谱模式T63L9正规模初值化方案及试验  

A Nonlinear Normal Mode Initialization Scheme and Experiments of the Spectral Model T63L9

作　　者：付顺旗 张立凤[2] 张铭[2] 

机构地区：[1]北京2433信箱6分箱,北京100081 [2]解放军理工大学气象学院,南京211101

出　　处：《大气科学》2001年第5期661-675,共15页Chinese Journal of Atmospheric Sciences

基　　金：国家重点基础研究发展规划项目G1998040900; 国家自然科学基金资助项目49875008共同资助

摘　　要：推导了全球谱模式T63L9的正规模，对求得的垂直和水平正规模做了分析，与其他文献进行了比较。在此基础上，为其资料四维同化系统研制了一套合适的绝热非线性正规模初值化方案，并进行了一系列试验。分析表明：方案的研制是成功的，它有效地消除了模式早期积分中虚假的高频振荡，明显改进了短期预报的效果；初值化不仅对随后的一次预报有明显的改进，而且通过同化循环，提高了整个资料同化和预报的质量。A normal modes of the spectral model T63L9 are deduced, studied and compared with the results of other authors. Then a suitable adiabatic nonlinear normal mode initialization for the four--dimensional data assimilation scheme is developed, and a series of experiments have been done. The results show that the initialization scheme is successful; it has effectively removed the false high--frequency inertia--gravity oscillations in the early integration term, and evidently ameliorated the short--term forecast. Through the assimilation cycle, initialization not only improves the following fore- cast, but also advances the whole data assimilation and prediction quality.

关 键 词：谱模式 正规模 四维资料同化 高频振荡 短期预报 初值化 

分 类 号：P456.1[天文地球—大气科学及气象学]