DOI: 10.1002/jgrd.50452
论文题名: The influence of observation errors on analysis error and forecast skill investigated with an observing system simulation experiment
作者: Privé N.C. ; Errico R.M. ; Tai K.-S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5332
结束页码: 5346
语种: 英语
英文关键词: data assimilation
; observation error
; observing system simulation experiment
Scopus关键词: Experiments
; Forecasting
; NASA
; Data assimilation
; Global modeling
; Goddard earth observing systems
; Observation errors
; Observation qualities
; Observing system simulation experiments
; Root-mean square errors
; Statistical interpolation
; Quality control
; data assimilation
; error analysis
; experimental study
; extratropical environment
; forecasting method
; interpolation
; observational method
英文摘要: The National Aeronautics and Space Administration Global Modeling and Assimilation Office (NASA/GMAO) observing system simulation experiment (OSSE) framework is used to explore the response of analysis error and forecast skill to observation quality. In an OSSE, synthetic observations may be created that have much smaller error than real observations, and precisely quantified error may be applied to these synthetic observations. Three experiments are performed in which synthetic observations with magnitudes of applied observation error that vary from zero to twice the estimated realistic error are ingested into the Goddard Earth Observing System Model (GEOS-5) with Gridpoint Statistical Interpolation (GSI) data assimilation for a 1 month period representing July. The analysis increment and observation innovation are strongly impacted by observation error, with much larger variances for increased observation error. The analysis quality is degraded by increased observation error, but the change in root-mean-square error of the analysis state is small relative to the total analysis error. Surprisingly, in the 120 h forecast, increased observation error only yields a slight decline in forecast skill in the extratropics and no discernible degradation of forecast skill in the tropics. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63675
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Goddard Earth Sciences Technology and Research Center, Morgan State University, Baltimore, MD, United States; Science Systems and Applications, Inc., Greenbelt, MD, United States; Global Modeling and Assimilation Office, Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Privé N.C.,Errico R.M.,Tai K.-S.. The influence of observation errors on analysis error and forecast skill investigated with an observing system simulation experiment[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)