Moisture sources for precipitation in Southwest China in summer and the changes during the extreme droughts of 2006 and 2011
文献类型：期刊论文
| 作者 | Zhang, Chi |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 591页码:11 |
| 关键词 | Moisture source Extreme drought WAM-2layers Asian monsoons |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2020.125333 |
| 通讯作者 | Zhang, Chi(zhangchi@igsnrr.ac.cn) |
| 英文摘要 | Two record-breaking summer droughts hit Southwest China (SWC) in 2006 and 2011, causing severe losses to the society and economy. Moisture sources for precipitation in SWC and changes accompanied with the extreme droughts are thus investigated using a moisture tracking model, the Water Accounting Model-2layers (WAM-2layers), with observation-constrained data. SWC is influenced by three major circulations, namely, the Indian monsoon, the East Asian summer monsoon (EASM), and the westerlies. The representative source regions, the Southwest, Southeast, and West, contribute around 50.8 +/- 3.9, 13.3 +/- 3.8, and 16.4 +/- 2.1% of the tracked moisture climatologically. The westerlies turn out to be the second-largest moisture contributor to SWC over the EASM. In 2006 when the western Pacific subtropical high (WPSH) intruded to the west, the influence of the EASM was intensified profoundly as it increased to be the second largest contributor to contribute 21.2% of the moisture. But this change induced circulation anomalies that hindered moisture transport from the West and Southwest. Their moisture contributions were substantially reduced, resulting in an overall moisture deficit for SWC. In 2011, the contributions from subregions were universally reduced. The moisture conveyor belt in the Southwest released moisture early before it reached SWC, thus resulting in a shortage in moisture supply to SWC. The precipitation recycling ratio in SWC is around 15.7 +/- 1.9%. However, the ratio increased during both droughts to 18.6% in 2006 and 17.7% in 2011. Further analyses reveal that the external moisture decreased heavily, thus making local moisture more important to result in a marked increase in the recycling ratio. |
| WOS关键词 | TIBETAN PLATEAU ; RAINFALL EVENTS ; VARIABILITY ; CIRCULATION ; PERFORMANCE ; REANALYSES ; ANOMALIES ; FLUXES ; MODEL ; WATER |
| 资助项目 | National Key Research and Development Program of China[2018YFC1509003] ; National Key Research and Development Program of China[2018YFC1508902] ; National Natural Science Foundation of China[41701033] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA19040304] ; Research Foundation for Youth Scholars of Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000599757800049 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Research Foundation for Youth Scholars of Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/137782]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Chi |
| 作者单位 | Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, 11A Datun Rd, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chi. Moisture sources for precipitation in Southwest China in summer and the changes during the extreme droughts of 2006 and 2011[J]. JOURNAL OF HYDROLOGY,2020,591:11. |
| APA | Zhang, Chi.(2020).Moisture sources for precipitation in Southwest China in summer and the changes during the extreme droughts of 2006 and 2011.JOURNAL OF HYDROLOGY,591,11. |
| MLA | Zhang, Chi."Moisture sources for precipitation in Southwest China in summer and the changes during the extreme droughts of 2006 and 2011".JOURNAL OF HYDROLOGY 591(2020):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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