气候变化领域集成服务门户(CCPortal): Measuring Theoretical and Actual Observation Influence in the Met Office UKV: Application to Doppler Radial Winds

CCPortal

DOI	10.1029/2020GL091110
	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
推荐引用方式 GB/T 7714	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).