Combined forecast impact of GRACE-A and CHAMP GPS radio occultation bending angle profiles

被引：15
|
作者：
Healy, S. B. [1 ]
Wickert, J. [2 ]
Michalak, G. [2 ]
Schmidt, T. [2 ]
Beyerle, G. [2 ]
机构：
[1] European Ctr Medium Range Weather Forecasts ECMWF, Reading, Berks, England
[2] GeoForschungsZentrum Potsdam GFZ, Potsdam, Germany
来源：
ATMOSPHERIC SCIENCE LETTERS | 2007年 / 8卷 / 02期
关键词：
satellite observations; data assimilation; numerical weather prediction;
D O I：
10.1002/asl.149
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Impact experiments assimilating GRACE-A and CHAMP GPS radio occultation (GPSRO) bending angle profiles are presented. The standard deviation of the observation minus background bending angle departures above 35-km is 30% smaller for GRACE-A than CHAMP, indicating that the GRACE-A measurements are more accurate. Assimilating the GPSRO measurements improves stratospheric temperatures in the Southern Hemisphere. The combined impact of GRACE-A and CHAMP is greater than assimilating either instrument individually. Copyright (C) 2007 Royal Meteorological Society
引用
收藏
页码：43 / 50
页数：8
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