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Climate Change 2016
October 27-29, 2016
Volume 7, Issue 9(Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
conferenceseries .com
October 24-26, 2016 Valencia, Spain
World Conference onClimate Change
Inter-decadal changes in theEastAsian summermonsoonandassociationswith sea surface temperature
anomaly in the South Indian Ocean
Zhiping Wen
Sun Yat-sen University, China
Previous studies have revealed inter-decadal changes in the East Asian summer monsoon (EASM) that occurred around
the late 1970s and early 1990s, respectively. The present study compares characteristics of these two changes and analyzes
plausible influences of the South Indian Ocean (SIO) sea surface temperature (SST) change. The two changes share pronounced
common features, characterized by an equivalent barotropic circulation anomaly over northern East Asia and a meridional
vertical overturning circulation over the tropical region. Meanwhile, they display some distinct characteristics, especially
over the tropics. The circumfluent anomalies are more robust for the first change than for the second one. Related amplitude
asymmetry is partly attributed to a weakening trend in the EASM. Moreover, SST change in the SIO, featuring a decadal
warming since the 1980s and a cooling after 1993, may contribute to both of these inter-decadal changes. Cold SST anomaly
induces anomalous mid-tropospheric descent over the western SIO and ascent extending from the eastern SIO to Western
Australia and over the equatorial Indian Ocean. The accompanying upper-tropospheric divergent flows fromWestern Australia
and equatorial Indian Ocean to the Philippines lead to anomalous descent and an anomalous lower-tropospheric anticyclone
over the South China Sea (SCS)–Philippines. Warm SST anomaly induces opposite changes in above regions. The possible
influence of SST anomaly in the SIO is further confirmed by numerical experiments.
Biography
Zhiping Wen has completed his PhD from University of Chinese Academy of Sciences, Beijing, China. He is the Director of Center for Monsoon and Environment
Research, Sun Yat-sen University, Guangzhou, China. He has published more than 100 papers in reputed journals and has been serving as an Editorial Board
Member of repute.
Zhiping Wen, J Earth Sci Clim Change 2016, 7:9(Suppl)