Variational bias correction of satellite radiance data in the ERA-Interim reanalysis
Variational bias correction of satellite radiance data in the ERA-Interim reanalysis
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DOI：
10.1002/qj.493
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发表时间：
2009-10-01
影响因子：
8.9
通讯作者：
Uppala, S.
中科院分区：
文献类型：
--
作者：
Dee, D. P.;Uppala, S.
本文描述了卫星辐射数据的变分偏差改正系统在ERA-TERTER中的性能，并考虑了在再分析中对气候信号表示的影响。我们简要回顾了该方法的公式及其在重新分析中首次引入新可用的卫星传感器的辐射测量时自动进行偏差估计的能力。然后，我们介绍了从ERA-中期的前19年(1989-2007年)获得的几个结果。这些工作包括确定微波探测单元(MSU)仪器校准误差、该系统对1991年皮纳图博喷发的反应，以及探测对流层AMSU-A数据偏差的长期漂移。我们发现，我们的结果支持这样一个概念，即全球再分析为气候监测提供了一个适当的框架。版权所有(C)2009皇家气象学会
This article describes the performance of the variational bias correction system for satellite radiance data in ERA-Interim, and considers implications for the representation of climate signals in reanalysis. We briefly review the formulation of the method and its ability to automatically develop bias estimates when radiance measurements from newly available satellite sensors are first introduced in the reanalysis. We then present several results obtained from the first 19 years (1989-2007) of ERA-Interim. These include the identification of Microwave Sounding Unit (MSU) instrument calibration errors, the response of the system to the Pinatubo eruption in 1991, and the detection of a long-term drift in biases of tropospheric AMSU-A data. We find that our results support the notion that global reanalysis provides an appropriate framework for climate monitoring. Copyright (C) 2009 Royal Meteorological Society