grain-size and pollen data, from the Napahai Lake , Shangri-la and the Beihai wetland, Tengchong, and referring the sedimentary rhythm and δ18O record since 60 ka BP from the Bay of Bengal , we found that all of them have been closely affected by the Indian monsoon system. The authors deduced from the correlation between the continental deposit and marine deposit that the control of the regional climatic event originated from the land side rather than the sea side during the late MIS3. It is likely that an extreme warming up at that phase at the Tibetan Plateau, which resulted in the decline of the Indian winter monsoon and other changes of the atmospheric circulation, was responsible for the event. The geomorphologic configuration played an important role in the monsoonal precipitation as well.