Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China
<p>Aeolus is the first satellite mission to directly observe wind profile information on a global scale. After implementing a set of bias corrections, the Aeolus data products went public on 12 May 2020. However, Aeolus wind products over China have thus far not been evaluated extensively by g...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-02-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/21/2945/2021/acp-21-2945-2021.pdf |
| _version_ | 1819142551543742464 |
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| author | J. Guo B. Liu W. Gong L. Shi Y. Zhang Y. Ma J. Zhang T. Chen K. Bai A. Stoffelen G. de Leeuw X. Xu |
| author_facet | J. Guo B. Liu W. Gong L. Shi Y. Zhang Y. Ma J. Zhang T. Chen K. Bai A. Stoffelen G. de Leeuw X. Xu |
| author_sort | J. Guo |
| collection | DOAJ |
| description | <p>Aeolus is the first satellite mission to directly observe
wind profile information on a global scale. After implementing a set of bias
corrections, the Aeolus data products went public on 12 May 2020. However,
Aeolus wind products over China have thus far not been evaluated extensively by
ground-based remote sensing measurements. In this study, the Mie-cloudy and
Rayleigh-clear wind products from Aeolus measurements are validated against
wind observations from the radar wind profiler (RWP) network in China. Based
on the position of each RWP site relative to the closest Aeolus ground
tracks, three matchup categories are proposed, and comparisons between Aeolus
wind products and RWP wind observations are performed for each category
separately. The performance of Mie-cloudy wind products does not change much
between the three matchup categories. On the other hand, for Rayleigh-clear
and RWP wind products, categories 1 and 2 are found to have much smaller
differences compared with category 3. This could be due to the RWP site
being sufficiently approximate to the Aeolus ground track for categories 1 and
2. In the vertical, the Aeolus wind products are similar to the RWP wind
observations, except for the Rayleigh-clear winds in the height range of
0–1 km. The mean absolute normalized differences between the
Mie-cloudy (Rayleigh-clear) and the RWP wind components are 3.06 (5.45),
2.79 (4.81), and 3.32 (5.72) m/s at all orbit times and ascending and
descending Aeolus orbit times, respectively. This indicates that the wind
products for ascending orbits are slightly superior to those for descending
orbits, and the observation time has a minor effect on the comparison. From
the perspective of spatial differences, the Aeolus Mie-cloudy winds are
consistent with RWP winds in most of east China, except in coastal areas
where the Aeolus Rayleigh-clear winds are more reliable. Overall, the
correlation coefficient <span class="inline-formula"><i>R</i></span> between the Mie-cloudy (Rayleigh-clear) wind and RWP
wind component observation is 0.94 (0.81), suggesting that Aeolus wind
products are in good agreement with wind observations from the RWP network
in China. The findings give us sufficient confidence in assimilating the
newly released Aeolus wind products in operational weather forecasting in
China.</p> |
| first_indexed | 2024-12-22T12:12:09Z |
| format | Article |
| id | doaj.art-d7df6f46999544e2a6783e01cb4b26e3 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-22T12:12:09Z |
| publishDate | 2021-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-d7df6f46999544e2a6783e01cb4b26e32022-12-21T18:26:16ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242021-02-01212945295810.5194/acp-21-2945-2021Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of ChinaJ. Guo0B. Liu1W. Gong2L. Shi3Y. Zhang4Y. Ma5J. Zhang6T. Chen7K. Bai8A. Stoffelen9G. de Leeuw10X. Xu11State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430019, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430019, ChinaMeteorological Observation Centre, China Meteorological Administration, Beijing 100081, ChinaMeteorological Observation Centre, China Meteorological Administration, Beijing 100081, ChinaState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430019, ChinaHubei Subsurface Multi-Scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, ChinaState Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, ChinaSchool of Geographic Sciences, East China Normal University, Shanghai 200241, ChinaRoyal Netherlands Meteorological Institute (KNMI), 3730 AE De Bilt, the NetherlandsRoyal Netherlands Meteorological Institute (KNMI), 3730 AE De Bilt, the NetherlandsChina Meteorological Administration, Beijing 100081, China<p>Aeolus is the first satellite mission to directly observe wind profile information on a global scale. After implementing a set of bias corrections, the Aeolus data products went public on 12 May 2020. However, Aeolus wind products over China have thus far not been evaluated extensively by ground-based remote sensing measurements. In this study, the Mie-cloudy and Rayleigh-clear wind products from Aeolus measurements are validated against wind observations from the radar wind profiler (RWP) network in China. Based on the position of each RWP site relative to the closest Aeolus ground tracks, three matchup categories are proposed, and comparisons between Aeolus wind products and RWP wind observations are performed for each category separately. The performance of Mie-cloudy wind products does not change much between the three matchup categories. On the other hand, for Rayleigh-clear and RWP wind products, categories 1 and 2 are found to have much smaller differences compared with category 3. This could be due to the RWP site being sufficiently approximate to the Aeolus ground track for categories 1 and 2. In the vertical, the Aeolus wind products are similar to the RWP wind observations, except for the Rayleigh-clear winds in the height range of 0–1 km. The mean absolute normalized differences between the Mie-cloudy (Rayleigh-clear) and the RWP wind components are 3.06 (5.45), 2.79 (4.81), and 3.32 (5.72) m/s at all orbit times and ascending and descending Aeolus orbit times, respectively. This indicates that the wind products for ascending orbits are slightly superior to those for descending orbits, and the observation time has a minor effect on the comparison. From the perspective of spatial differences, the Aeolus Mie-cloudy winds are consistent with RWP winds in most of east China, except in coastal areas where the Aeolus Rayleigh-clear winds are more reliable. Overall, the correlation coefficient <span class="inline-formula"><i>R</i></span> between the Mie-cloudy (Rayleigh-clear) wind and RWP wind component observation is 0.94 (0.81), suggesting that Aeolus wind products are in good agreement with wind observations from the RWP network in China. The findings give us sufficient confidence in assimilating the newly released Aeolus wind products in operational weather forecasting in China.</p>https://acp.copernicus.org/articles/21/2945/2021/acp-21-2945-2021.pdf |
| spellingShingle | J. Guo B. Liu W. Gong L. Shi Y. Zhang Y. Ma J. Zhang T. Chen K. Bai A. Stoffelen G. de Leeuw X. Xu Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China Atmospheric Chemistry and Physics |
| title | Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China |
| title_full | Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China |
| title_fullStr | Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China |
| title_full_unstemmed | Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China |
| title_short | Technical note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based radar wind profiler network of China |
| title_sort | technical note first comparison of wind observations from esa s satellite mission aeolus and ground based radar wind profiler network of china |
| url | https://acp.copernicus.org/articles/21/2945/2021/acp-21-2945-2021.pdf |
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