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Recent Efforts at NCC/CMA to Develop a High Resolution CGCM for Seasonal Forecast

Recent Efforts at NCC/CMA to Develop a High Resolution CGCM for Seasonal Forecast. Yong Luo, Yihui Ding, Min Dong and Yongjia Song National Climate Center China Meteorological Administration Beijing 100081, China.

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Recent Efforts at NCC/CMA to Develop a High Resolution CGCM for Seasonal Forecast

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  1. Recent Efforts at NCC/CMA to Develop a High Resolution CGCM for Seasonal Forecast Yong Luo, Yihui Ding, Min Dong and Yongjia Song National Climate Center China Meteorological Administration Beijing 100081, China

  2.  During the recent five years, National Climate Center/China Meteorological Administration has made an effort to develop a high resolution CGCM for operational seasonal forecast purpose by support of a National Key Project of Studies on Short Term Climate Prediction System in China;  The model system has been completed at the end of 2000;  Further evaluation of the model performance is still in process. Background

  3. Assimilation System 海气耦合模式系统 Post-Processing System Global AGCM RCM Regional OGCM Global OGCM Assimilation ENSO Model Atmospheric Assimilation Oceanic Assimilation

  4. Node No. Wallclock Time (s) Speedup Ratio Efficiency 1 267.62 1 100% 2 134.24 1.99 99.5% 4 66.88 4.00 100% 8 37.09 7.22 90.3% The wallclock time and speedup ratio of paralleling version20 time steps at IBM SP

  5. AMIP-II run to validate the performance of atmospheric model AMIP-II Atmospheric Model Intercomparison Project, Phase II Jan.1979--Feb. 1996 SST and Sea Ice

  6. A daily flux anomaly coupling methodology has been applied in the coupling scheme between atmospheric and oceanic model. A 30 year’s integration of the CGCM has been finished. Validation of the performance of CGCM

  7. 500hPa height (Jan of the 26th model year)

  8. 500hPa height (Aug of the 26th model year)

  9. Precipitation (Jan of the 26th model year)

  10. Precipitation (Aug of the 26th model year)

  11. Experimental seasonal forecast by the AGCM SST: Persistent SSTA of February Initial: 00Z March 16 Period: March 16 - August 31 Forecast: Precipitation and 500 hPa height anomaly

  12. Observation of JJA 1998

  13. Forecast of JJA 1998

  14. Preliminary analyses of the model results show an ability in reasonably reproducing the current climatology and a potential in experimental seasonal forecast.

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