globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00382-018-4068-8
Scopus记录号: 2-s2.0-85040366104
论文题名:
Wet-to-dry shift over Southwest China in 1994 tied to the warming of tropical warm pool
作者: Wang L.; Huang G.; Chen W.; Zhou W.; Wang W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期:2018-07-08
起始页码: 3111
结束页码: 3123
语种: 英语
英文关键词: Decadal shift ; Drought ; Southwest China ; SST ; Tropical warm pool
Scopus关键词: atmospheric circulation ; autumn ; decadal variation ; drought ; global warming ; precipitation (climatology) ; sea surface temperature ; warm pool ; China ; Indian Ocean ; Indian Ocean (East) ; Pacific Ocean ; Pacific Ocean (Northwest) ; South China Sea
英文摘要: The autumn climate in Southwest China (SWC) experienced a notable wet-to-dry shift in 1994. Associated with this change in precipitation, decadal signatures of large-scale atmospheric circulation and SST identify a likely dynamical origin: the tropical warm pool (TWP) consisting of tropical northwest Pacific (TNWP, 3°S–12°N and 110°E–150°E) sector and tropical east Indian Ocean (TEI, 10°S–3°N and 80°E–110°E) sector. A cold-to-warm phase switch of TWP SST occurred in 1994, coinciding exactly with the timing of the regime transition of SWC precipitation. During post-1994 period, warm states in the TNWP and TEI sectors plays in a synergistic fashion to invoke dry decades in SWC. On the one side, warm SST over the TNWP sector excites an anomalous cyclone centered on the South China Sea directed opposite to the climatological moisture transport and strengthened zonal wind to its west accompanied by a weakening of the poleward flux; on the other side, warm SST over the TEI sector acts to intensify inflow into TEI with less concurrent transfer of moisture to SWC and to steer moisture to the northern Arabic Sea and away from the SWC-oriented track. Meanwhile, the troposphere over SWC is capped by subsidence, which is jointly contributed by TNWP and TEI. It then follows a reduced moisture supply, suppressed convective activity, and anomalous divergence in SWC, bringing a precipitation deficit there. In contrast, cold TWP SST during 1961–1994 favors wet conditions in SWC, given a perfectly symmetrical circulation pattern. Further, the dominant role of TWP is confirmed, because the modeled response to TWP SST forcing alone bears a great resemblance to the observed evidence. Finally, it is also found that the teleconnected influence induced by TWP is stronger in southern SWC than in northern SWC, which explains the south-north gradient of interdecadal signal of SWC precipitation. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109110
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, P.O. Box 9804, Beijing, 100029, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100190, China; Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China

Recommended Citation:
Wang L.,Huang G.,Chen W.,et al. Wet-to-dry shift over Southwest China in 1994 tied to the warming of tropical warm pool[J]. Climate Dynamics,2018-01-01,51(2018-07-08)
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