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| DOI | 10.1016/j.jhydrol.2024.130766 |
| The extreme lake level change and mid-summer rainfall on the Tibetan Plateau in 2015/2018 from the perspective of atmospheric circulation | |
| 发表日期 | 2024 |
| ISSN | 0022-1694 |
| EISSN | 1879-2707 |
| 起始页码 | 630 |
| 卷号 | 630 |
| 英文摘要 | Previous studies reveal robust lake expansion on TP since the late 1990s. Debate on the quantitative contribution from precipitation and other factors including glacier melting continues, but with more evidence showing that precipitation dominates the interdecadal increase in inner TP lake water storage. However, the TP lake level changes (LLCs) and the potential connection with regional precipitation at interannual timescale and the underlying atmospheric processes, especially for the extreme years, remain unclear yet. The year 2015 and 2018 witness the largest lake level decrease and increase for some major TP lakes during past decades, accompanying extreme rainfall deficit and surplus in mid-summer (July-August) in these two years, respectively. Understanding such extreme hydroclimate events over TP is of great importance for the water resource security in Asia. The central to eastern TP (CETP) is divided into 8 subregions according to the geographical locations of data available lakes and meteorological stations. The mid-summer LLCs on central TP (CTP, subregion II) are robustly and highly related with the concurrent rainfall there, while LLCs on northern central TP (subregion III) are significantly linked to the rainfall over northeastern TP (NETP, subregion VI). The extreme TP lake level decrease and corresponding rainfall deficit in 2015 is closely related to the strong anomalous water vapor divergence, which is mainly induced by weakened westerly winds. Meanwhile, strong wave propagates from the Ural Mountains and North Atlantic to TP and East Asia. In contrast, the extremely high lake level increase and rainfall surplus in 2018 is predominated by easterly winds which are related to the strengthened East Asian summer monsoon. Simultaneously, the western Pacific subtropical high becomes much stronger and extremely northwestward. The CTP rainfall deficit year composite mostly reflects the 2015 case, and NETP rainfall surplus year composite largely resembles the 2018 case, showing similar but weaker atmospheric circulation signals. |
| 英文关键词 | Tibetan Plateau; Lake level; Extreme rainfall; western Pacific subtropical high; East Asian summer monsoon; Wave activity flux |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
| WOS记录号 | WOS:001175426500001 |
| 来源期刊 | JOURNAL OF HYDROLOGY
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303984 |
| 作者单位 | Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS; Nanjing University of Information Science & Technology; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS |
| 推荐引用方式 GB/T 7714 | . The extreme lake level change and mid-summer rainfall on the Tibetan Plateau in 2015/2018 from the perspective of atmospheric circulation[J]. 中国科学院青藏高原研究所,2024,630. |
| APA | (2024).The extreme lake level change and mid-summer rainfall on the Tibetan Plateau in 2015/2018 from the perspective of atmospheric circulation.JOURNAL OF HYDROLOGY,630. |
| MLA | "The extreme lake level change and mid-summer rainfall on the Tibetan Plateau in 2015/2018 from the perspective of atmospheric circulation".JOURNAL OF HYDROLOGY 630(2024). |
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