| 一个改进的沙尘天气数值预测系统及其模拟试验 |
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| 引用本文： | 雷航,林朝晖,孙建华.一个改进的沙尘天气数值预测系统及其模拟试验[J].气候与环境研究,2005,10(3):669-683. |
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| 作者姓名： | 雷航 林朝晖 孙建华 |
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| 作者单位： | 1. 中国科学院大气物理研究所国际气候与环境科学中心,北京,100029;中国科学院研究生院,北京,100039
2. 中国科学院大气物理研究所国际气候与环境科学中心,北京,100029 |
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| 基金项目： | 国家自然科学基金委资助项目40233027、国家财政部"西北地区土壤水分、风蚀和沙尘监测研究"项目和中国科学院知识创新方向性项目KZCX3-SW-221 |
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| 摘 要： | 在中尺度气象模式最新版本MM5V3.7的基础上,通过与一个起沙模式的耦合,建立了一个新的中国科学院大气物理研究所(IAP/CAS)沙尘天气数值预测系统(IAPS 2.0).该系统与IAP原有的沙尘天气数值预测系统(IAPS 1.0)最主要的差异在于气象模式中陆面过程模式的改进.利用改进前后两个版本的预测系统对2002年4月发生在我国北方地区的两次较强沙尘(暴)过程进行了数值模拟,并与观测实况进行了比较,结果表明改进的系统对沙尘天气的预测能力比改进前的版本有显著的改进,这主要是由于新的陆面模式改善了地表土壤湿度的模拟,进而改进了决定起沙与否的关键因子临界摩擦速度的模拟,从而提高了预测系统对起沙范围和强度的模拟效果.总的说来,采用了更为先进的Noah陆面模式的IAP沙尘(暴)天气数值预测系统对中国北方春季沙尘(暴)天气过程具有更好的模拟能力.
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| 关 键 词： | 沙尘暴 起沙机制 陆面模式 数值预测 |
| 文章编号： | 1006-9585（2005）03-0669-15 |
| 收稿时间： | 2005-08-10 |
| 修稿时间： | 2005-08-20 |
An Improved Dust Storm Prediction System and Its Simulation Experiments |
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| LEI Hang,LIN Zhao-Hui and SUN Jian-Hua.An Improved Dust Storm Prediction System and Its Simulation Experiments[J].Climatic and Environmental Research,2005,10(3):669-683. |
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| Authors: | LEI Hang LIN Zhao-Hui and SUN Jian-Hua |
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| Institution: | 1.International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; 2.Graduate School of the Chinese Academy of Sciences, Beijing 100039 |
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| Abstract: | An improved IAP integrated dust-storm prediction system(IAPS 2.0) has been developed at the Institute of Atmospheric Physics(IAP),Chinese Academy of Sciences,through the coupling of the latest version of meso-scale meteorological model(MM5V3.7) with a physical based wind erosion model.The main improvement of IAPS 2.0 over the original IAP dust-storm prediction system(IAPS 1.0) is the substitution of OSU Oregon State University land surface model with the improved Noah land surface model within MM5.Both versions of IAP dust-storm prediction system(IAPS 2.0 and IAPS 1.0) have all been employed to simulate the two typical dust-storm episodes occurred in North China during April 2002.Verification results show that the simulated dust-affected regions by IAPS 2.0 agree quite well with the observation,however,the dust-affected regions simulated by IAPS 1.0 are generally broader than the observation.Further analysis suggests that with the better representation of land surface processes,the simulation of soil moisture by IAPS 2.0 have been significantly improved,and this may lead to the improvement in simulating the threshold friction velocity,which is the key parameter for surface dust emission.In summary,with the incorporation of more advanced land surface model(Noah),the improved IAP dust-storm prediction system(IAPS 2.0) shows better capability in simulating the spring-time dust-storm activities over north part of China. |
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| Keywords: | dust storm dust emission mechanism land surface model numerical simulation |
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