Balanced tropical data assimilation based on a study of equatorial waves in ECMWF short‐range forecast errors
Balanced tropical data assimilation based on a study of equatorial waves in ECMWF short‐range forecast errors
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基于ECMWF短期预报误差中赤道波研究的平衡热带资料同化
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Fisher
中科院分区：
文献类型：
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作者：
N. Žagar;E. Andersson;M. Fisher
本文试图用赤道波来表示欧洲中期天气预报中心（ECMWF）模式的热带短期预报误差协方差。进行这项研究的动机是越来越多的观测证据表明，热带大尺度变化的很大一部分可以用浅水理论中已知的赤道陷波解来解释。来自数据同化集合的短期预报差异被用作背景误差的代理。
This paper seeks to represent the tropical short‐range forecast error covariances of the European Centre for Medium‐RangeWeather Forecasts (ECMWF) model in terms of equatorial waves. The motivation for undertaking this investigation is increasing observational evidence indicating that a substantial fraction of the tropical largescale variability can be explained by equatorially trapped wave solutions known from shallow‐water theory. Shortrange forecast differences from a data‐assimilation ensemble were taken to serve as a proxy for background errors.