期刊
EARTH AND PLANETARY SCIENCE LETTERS
卷 456, 期 -, 页码 39-46出版社
ELSEVIER
DOI: 10.1016/j.epsl.2016.09.052
关键词
East Asian monsoon region; Holocene Optimum; vegetation; seasonal insolation
资金
- Chinese Academy of Sciences [XDA11030104]
- National Basic Research Program of China [2015CB953802]
- Chinese Polar Environment Comprehensive Investigation & Assessment Programmes [CHINARE2013-04-03-07]
- Ministry of Land and Resources [201311137]
- National Science Foundation of China [41102223, 41301040, 41472149]
The East Asian summer monsoon affects precipitation and hence vegetation in the densely populated Northwest Pacific region, yet a long-standing controversy exists concerning the spatial and temporal dynamics of the Holocene Optimum (HO) in the East Asian Monsoon Region. Here we use a detailed 14,000-year record reconstructing vegetation variations from a strategically selected crater lake from Northeast China, as well as a compilation of previous paleoclimatic studies, to show that the HO began around 6,000 Cal a BP in Northeast China, significantly later than generally recognized. By comparing our paleoenvironmental data with Holocene vegetation records from other regions of East Asia, we identified a marked northward shift for the onset of the HO from similar to 10,260 Cal a BP in South China to similar to 6,000 Cal a BP in Northeast China. The gradual northward transgression of the vegetation change could be caused by both the temperature and precipitation changes in different regions. Finally, we fitted a regression model of the start of the HO period versus latitude, which allowed us to make predictions for the beginning of the HO at different geographical locations. This study reveals a strong relationship between latitude and the initiation of the HO, and provides a window towards better understanding the forcing of vegetation changes in the East Asian monsoon region. (C) 2016 Elsevier B.V. All rights reserved.
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