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DOI10.1029/2020GL091110
Measuring Theoretical and Actual Observation Influence in the Met Office UKV: Application to Doppler Radial Winds
Fowler A.M.; Simonin D.; Waller J.A.
发表日期2020
ISSN 0094-8276
卷号47期号:24
英文摘要In numerical weather prediction it is important to objectively measure the value of the observations assimilated. However, methods such as the forecast sensitivity to observation impact and observing system experiments are difficult to apply to convective scale data assimilation (DA) systems such as the Met Office's UK Variable-resolution model (UKV). We develop a new method to estimate the influence of the observations on the analysis, acknowledging that the influence depends not only on the uncertainty in the observations and prior, but how well these are prescribed in the assimilation. Monitoring both the actual and theoretical observation influence can flag observations that are being assimilated incorrectly and quantify the harm caused to the analysis. By applying these new estimates of the observation influence to the assimilation of Doppler Radial Winds in the UKV system, we demonstrate their ability, along with expert knowledge, to inform the optimization of both the observation network and DA system. © 2020. The Authors.
英文关键词Weather forecasting; Data assimilation; Doppler radial wind; Forecast sensitivity; Numerical weather prediction; Observation impacts; Observation networks; Observing system experiments; Variable resolution modeling; Uncertainty analysis; data assimilation; expert system; numerical model; optimization; prediction; weather forecasting; weather station
语种英语
来源期刊Geophysical Research Letters
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/169286
作者单位Department of Meteorology, University of Reading, Reading, United Kingdom; National Centre for Earth Observation, University of Reading, Reading, United Kingdom; MetOffice@Reading, Reading, United Kingdom
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Fowler A.M.,Simonin D.,Waller J.A.. Measuring Theoretical and Actual Observation Influence in the Met Office UKV: Application to Doppler Radial Winds[J],2020,47(24).
APA Fowler A.M.,Simonin D.,&Waller J.A..(2020).Measuring Theoretical and Actual Observation Influence in the Met Office UKV: Application to Doppler Radial Winds.Geophysical Research Letters,47(24).
MLA Fowler A.M.,et al."Measuring Theoretical and Actual Observation Influence in the Met Office UKV: Application to Doppler Radial Winds".Geophysical Research Letters 47.24(2020).
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