摘要
随着技术的进步,地球系统科学的发展,地——气系统的复杂性的进一步研究,对地表物理场精度的需求越来越高。而观测和模拟作为获得地表数据的两种基本手段,由于其各自的局限性,其精度已经不能满足进一步研究的需求,在这样的背景下,陆面数据同化系统逐步发展起来。本文主要介绍了世界主要的陆面数据同化系统之一——欧洲陆面数据同化系统。此系统采用的强迫数据是根据欧洲的实际情况由欧洲中心自行生产的一套数据,同时在欧洲不同的机构它们采用了不同的陆面过程作为欧洲陆面数据同化系统的核心,它们还将卡尔曼滤波和变分方法结合生产了一套独特的同化方法。并对此系统进行了验证和实例应用。
Because of the development of technology and the earth system science, and the more researches on the complexity of the land--atmosphere system, we need more precision land surface fields. As the two basic measurements, observation and simulation can not meet the requirement of the research any more because of the disadvantage of them. So the land data assimi- lation system is developed to solve the problem. This paper introduces one of the most important land data assimilation systems -- European Land Data Assimilation System （ELDAS） o The forcing data of the ELDAS is produced by ECMWF according to the situation of the Europe. And different Land Surface Models are used in different agencies of Europe. At the same time, they integrate Kalmen filter and variation assimilation into a unique system design. And this paper also introduces the validation and the case study of the ELDSA in details.
出处
《遥感信息》
CSCD
2007年第4期93-97,共5页
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