Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case
The dynamic emissivity retrieved from window channels of the microwave humidity sounder II (MWHS-2) onboard the China Meteorological Administration’s FengYun (FY)-3C polar orbiting satellite can provide more realistic emissivity over lands and potentially improve the numerical weather prediction (NW...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2021/6427620 |
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| author | Keyi Chen Jiao Fan Zhipeng Xian |
| author_facet | Keyi Chen Jiao Fan Zhipeng Xian |
| author_sort | Keyi Chen |
| collection | DOAJ |
| description | The dynamic emissivity retrieved from window channels of the microwave humidity sounder II (MWHS-2) onboard the China Meteorological Administration’s FengYun (FY)-3C polar orbiting satellite can provide more realistic emissivity over lands and potentially improve the numerical weather prediction (NWP) forecasts. However, whether the assimilation with the dynamic emissivity works for the precipitation forecasts over the complex geography is less investigated. In this paper, a typical precipitating case generated by the Southwest Vortex is selected and the Weather Research and Forecasting data assimilation (WRFDA) system is applied to examine the impacts of assimilating MWHS-2/FY-3C with the uses of the emissivity atlas and the dynamic emissivity on the forecasts. The results indicate that the use of the dynamic emissivity retrieved from the 89 GHz channel of MWHS-2/FY-3C apparently increases the used data number for assimilation and does improve the initial fields and the 24-hour forecasts (from 0000 UTC 24 June 2016 to 0000 UTC 25 June 2016) of precipitation distribution and intensity except for the rainfall over 100 mm. But these positive impacts are not evidently better than those with the emissivity atlas. In general, these results still suggest that the future use of the dynamic emissivity in the assimilation over the complex terrain is promising. |
| format | Article |
| id | doaj-art-062660457cf54140b959c0166b850695 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-062660457cf54140b959c0166b8506952025-02-03T01:07:07ZengWileyAdvances in Meteorology1687-93091687-93172021-01-01202110.1155/2021/64276206427620Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex CaseKeyi Chen0Jiao Fan1Zhipeng Xian2School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, ChinaSchool of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, ChinaSchool of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, ChinaThe dynamic emissivity retrieved from window channels of the microwave humidity sounder II (MWHS-2) onboard the China Meteorological Administration’s FengYun (FY)-3C polar orbiting satellite can provide more realistic emissivity over lands and potentially improve the numerical weather prediction (NWP) forecasts. However, whether the assimilation with the dynamic emissivity works for the precipitation forecasts over the complex geography is less investigated. In this paper, a typical precipitating case generated by the Southwest Vortex is selected and the Weather Research and Forecasting data assimilation (WRFDA) system is applied to examine the impacts of assimilating MWHS-2/FY-3C with the uses of the emissivity atlas and the dynamic emissivity on the forecasts. The results indicate that the use of the dynamic emissivity retrieved from the 89 GHz channel of MWHS-2/FY-3C apparently increases the used data number for assimilation and does improve the initial fields and the 24-hour forecasts (from 0000 UTC 24 June 2016 to 0000 UTC 25 June 2016) of precipitation distribution and intensity except for the rainfall over 100 mm. But these positive impacts are not evidently better than those with the emissivity atlas. In general, these results still suggest that the future use of the dynamic emissivity in the assimilation over the complex terrain is promising.http://dx.doi.org/10.1155/2021/6427620 |
| spellingShingle | Keyi Chen Jiao Fan Zhipeng Xian Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case Advances in Meteorology |
| title | Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case |
| title_full | Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case |
| title_fullStr | Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case |
| title_full_unstemmed | Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case |
| title_short | Assimilation of MWHS-2/FY-3C 183 GHz Channels Using a Dynamic Emissivity Retrieval and Its Impacts on Precipitation Forecasts: A Southwest Vortex Case |
| title_sort | assimilation of mwhs 2 fy 3c 183 ghz channels using a dynamic emissivity retrieval and its impacts on precipitation forecasts a southwest vortex case |
| url | http://dx.doi.org/10.1155/2021/6427620 |
| work_keys_str_mv | AT keyichen assimilationofmwhs2fy3c183ghzchannelsusingadynamicemissivityretrievalanditsimpactsonprecipitationforecastsasouthwestvortexcase AT jiaofan assimilationofmwhs2fy3c183ghzchannelsusingadynamicemissivityretrievalanditsimpactsonprecipitationforecastsasouthwestvortexcase AT zhipengxian assimilationofmwhs2fy3c183ghzchannelsusingadynamicemissivityretrievalanditsimpactsonprecipitationforecastsasouthwestvortexcase |