NDLI: Signals of the South China Sea summer rainfall variability in the Indian Ocean

Content Provider	Springer Nature Link
Author	He, Zhuoqi Wu, Renguang Wang, Weiqiang
Copyright Year	2015
Abstract	The present study investigates signals of the South China Sea (SCS) summer rainfall variability in the Indian Ocean. It is found that the SCS summer rainfall has a negative relationship with December–January–February (DJF) western-equatorial Indian Ocean (WIO) sea surface temperature (SST), a positive relationship with an asymmetric mode of precipitation anomalies in the tropical Indian Ocean during March–April–May (MAM), and a positive relationship with June–July–August (JJA) South Indian Ocean (SIO) SST. The WIO SST anomalies induce same-sign southeast Indian Ocean SST anomalies through an anomalous zonal vertical circulation. The southeast Indian Ocean SST anomalies last from late winter to early summer and induce opposite-sign SCS summer rainfall anomalies via an anomalous meridional vertical circulation. The asymmetric mode influences the SCS summer rainfall variation via the North Indian Ocean (NIO) SST anomalies with significant cloud–radiation and wind–evaporation effect. Positive (negative) SIO SST anomalies drive an anomalous direct circulation between the SIO and the NIO, and an anomalous indirect circulation between the NIO and the SCS which facilitates the occurrence of cyclonic (anti–cyclonic) wind anomalies over the SCS–western North Pacific and results in positive (negative) SCS summer rainfall anomalies. Partial correlation analysis indicates that the influence of DJF WIO SST anomalies and JJA SIO SST anomalies on the SCS summer rainfall is partly ENSO-independent, while the MAM asymmetric mode is mostly related to the preceding DJF eastern Pacific SST anomalies.
Starting Page	3181
Ending Page	3195
Page Count	15
File Format	PDF
ISSN	09307575
Journal	Climate Dynamics
Volume Number	46
Issue Number	9-10
e-ISSN	14320894
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-07-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	South China Sea summer rainfall Winter western-equatorial Indian Ocean SST Spring asymmetric mode Summer South Indian Ocean SST CESM–CAM Geophysics/Geodesy Climatology Oceanography
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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