Climate Dynamics

, Volume 31, Issue 4, pp 389–401 | Cite as

East Asian summer monsoon simulation by a 20-km mesh AGCM

  • Akio KitohEmail author
  • Shoji Kusunoki


East Asian summer monsoon climate simulated by a global 20-km mesh atmospheric general circulation model (AGCM) forced by the global sea surface temperature during the period 1979–1998 is investigated. In comparison with a lower resolution (180-km mesh) model experiment, it is revealed that the 20-km mesh AGCM shows the superiority in simulating orographic rainfall not only its location but also its amount. The Baiu frontal structure is also better simulated in the higher resolution model, which leads to stronger Baiu rainfall. The 20-km model also shows more intense extremes in precipitation. Interannual variability of June–August mean precipitation and seasonal march of the monsoon rain band are also investigated.


East Asian climate Summer monsoon High-resolution AGCM AMIP 



The author would like to thank Dr. Ryo Mizuta and Mr. Kenji Kamiguchi for extremes indices calculation. The 20-km mesh model calculations were made on the Earth Simulator by global warming group under the framework of the “Kyosei Project 4: Development of Super High Resolution Global and Regional Climate Models” supported by the Research Revolution 2002 (RR2002) of the Ministry of Education, Sports, Culture, Science and Technology of Japan (MEXT). AK is also supported by the Global Environment Research Fund (B-062) by the Ministry of the Environment, Japan.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Meteorological Research InstituteTsukubaJapan

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