气候变化领域集成服务门户(CCPortal): Impact of Aeolus horizontal line of sight wind observations in a global NWP system

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DOI	10.1016/j.atmosres.2021.105742
	Impact of Aeolus horizontal line of sight wind observations in a global NWP system
	George G.; Halloran G.; Kumar S.; Rani S.I.; Bushair M.T.; Jangid B.P.; George J.P.; Maycock A.
发表日期	2021
ISSN	0169-8095
卷号	261
英文摘要	This study evaluates the impact of Aeolus horizontal line-of-sight (HLOS) wind observations in the National Centre for Medium Range Weather Forecasting (NCMRWF) Unified Model (NCUM) assimilation and forecast system from 20 May to 22 June 2020. The quality of both Rayleigh clear and Mie cloudy Aeolus HLOS winds are validated during the study period and found to be useful for assimilation. Observing System Experiment (OSE) and adjoint-based Forecast Sensitivity to Observation Impact (FSOI) methods are used to assess the impact of the Aeolus HLOS wind observations in the global NCUM system. The Indian Summer Monsoon onset and the life cycle of a severe cyclonic storm Nisarga formed over the eastern Arabian Sea are investigated. The FSOI study clearly shows that HLOS wind observations significantly impact the model forecast, especially over the Tropics and Southern Hemisphere extra-tropics. The impact of HLOS winds in the upper troposphere and above is more marked. Forecasts with the assimilation of the HLOS winds enhanced the circulation during the onset of the Indian summer monsoon and weakened the Monsoon Low Level Jet (MLLJ) when the Nisarga cyclone formed over the Arabian Sea. The high-resolution wind observations from Aeolus reduced the position error of the tropical cyclone Nisarga in the NCUM analysis. © 2021
英文关键词	Aeolus ALADIN HLOS wind; Forecast Sensitivity to Observation Impact; Indian Summer Monsoon onset; Northern Indian Ocean tropical cyclone; Observing system experiment
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236646
作者单位	National Centre for Medium Range Weather Forecasting, Ministry of Earth Sciences, India; Met Office, United Kingdom; India Meteorological Department, New Delhi, India
推荐引用方式 GB/T 7714	George G.,Halloran G.,Kumar S.,et al. Impact of Aeolus horizontal line of sight wind observations in a global NWP system[J],2021,261.
APA	George G..,Halloran G..,Kumar S..,Rani S.I..,Bushair M.T..,...&Maycock A..(2021).Impact of Aeolus horizontal line of sight wind observations in a global NWP system.Atmospheric Research,261.
MLA	George G.,et al."Impact of Aeolus horizontal line of sight wind observations in a global NWP system".Atmospheric Research 261(2021).