DOI: 10.1002/2017JD027697
Scopus记录号: 2-s2.0-85044867575
论文题名: Added Value of Assimilating Himawari-8 AHI Water Vapor Radiances on Analyses and Forecasts for “7.19” Severe Storm Over North China
作者: Wang Y. ; Liu Z. ; Yang S. ; Min J. ; Chen L. ; Chen Y. ; Zhang T.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 7 起始页码: 3374
结束页码: 3394
语种: 英语
英文关键词: AHI radiances
; convection-permitting
; data assimilation
; WRFDA
Scopus关键词: atmospheric convection
; data assimilation
; geostationary satellite
; instrumentation
; rainfall
; rainstorm
; severe weather
; spatiotemporal analysis
; vertical distribution
; water vapor
; China
英文摘要: Himawari-8 is the first launched and operational new-generation geostationary meteorological satellite. The Advanced Himawari Imager (AHI) on board Himawari-8 provides continuous high-resolution observations of severe weather phenomena in space and time. In this study, the capability to assimilate AHI radiances has been developed within the Weather Research and Forecasting (WRF) model's data assimilation system. As the first attempt to assimilate AHI using WRF data assimilation at convective scales, the added value of hourly AHI clear-sky radiances from three water vapor channels on convection-permitting (3 km) analyses and forecasts of the “7.19” severe rainstorm that occurred over north China during 18–21 July 2016 was investigated. Analyses were produced hourly, and 24 h forecasts were produced every 6 h. The results showed that improved wind and humidity fields were obtained in analyses and forecasts verified against conventional observations after assimilating AHI water vapor radiances when compared to the control experiment which assimilated only conventional observations. It was also found that the assimilation of AHI water vapor radiances had a clearly positive impact on the rainfall forecast for the first 6 h lead time, especially for heavy rainfall exceeding 100 mm when verified against the observed rainfall. Furthermore, the horizontal and vertical distribution of features in the moisture fields were improved after assimilating AHI water vapor radiances, eventually contributing to a better forecast of the severe rainstorm. ©2018. 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/114088
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Meteorological Disaster of Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China; National Center for Atmospheric Research, Boulder, CO, United States; Institute of Atmospheric Environment, Shenyang, China; National Meteorological Information Center, Beijing, China
Recommended Citation:
Wang Y.,Liu Z.,Yang S.,et al. Added Value of Assimilating Himawari-8 AHI Water Vapor Radiances on Analyses and Forecasts for “7.19” Severe Storm Over North China[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(7)