STUDY OF THE EFFECTS OF REDUCING SYSTEMATIC ERRORS ON MONTHLY REGIONAL CLIMATE DYNAMICAL FORECAST |
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Authors: | ZENG Xin-min and XI Chao-li |
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Institution: | 1. Institute of Meteorology,PLA University of Science and Technology,Nanjing 211101 China;Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Chinese Academy of Sciences,Beijing 100029 China;Key Laboratory for Mesoscale Severe Weather of Ministry of Education,Nanjing 210093 China 2. Institute of Meteorology,PLA University of Science and Technology,Nanjing 211101 China;Air Force Meteorological Observatory of Zhangjiakou,Zhangjiakou 075000 China |
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Abstract: | A nested-model system is constructed by embedding the regional climate model RegCM3 into a
general circulation model for monthly-scale regional climate forecast over East China. The systematic
errors are formulated for the region on the basis of 10-yr (1991-2000) results of the nested-model system,
and of the datasets of the Climate Prediction Center (CPC) Merged Analysis of Precipitation (CMAP) and
the temperature analysis of the National Meteorological Center (NMC), U.S.A., which are then used for
correcting the original forecast by the system for the period 2001-2005. After the assessment of the original
and corrected forecasts for monthly precipitation and surface air temperature, it is found that the corrected
forecast is apparently better than the original, suggesting that the approach can be applied for improving
monthly-scale regional climate dynamical forecast. |
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Keywords: | climatology monthly regional climate dynamical forecast systematic errors |
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