Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027728 |
Decadal Transition of Moisture Sources and Transport in Northwestern China During Summer From 1982 to 2010 | |
Hua, Lijuan1; Zhong, Linhao2; Ma, Zhuguo2 | |
2017-12-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The northwestern corner of China (NWCC) experienced a decadal transition in summer precipitation during 1982-2010, with a significant upward trend in 1982-2000 (P1) but a downward one in 2001-2010 (P2). A spatially unbounded dynamic recycling model is developed to estimate the moisture sources and moisture transport variations based on ERA-Interim data. The results suggest that more than 88% of NWCC precipitation has external moisture origins in the southwest and northwest terrestrial areas. The increasing precipitation trend during P1 can be explained by the increasing moisture contribution from the southwest and decreasing contribution from the northwest. However, the opposite trends cause the decreasing precipitation trend during P2. In general, the decadal precipitation transition is mainly determined by the variation of short-distance moisture transport from central Asia, although opposite moisture transport variations exist in the Ural Mountains and Northeast Europe. The variation of the precipitation trend is closely associated with a well-organized wave train propagation from the North Atlantic to central Asia. During P1, the wave train structure consists of a titled positive phase North Atlantic Oscillation (NAO), an anticyclonic circulation over Europe, and a cyclonic anomaly over central Asia, which promotes the southwest moisture flux to NWCC. But the opposite circulation pattern dominates P2. The energy dispersion due to the breakdown of the NAO determines the phase and strength of the downstream wave anomalies over Eurasia. This suggests that the summer NAO might influence the decadal variation of NWCC precipitation through the decadal modulation of the Eurasia wave train. Plain Language Summary The precipitation in the northwestern corner of China (NWCC), which is close to central Asia, experienced an upward trend in 1982-2000 (P1) but a downward one in 2001-2010 (P2). Through tracking the water vapor sources of NWCC, we found that 88% of precipitation has external moisture origins mainly in the southwest (SW) and northwest (NW) terrestrial areas. The increasing SW with decreasing NW moisture contribution is found in P1 but the opposite found in P2. In general, the decadal trend transition of NWCC precipitation is mainly determined by the variation of short-distance moisture transport from central Asia, although opposite moisture transport variations exist in the Ural Mountains and Northeast Europe. The variation of the precipitation trend is closely associated with an atmospheric wave train propagation from the North Atlantic to central Asia. And the atmospheric circulation over the North Atlantic could indirectly determine the NWCC precipitation trend through transporting energy from the North Atlantic to central Asia. |
英文关键词 | decadal precipitation variation Northwest China moisture sources North Atlantic Oscillation atmospheric wave train |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419396500027 |
WOS关键词 | NORTH-AMERICAN MONSOON ; GLOBAL WATER CYCLE ; ATMOSPHERIC MOISTURE ; PART II ; INTERANNUAL VARIABILITY ; LAGRANGIAN ANALYSIS ; PRECIPITATION ; MODEL ; RAINFALL ; CIRCULATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32987 |
专题 | 气候变化 |
作者单位 | 1.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Hua, Lijuan,Zhong, Linhao,Ma, Zhuguo. Decadal Transition of Moisture Sources and Transport in Northwestern China During Summer From 1982 to 2010[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(23). |
APA | Hua, Lijuan,Zhong, Linhao,&Ma, Zhuguo.(2017).Decadal Transition of Moisture Sources and Transport in Northwestern China During Summer From 1982 to 2010.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(23). |
MLA | Hua, Lijuan,et al."Decadal Transition of Moisture Sources and Transport in Northwestern China During Summer From 1982 to 2010".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.23(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论