GSTDTAP  > 气候变化
DOI10.1007/s00382-018-4408-8
Differences between decadal decreases of boreal summer rainfall in southeastern and southwestern China in the early 2000s
Ha, Yao1,2,3,4,5; Zhong, Zhong1,2,3,4,5; Hu, Yijia1; Zhu, Yimin1; Zang, Zengliang1; Zhang, Yun1; Yao, Yao1; Sun, Yuan1
2019-03-01
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号52页码:3533-3552
文章类型Article
语种英语
国家Peoples R China
英文摘要

On decadal time scale, the boreal summer (June-August) rainfall over southern China significantly decreased during the epoch 2003-2012 compared to that in the preceding epoch 1993-2002. This study investigates different processes involved in the decadal decreases in summer rainfall over southeastern China (SEC) and southwestern China (SWC) since the early 2000s. Possible mechanisms for these changes are also explored. Results show that the daily total amount of rainfall in light, moderate and heavy (light and moderate) grades during 2003-2012 is significantly lower than that in the preceding period 1993-2002 by 14.4% (8.2%) over SEC (SWC) region. The epochal rainfall change caused by changes in the light, moderate and heavy (light and moderate) grades accounts for 90% (86%) of total summer rainfall difference between the epoch 1993-2002 and 2003-2012 over SEC (SWC). Based on regression and composite analyses, it is found that the reasons for decadal changes in summer rainfall in the early 2000s are different for the two regions. The rainfall decrease over SEC is attribute to reduced moisture transport by the southwesterly flow from the South China Sea, which is caused by the northward-shift of the western Pacific subtropical high (WPSH) in association with the sea surface temperature (SST) cooling over the western North Pacific (WNP) to the east of Japan. The rainfall decrease over SWC can be explained by reduced moisture transported by the southwesterly/westerly from the Bay of Bengal, which induced by the weakened South Asian monsoon since the early 2000s that is plausibly related to SST warming over the northern Indian Ocean (NIO). Furthermore, the anomalous anticyclonic circulations connected to the NIO warming and WNP cooling make a southwest-northeast-oriented high pressure band. WPSH shifts northward, extending from east of Japan to the Bay of Bengal. SEC and SWC are located along the southern flank of the dumbbell-shaped subtropical high band, where the northeasterly prevails. As a result, moisture transports from the South China Sea and the Bay of Bengal to SEC and SWC both decrease on the decadal time scale since 2003. Although different physical-dynamical processes are involved in rainfall changes over the two different regions, the summer rainfall decreases on the decadal time scale are closely related to the shifts in SSTA pattern and background atmospheric circulation on global-scale that occurred in the early 2000s.


英文关键词Summer rainfall Interdecadal decadal change Early 2000s Western North Pacific North Indian Ocean Southeast China Southwest China Northward-shifting Western Pacific tropical high
领域气候变化
收录类别SCI-E
WOS记录号WOS:000463842700058
WOS关键词WESTERN NORTH PACIFIC ; TROPICAL CYCLONE ACTIVITY ; LARGE-SCALE CIRCULATIONS ; INDIAN-OCEAN ; INTERANNUAL VARIABILITY ; TIBETAN PLATEAU ; SOUTH CHINA ; WINTER PRECIPITATION ; SST ANOMALIES ; RIVER VALLEY
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/181467
专题气候变化
作者单位1.Natl Univ Def Technol, Coll Meteorol & Oceanog, 60 Shuanglong Rd, Nanjing 211101, Jiangsu, Peoples R China;
2.Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China;
3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China;
4.Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China;
5.Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China
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GB/T 7714
Ha, Yao,Zhong, Zhong,Hu, Yijia,et al. Differences between decadal decreases of boreal summer rainfall in southeastern and southwestern China in the early 2000s[J]. CLIMATE DYNAMICS,2019,52:3533-3552.
APA Ha, Yao.,Zhong, Zhong.,Hu, Yijia.,Zhu, Yimin.,Zang, Zengliang.,...&Sun, Yuan.(2019).Differences between decadal decreases of boreal summer rainfall in southeastern and southwestern China in the early 2000s.CLIMATE DYNAMICS,52,3533-3552.
MLA Ha, Yao,et al."Differences between decadal decreases of boreal summer rainfall in southeastern and southwestern China in the early 2000s".CLIMATE DYNAMICS 52(2019):3533-3552.
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