Estimates of spatial and interchannel observation‐error characteristics for current sounder radiances for numerical weather prediction. II: Application to AIRS and IASI data
Estimates of spatial and interchannel observation‐error characteristics for current sounder radiances for numerical weather prediction. II: Application to AIRS and IASI data
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DOI：
10.1002/qj.615
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发表时间：
2010-04
影响因子：
8.9
通讯作者：
N. Bormann;A. Collard;P. Bauer
中科院分区：
文献类型：
--
作者：
N. Bormann;A. Collard;P. Bauer
本文是由两部分组成的文章的第二部分，该文章使用三种方法来估计欧洲中期天气预报中心（ECMWF）同化系统中使用的晴空探测器辐射的观测误差及其相关性。分析是基于从首次猜测和分析偏差对得出的协方差。所使用的方法是所谓的Hollingsworth/Lönnberg方法，该方法基于从首次猜测的偏离协方差和Desroziers诊断中减去映射假设背景误差的缩放版本。本文报道了高光谱分辨率大气红外探测仪（AIRS）和红外大气探测干涉仪（IASI）的测量结果。
This article is the second part of a two‐part article that uses three methods to estimate observation errors and their correlations for clear‐sky sounder radiances used in the European Centre for Medium‐Range Weather Forecasts (ECMWF) assimilation system. The analysis is based on covariances derived from pairs of first‐guess and analysis departures. The methods used are the so‐called Hollingsworth/Lönnberg method, a method based on subtracting a scaled version of mapped assumed background errors from first‐guess departure covariances and the Desroziers diagnostic. The present article reports the results for the high‐spectral‐resolution Atmospheric Infrared Sounder (AIRS) and Infrared Atmospheric Sounding Interferometer (IASI).