Intercomparison of the climatological variations of Asian summer monsoon precipitation simulated by 10 GCMs
I.-S. Kang 1, K. Jin 1, B. Wang 2, K.-M. Lau 3, J. Shukla 4,
V. Krishnamurthy 4, S. D. Schubert 5, D. E. Wailser 6, W. F. Stern 7,
A. Kitoh 8, G. A. Meehl 9 , M. Kanamitsu 10, V. Ya. Galin 11,
V. Satyan 12, C.-K. Park13, and Y. Liu 14
1 School of Earth and Environment Sciences, Seoul National University, Seoul, Korea
2 International Pacific Research Center, University of Hawaii, Hawaii, U.S.A.
3 Climate and Radiation Branch, NASA/Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.
4 Center for Ocean–Land–Atmosphere Studies, Institute of Global Environment and Society, Inc., Calverton, Maryland, U.S.A.
5 Data Assimilation Office, NASA/GSFC, Greenbelt, Maryland, U.S.A.
6 Institute for Terrestrial and Planetary Atmospheres, State University of New York, Stony Brook, New York, U.S.A.
7 Geophysical Fluid Dynamics Laboratory/NOAA, Princeton University, Princeton, N.J., U.S.A.
8 Meteorological Research Institute, Tsukuba, Ibaraki, Japan
9 National Center for Atmospheric Research, Boulder, Colorado, U.S.A.
10 National Centers for Environmental Prediction, Camp Springs, Maryland, U.S.A.
11 Institute of Numerical Mathematics of Russian Academy of Sciences, Moscow, Russia
12 Indian Institute of Tropical Meteorology, Pune, India
13 Climate Prediction Division, Korea Meteorological Administration, Seoul, Korea
14 Institute of Atmospheric Physics, Beijing, People’s Republic of China
Corresponding author address: In-Sik Kang, School of Earth Environment Sciences, Seoul National University, Seoul, 151-742, Korea Email: email@example.com
Tel: 82-2-880-6718, Fax: 82-2-885-7357
This paper assesses the overall performance of state-of-the-art GCMs in simulating the climatological variations of summer monsoon rainfall over the Asian-Western Pacific region and The GCM data utilized are obtained from 10 participated in the CLIVAR/Monsoon GCM Intercomparison Project. model composite shows that the overall spatial pattern of summer monsoon rainfall is similar to the observed, although the western Pacific rainfall is relatively weak. For the simulated precipitation over the western Pacific, the models can be classified into two categories. category of models simulates the precipitation the equatorial region and weak precipitation in the subtropical western Pacific. The category of models simulates large precipitation in the subtropical western Pacific but the region is shifted to the north by 5-10 degree. None of the models realistically reproduce the observedrain bandin the region from the East China Sea to the mid Pacific. Most of the models produce rain band in the continental side of East Asia.
variations of simulated summer rainfall are examined in terms of their
amplitude and their principal EOF modes. All models simulate larger amplitudes
of the climatological seasonal variation of Indian summer monsoon than the
observed, whereas most models simulate smaller amplitudes in the western Pacific.