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Influences of the Indian Ocean dipole on the Asian summer monsoon in the following year

  1. Yuan Yuan1,2,*,
  2. Hui Yang1,
  3. Wen Zhou3,
  4. Chongyin Li1

Article first published online: 13 FEB 2008

DOI: 10.1002/joc.1678

Issue

International Journal of Climatology

International Journal of Climatology

Volume 28, Issue 14, pages 1849–1859, 30 November 2008

Additional Information

How to Cite

Yuan, Y., Yang, H., Zhou, W. and Li, C. (2008), Influences of the Indian Ocean dipole on the Asian summer monsoon in the following year. Int. J. Climatol., 28: 1849–1859. doi: 10.1002/joc.1678

Author Information

  1. 1

    LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

  2. 2

    Graduate School of Chinese Academy of Sciences, Beijing, China

  3. 3

    Department of Physics and Materials Science, City University of Hong Kong, Hong Kong

*LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, P.O. Box 9804, Beijing, China, 100029.

Publication History

  1. Issue published online: 22 OCT 2008
  2. Article first published online: 13 FEB 2008
  3. Manuscript Accepted: 1 DEC 2007
  4. Manuscript Revised: 15 NOV 2007
  5. Manuscript Received: 17 NOV 2005

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Keywords:

  • Indian Ocean dipole;
  • South China sea summer monsoon;
  • Asian summer monsoon;
  • positive phase;
  • negative phase

Abstract

By exploring the spatiotemporal features of the Indian Ocean Dipole (IOD) both on the sea surface and in the subsurface ocean, the present article reveals that the subsurface dipole mode, with larger amplitude than the surface one, is likely to prolong the dipole signal for a long time.

Using the wind and geopotential height data from NCEP/NCAR, this article further investigates IOD impacts on the Asian summer monsoon activities in the following year. A normal (late) South China Sea summer monsoon onset is associated with the previous positive (negative) IOD. In the summer after an IOD year, a positive (negative) IOD tends to induce a stronger (weaker) 100-hPa South Asian High, with a more (less) eastward-extending high ridge, and also an enhanced (a weakened) 500-hPa western Pacific subtropical high, with a westward-advancing (an eastward-retreating) high ridge. Influenced by the anomalous 850-hPa Asian monsoon circulations and the longitudinal position of the 500-hPa subtropical high ridge, summer rainfall in China also exhibits different patterns corresponding to different phases of the IOD in the previous year. Copyright © 2008 Royal Meteorological Society

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