DOI: 10.1007/s00382-013-1962-y
Scopus记录号: 2-s2.0-84905028792
论文题名: Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia
作者: Yang B. ; Kang S. ; Ljungqvist F.C. ; He M. ; Zhao Y. ; Qin C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-03-04 起始页码: 845
结束页码: 859
语种: 英语
英文关键词: Drought
; Palmer drought severity index
; Past climate change
; Regional climate dynamics
; The Asian summer monsoon
; Tree rings
英文摘要: The northern fringe of the Asian summer monsoon region (NASM) in China refers to the most northwestern extent of the Asian summer monsoon. Understanding the characteristics and underlying mechanisms of drought variability at long and short time-scales in the NASM region is of great importance, because present and future water shortages are of great concern. Here, we used newly developed and existing tree-ring, historical documentary and instrumental data available for the region to identify spatial and temporal patterns, and possible mechanisms of drought variability, over the past two millennia. We found that drought variations were roughly consistent in the western (the Qilian Mountains and Hexi Corridor) and eastern (the Great Bend of the Yellow River, referred to as GBYR) parts of the NASM on decadal to centennial timescales. We also identified the spatial extent of typical multi-decadal GBYR drought events based on historical dryness/wetness data and the Monsoon Asia Drought Atlas. It was found that the two periods of drought, in AD 1625-1644 and 1975-1999, exhibited similar patterns: specifically, a wet west and a dry east in the NASM. Spatial characteristics of wetness and dryness were also broadly similar over these two periods, such that when drought occurred in the Karakoram Mountains, western Tianshan Mountains, the Pamirs, Mongolia, most of East Asia, the eastern Himalayas and Southeast Asia, a wet climate dominated in most parts of the Indian subcontinent. We suggest that the warm temperature anomalies in the tropical Pacific might have been mainly responsible for the recent 1975-1999 drought. Possible causes of the drought of 1625-1644 were the combined effects of the weakened Asian summer monsoon and an associated southward shift of the Pacific Intertropical Convergence Zone. These changes occurred due to a combination of Tibetan Plateau cooling together with more general Northern Hemisphere cooling, rather than being solely due to changes in the sea surface temperature of the tropical Pacific. Our results provide a benchmark for comparing and validating paleo-simulations from general circulation model of the variability of the Asian summer monsoon at decadal to centennial timescales. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: CAS, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54327
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou, 730000 Gansu, China; Department of History, Stockholm University, Stockholm, Sweden; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
Recommended Citation:
Yang B.,Kang S.,Ljungqvist F.C.,et al. Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia[J]. Climate Dynamics,2014-01-01,43(2017-03-04)