Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia (SCI)
文献类型：期刊论文
| 作者 | Yang B. ; Kang S. Y. ; Ljungqvist F. C. ; He M. H. ; Zhao Y. ; Qin C. |
| 刊名 | Climate Dynamics
 |
| 出版日期 | 2014 |
| 卷号 | 43期号:3-4页码:845-859 |
| 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. |
| 收录类别 | SCI |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.casnw.net/handle/362004/25024]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yang B.,Kang S. Y.,Ljungqvist F. C.,et al. Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia (SCI)[J]. Climate Dynamics,2014,43(3-4):845-859. |
| APA | Yang B.,Kang S. Y.,Ljungqvist F. C.,He M. H.,Zhao Y.,&Qin C..(2014).Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia (SCI).Climate Dynamics,43(3-4),845-859. |
| MLA | Yang B.,et al."Drought variability at the northern fringe of the Asian summer monsoon region over the past millennia (SCI)".Climate Dynamics 43.3-4(2014):845-859. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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