Reversal of decadal trend in West China autumn rainfall in the late 1990s and possible causes

被引：2
作者：
Deng, Huan [1 ,3 ]
Hua, Wei [1 ,2 ]
Ming, Jing [1 ]
Zhang, Yu [1 ]
Fan, Guangzhou [1 ]
机构：
[1] Chengdu Univ Informat Technol, Coll Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Prov, Sch Atmospher Sci Plateau Atmosphere & Environm,Me, Chengdu 610225, Sichuan, Peoples R China
[2] Chinese Acad Sci, Inst Atmospher Phys, Nansen Zhu Int Res Ctr, Beijing 100029, Peoples R China
[3] Zigong Meteorol Bur, Zigong 643000, Peoples R China
来源：
ATMOSPHERIC RESEARCH | 2023年 / 294卷
基金：
中国国家自然科学基金;
关键词：
West China autumn rainfall; Decadal reversal; Atmospheric circulation; Sea surface temperature; SEA-SURFACE TEMPERATURE; INTERANNUAL VARIABILITY; ENSO; PRECIPITATION; TELECONNECTION; ASSOCIATION; IMPACTS; CLIMATE;
D O I：
10.1016/j.atmosres.2023.106984
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
As a complex regional weather and climate phenomenon in China, the highly variable West China autumn rainfall (WCAR) causes severe flooding and related disasters that can have major impacts on socioeconomic and environmental sustainability. This study investigated both the reversal of the decadal trend in the WCAR during 1961-2020 and the related atmospheric circulation and oceanic backgrounds. The results showed that the decadal trend in the WCAR underwent distinct reversal in the late 1990s, with a significant trend of decline (increase) before (after) this reversal, which was directly linked to variations in the large-scale Eurasian atmospheric circulation, local moisture transport and dynamic conditions, and sea surface temperature (SST) in the subtropical South Pacific. Further investigation indicated that reduced sea level pressure over Asia, an enhanced European blocking high, and a deepened Lake Balkhash trough during the latter period favored southward movement of high-latitude cold air into West China. Moreover, a stronger southerly flow in the southern West China was observed in the latter period, which tended to transport more moisture from low-latitude ocean areas. Northward displacement of the East Asian jet (EAJ) also played a strong dynamic role in the reversal of the WCAR trend. Additionally, the reversal of the decadal trend in WCAR might also be attributed to a change in the trend of SST in the subtropical South Pacific from warming to cooling in the late 1990s. This resulted in southward displacement of the EAJ, which generated an anomalous descent and reduction in the WCAR.
引用
收藏
页数：12
相关论文
共 40 条
[31]   A shift in the upper-ocean temperature trends in the South China Sea since the late 1990s [J].
Zhaoyun Wang ;
Fangguo Zhai ;
Peiliang Li .
Acta Oceanologica Sinica, 2016, 35 :44-51
[32]   A shift in the upper-ocean temperature trends in the South China Sea since the late 1990s [J].
Wang Zhaoyun ;
Zhai Fangguo ;
Li Peiliang .
ACTA OCEANOLOGICA SINICA, 2016, 35 (11) :44-51
[33]   Weakening of the El Nino amplitude since the late 1990s and its link to decadal change in the North Pacific climate [J].
Xu, Kang ;
Wang, Weiqiang ;
Liu, Boqi ;
Zhu, Congwen .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019, 39 (10) :4125-4138
[34]   The Enhancing Effect of the East Asian Subtropical Westerly Jet on Summer Extreme High-Temperature Events over Central-Eastern China Since the Late 1990s [J].
Gao, Chujie ;
Niu, Yuyu ;
Li, Gen ;
Sun, Shanlei ;
Lu, Bo ;
Li, Chaofan ;
Xu, Bei ;
Huang, Jinglong ;
Sun, Xiubao .
ADVANCES IN ATMOSPHERIC SCIENCES, 2025, 42 (03) :453-466
[35]   Decadal change of South China Sea tropical cyclone activity in mid-1990s and its possible linkage with intraseasonal variability [J].
Ha, Yao ;
Zhong, Zhong ;
Sun, Yuan ;
Lu, Wei .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2014, 119 (09) :5331-5344
[36]   Change in the relationship between the Australian summer monsoon circulation and boreal summer precipitation over Central China in the late 1990s [J].
Yang, Ruowen ;
Wang, Jian ;
Zhang, Tianyu ;
He, Shengping .
METEOROLOGY AND ATMOSPHERIC PHYSICS, 2019, 131 (01) :105-113
[37]   On the weakening relationship between the South China Sea summer monsoon onset and cross-equatorial flow after the late 1990s [J].
Hu, Peng ;
Chen, Wen ;
Huang, Ruping ;
Nath, Debashis .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2018, 38 (07) :3202-3208
[38]   Reduction of mid-summer rainfall in northern India after the late-1990s induced by the decadal change of the Silk Road pattern [J].
Wang, Xi ;
Lu, Riyu ;
Hong, Xiaowei .
ENVIRONMENTAL RESEARCH LETTERS, 2021, 16 (10)
[39]   Interdecadal change of summer precipitation over Eastern China around the late-1990s and associated circulation anomalies, internal dynamical causes [J].
Huang RongHui ;
Liu Yong ;
Feng Tao .
CHINESE SCIENCE BULLETIN, 2013, 58 (12) :1339-1349
[40]   Effect of Warm SST in the Subtropical Eastern North Pacific on Triggering the Abrupt Change of the Mei-Yu Rainfall over South China in the Early 1990s [J].
Wu, Yi-Kai ;
Huang, An-Yi ;
Wu, Chia-Kai ;
Hong, Chi-Cherng ;
Chang, Chi-Chun .
JOURNAL OF CLIMATE, 2020, 33 (02) :657-673
1234