Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction
Fine spectral detection can basically solve the problem of low vertical resolution at the 183 GHz water-vapor absorption line, and it is expected to become one of the main methods for next-generation geostationary and polar-orbiting satellites. Here, using data from Microwave Humidity Sounder II (MW...
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MDPI AG
2023-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/17/4279 |
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| author | Yali Ju Jieying He Gang Ma Jing Huang Yang Guo Guiqing Liu Minjie Zhang Jiandong Gong Peng Zhang |
| author_facet | Yali Ju Jieying He Gang Ma Jing Huang Yang Guo Guiqing Liu Minjie Zhang Jiandong Gong Peng Zhang |
| author_sort | Yali Ju |
| collection | DOAJ |
| description | Fine spectral detection can basically solve the problem of low vertical resolution at the 183 GHz water-vapor absorption line, and it is expected to become one of the main methods for next-generation geostationary and polar-orbiting satellites. Here, using data from Microwave Humidity Sounder II (MWHS-II) onboard the Chinese Fengyun 3D (FY-3D) satellite in the Global/Regional Assimilation and Prediction System (GRAPES) Four-Dimensional Variational (4D-Var) system of the China Meteorological Administration (CMA), we explore the assimilation application of the water-vapor absorption line at 183.31 ± 1 GHz, 183.31 ± 3 GHz and 183.31 ± 7 GHz, as well as 183.31 ± 1.8 GHz and 183.31 ± 4.5 GHz, two added channels, to assess the impact of adding the 183.31 ± 1.8 GHz and 183.31 ± 4.5 GHz sampling channels on data assimilation and numerical weather prediction. Our findings reveal a significant increase in the specific-humidity increment, which in the middle–upper troposphere is numerically much larger than in the lower troposphere. Specifically, the assimilation of 183.31 ± 1.8 GHz observations, positioned near the center of the water-vapor absorption line, results in a pronounced adjustment compared with the 183.31 ± 4.5 GHz observations. And under the strong constraint of the numerical model, the Root Mean Square Error (RMSE) of the wind field diminishes more significantly (by an average of 2–4%) after assimilating the water-vapor observations at greater heights. |
| first_indexed | 2024-03-10T23:14:12Z |
| format | Article |
| id | doaj.art-3eeb664a27664d3e8887c00c72736571 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T23:14:12Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-3eeb664a27664d3e8887c00c727365712023-11-19T08:46:59ZengMDPI AGRemote Sensing2072-42922023-08-011517427910.3390/rs15174279Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather PredictionYali Ju0Jieying He1Gang Ma2Jing Huang3Yang Guo4Guiqing Liu5Minjie Zhang6Jiandong Gong7Peng Zhang8Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, ChinaKey Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, ChinaCenter for Earth System Modeling and Prediction of CMA, Beijing 100081, ChinaCenter for Earth System Modeling and Prediction of CMA, Beijing 100081, ChinaNational Satellite Meteorological Center, Beijing 100081, ChinaCenter for Earth System Modeling and Prediction of CMA, Beijing 100081, ChinaKey Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, ChinaCenter for Earth System Modeling and Prediction of CMA, Beijing 100081, ChinaNational Satellite Meteorological Center, Beijing 100081, ChinaFine spectral detection can basically solve the problem of low vertical resolution at the 183 GHz water-vapor absorption line, and it is expected to become one of the main methods for next-generation geostationary and polar-orbiting satellites. Here, using data from Microwave Humidity Sounder II (MWHS-II) onboard the Chinese Fengyun 3D (FY-3D) satellite in the Global/Regional Assimilation and Prediction System (GRAPES) Four-Dimensional Variational (4D-Var) system of the China Meteorological Administration (CMA), we explore the assimilation application of the water-vapor absorption line at 183.31 ± 1 GHz, 183.31 ± 3 GHz and 183.31 ± 7 GHz, as well as 183.31 ± 1.8 GHz and 183.31 ± 4.5 GHz, two added channels, to assess the impact of adding the 183.31 ± 1.8 GHz and 183.31 ± 4.5 GHz sampling channels on data assimilation and numerical weather prediction. Our findings reveal a significant increase in the specific-humidity increment, which in the middle–upper troposphere is numerically much larger than in the lower troposphere. Specifically, the assimilation of 183.31 ± 1.8 GHz observations, positioned near the center of the water-vapor absorption line, results in a pronounced adjustment compared with the 183.31 ± 4.5 GHz observations. And under the strong constraint of the numerical model, the Root Mean Square Error (RMSE) of the wind field diminishes more significantly (by an average of 2–4%) after assimilating the water-vapor observations at greater heights.https://www.mdpi.com/2072-4292/15/17/4279MWHS-II183 GHz water-vapor absorption linedata assimilationnumerical prediction |
| spellingShingle | Yali Ju Jieying He Gang Ma Jing Huang Yang Guo Guiqing Liu Minjie Zhang Jiandong Gong Peng Zhang Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction Remote Sensing MWHS-II 183 GHz water-vapor absorption line data assimilation numerical prediction |
| title | Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction |
| title_full | Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction |
| title_fullStr | Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction |
| title_full_unstemmed | Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction |
| title_short | Impact of the Detection Channels Added by Fengyun Satellite MWHS-II at 183 GHz on Global Numerical Weather Prediction |
| title_sort | impact of the detection channels added by fengyun satellite mwhs ii at 183 ghz on global numerical weather prediction |
| topic | MWHS-II 183 GHz water-vapor absorption line data assimilation numerical prediction |
| url | https://www.mdpi.com/2072-4292/15/17/4279 |
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