globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-12-00277.1
Scopus记录号: 2-s2.0-84876086247
论文题名:
A strengthened influence of ENSO on august high temperature extremes over the southern yangtze river valley since the late 1980s
作者: Hu K.; Huang G.; Wu R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期:7
起始页码: 2205
结束页码: 2221
语种: 英语
Scopus关键词: Cold horizontal temperature advection ; Decadal change ; Equatorial Indian Ocean ; High temperature ; Influence of ENSO ; North indian oceans ; Tropical Indian ocean ; Vertical motions ; Advection ; Atmospheric pressure ; Ocean currents ; Storms ; Atmospheric temperature ; air temperature ; anticyclone ; decadal variation ; El Nino ; El Nino-Southern Oscillation ; high temperature ; regional pattern ; sea surface temperature ; temperature anomaly ; Arabian Sea ; China ; Indian Ocean ; Indian Ocean (Equatorial) ; Indian Ocean (North) ; Middle East ; Yangtze River ; Yangtze Valley
英文摘要: The present study investigates the decadal change in the relationship between China high temperature extremes (HTEs) and El Niño-Southern Oscillation (ENSO). It is found that the relationship between the August HTEs in the southern Yangtze River valley (SYRV) and ENSO has strengthened since the late 1980s. Before the late 1980s, the relationship is weak, whereas, after the late 1980s, the August hot-day numbers in the SYRV region tend to be more than normal during El Niño decaying years. During 1988-2008, El Niño-induced August warm SST anomalies are mainly located in the eastern tropical and north Indian Ocean. As a response to the north Indian Ocean warming, the South Asia high extends eastward, and the SYRV is overlain by upper-level easterly anomalies. The cold horizontal temperature advection induced by upperlevel easterly anomalies leads to anomalous descent, which is conducive to the occurrence of HTEs through adiabatic warming. During 1966-86, El Niño-induced August warm SST anomalies are main y distributed in the equatorial central and southwest tropical Indian Ocean. Corresponding to the equatorial Indian Ocean warming, the ascending motion over the Arabian Sea is enhanced, which leads to an anomalous anticyclone over the Middle East through a Rossby wave-type response and in turn an anomalous cyclone over China through a midlatitude wave pattern. The SYRV is controlled by upper-level westerly anomalies, which is not conducive to the occurrence of HTEs since the corresponding horizontal temperature advection and anomalous vertical motion are weak. As such, the impact of ENSO on August SYRV HTEs is weak before the late 1980s. © 2013 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51961
Appears in Collections:气候变化事实与影响

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作者单位: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Regional Climate-Environment for East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Space and Earth Information Science, Department of Physics, Chinese University of Hong Kong, Hong Kong

Recommended Citation:
Hu K.,Huang G.,Wu R.. A strengthened influence of ENSO on august high temperature extremes over the southern yangtze river valley since the late 1980s[J]. Journal of Climate,2013-01-01,26(7)
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