气候变化领域集成服务门户(CCPortal): Impact of INSAT-3D radiance data assimilation using WRF 3DVAR on simulation of Indian summer monsoon and high-resolution rainfall forecast over hilly terrain

CCPortal

DOI	10.1007/s11069-021-04833-3
	Impact of INSAT-3D radiance data assimilation using WRF 3DVAR on simulation of Indian summer monsoon and high-resolution rainfall forecast over hilly terrain
	Gogoi R.B.; Kundu S.S.; Raju P.L.N.
发表日期	2021
ISSN	0921030X
英文摘要	This study describes the impact of assimilation of INSAT-3D radiances data from both imager and sounder for Indian summer monsoon simulation and rainfall forecast over a hilly terrain using Weather Research Forecast model and its three-dimensional variational data assimilation (3DVAR) technique. The assimilation experiments conducted for the whole month of July 2016 reveal the superior impact of radiance data assimilation (DA) on analysis and forecast of the vertical profile of wind and temperature than the conventional DA experiment. Compared to the rest of the experiments, the imager DA experiment significantly improves the wind forecasts throughout the troposphere and ameliorates the temperature forecasts from 950 to 450 hPa. The sounder DA shows more improvement in the upper-level temperature forecast compared to the imager DA experiment. In addition, the spatial representation of low-level jet, temperature and moisture fields shows more relative improvement in the experiments with radiance DA than conventional DA experiments. While the impact of imager DA is superior for low-level jet forecast, the sounder DA reveals a more accurate tropospheric temperature and relative humidity forecast compared to the rest of the experiment. The rainfall forecast has also improved significantly with radiance DA over the Indian continent, mainly in India's northern, eastern and northeastern regions. Further, India’s northeastern region’s high-resolution rainfall forecast illustrates improvement using INSAT-3D radiance DA from both imager and sounder together compared to only conventional DA. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	3DVAR Imager INSAT-3D Monsoon Radiance Sounder WRF
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206241
作者单位	Department of Space, North Eastern Space Applications Center, Meghalaya, 793103, India
推荐引用方式 GB/T 7714	Gogoi R.B.,Kundu S.S.,Raju P.L.N.. Impact of INSAT-3D radiance data assimilation using WRF 3DVAR on simulation of Indian summer monsoon and high-resolution rainfall forecast over hilly terrain[J],2021.
APA	Gogoi R.B.,Kundu S.S.,&Raju P.L.N..(2021).Impact of INSAT-3D radiance data assimilation using WRF 3DVAR on simulation of Indian summer monsoon and high-resolution rainfall forecast over hilly terrain.Natural Hazards.
MLA	Gogoi R.B.,et al."Impact of INSAT-3D radiance data assimilation using WRF 3DVAR on simulation of Indian summer monsoon and high-resolution rainfall forecast over hilly terrain".Natural Hazards (2021).