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Impact of GPM Rainrate Data Assimilation on Simulation of Hurricane Harvey (2017)Built upon Tropical Rainfall Measuring Mission (TRMM) legacy for next-generation global observation of rain and snow. The GPM was launched in February 2014 with Dual-frequency Precipitation Radar (DPR) and GPM Microwave Imager (GMI) onboard. The GPM has a broad global coverage approximately 70deg S -70deg N with a swath of 245/125-km for the Ka (35.5 GHz)/Ku (13.6 GHz) band radar, and 850-km for the 13-channel GMI. GPM also features better retrievals for heavy, moderate, and light rain and snowfall To develop methodology to assimilate GPM surface precipitation data with Grid-point Statistical Interpolation (GSI) data assimilation system and WRF ARW model To investigate the potential and the value of utilizing GPM observation into NWP for operational environment The GPM rain rate data has been successfully assimilated using the GSI rain data assimilation package. Impacts of rain rate data have been found in temperature and moisture fields of initial conditions. 2.Assimilation of either GPM IMERG or GPROF rain product produces significant improvement in precipitation amount and structure for Hurricane Harvey (2017) forecast. Since IMERG data is available half-hourly, further forecast improvement is expected with continuous assimilation of IMERG data
Document ID
20180000605
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
Li, Xuanli
(Alabama Univ. Huntsville, AL, United States)
Srikishen, Jayanthi
(Universities Space Research Association Huntsville, AL, United States)
Zavodsky, Bradley
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Mecikalski, John
(Alabama Univ. Huntsville, AL, United States)
Date Acquired
January 17, 2018
Publication Date
January 7, 2018
Subject Category
Earth Resources And Remote Sensing
Meteorology And Climatology
Report/Patent Number
MSFC-E-DAA-TN51235
Meeting Information
Meeting: 2018 American Meteorological Society Annual Meeting
Location: Austin, TX
Country: United States
Start Date: January 7, 2018
End Date: January 11, 2018
Sponsors: American Meteorological Society
Funding Number(s)
CONTRACT_GRANT: NNX14AG22G
CONTRACT_GRANT: 80MSFC17M0022
CONTRACT_GRANT: NNM11AA01A
WBS: WBS 281945
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Precipitation
Data Assimilation
Numerical Weather Predictio
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