| Progress in Predictability Studies in China （2003-2006） |
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| 引用本文： | 段晚锁,姜智娜,徐辉.Progress in Predictability Studies in China （2003-2006）[J].大气科学进展,2007,24(6):1086-1098. |
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| 作者姓名： | 段晚锁 姜智娜 徐辉 |
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| 作者单位： | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics，Chinese Academy of Sciences，State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences，State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029，Beijing 100081，Beijing 100029 |
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| 基金项目： | We thank three anonymousreviewers for their valuable comments. We also thank Drs. Jianping Li and Ruiqiang Ding for their preparing the partial content. This work was jointly sponsored by the National Basic Research Program of China （2006CB403606）. KZCX3-SW-230 of the Chinese Academy of Sciences, and the National Natural Scienec Foundation of China Grant （Nos. 40505013, 40675030）. |
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| 摘 要： | Since the last International Union of Geodesy and Geophysics General Assembly(2003),predictability studies in China have made significant progress.For dynamic forecasts,two novel approaches of conditional nonlinear optimal perturbation and nonlinear local Lyapunov exponents were proposed to cope with the predictability problems of weather and climate,which are superior to the corresponding linear theory.A possible mechanism for the"spring predictability barrier"phenomenon for the El Ni(?)o-Southern Oscillation (ENSO)was provided based on a theoretical model.To improve the forecast skill of an intermediate coupled ENSO model,a new initialization scheme was developed,and its applicability was illustrated by hindcast experiments.Using the reconstruction phase space theory and the spatio-temporal series predictive method, Chinese scientists also proposed a new approach to improve dynamical extended range(monthly)prediction and successfully applied it to the monthly-scale predictability of short-term climate variations.In statistical forecasts,it was found that the effects of sea surface temperature on precipitation in China have obvious spatial and temporal distribution features,and that summer precipitation patterns over east China are closely related to the northern atmospheric circulation.For ensemble forecasts,a new initial perturbation method was used to forecast heavy rain in Guangdong and Fujian Provinces on 8 June 1998.Additionally, the ensemble forecast approach was also used for the prediction of a tropical typhoons.A new downscaling model consisting of dynamical and statistical methods was provided to improve the prediction of the monthly mean precipitation.This new downsealing model showed a relatively higher score than the issued operational forecast.
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| 关 键 词： | 中国 天气预报 气候变化 可预测性 |
| 收稿时间： | 30 January 2007 |
| 修稿时间： | 2007-01-30 |
Progress in predictability studies in China (2003–2006) |
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| Duan?Wansuo,Jiang?Zhina,Xu?Hui.Progress in predictability studies in China (2003–2006)[J].Advances in Atmospheric Sciences,2007,24(6):1086-1098. |
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| Authors: | Duan Wansuo Jiang Zhina Xu Hui |
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| Institution: | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | Since the last International Union of Geodesy and Geophysics General Assembly(2003),predictability studies in China have made significant progress.For dynamic forecasts,two novel approaches of conditional nonlinear optimal perturbation and nonlinear local Lyapunov exponents were proposed to cope with the predictability problems of weather and climate,which are superior to the corresponding linear theory.A (ENSO)Was provided based on a theoretical model.To improve the forecast skill of an intermediate coupled ENSO model,a new initialization scheme was developed,and its applicability was illustrated by hindcast experiments.Using the reconstruction phase space theory and the spatio-temporal series predictive method,Chinese scientists also proposed a new approach to improve dynamical extended range(monthly) prediction and successfully applied it to the monthly-scale predictability of short-term climate variations.In statistical forecasts,it Was found that the effects of sea surface temperature on precipitation in China have obvious spatial and temporal distribution features,and that summer precipitation patterns over east China are closely related to the northern atmospheric circulation.For ensemble forecasts,a new initial perturbation method was used to forecast heavy rain in Guangdong and Fujian Provinces on 8 June 1998.Additionally,the ensemble forecast approach was also used for the prediction of a tropical typhoons.A new dowuscaling model consisting of dynamical and statistical methods was provided to improve the prediction of the monthly mean precipitation.This new downscaling model showed a relatively higher score than the issued operational forecast. |
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| Keywords: | predictability prediction perturbation weather climate |
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