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https://doi.org/10.5194/acp-2020-869
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-869
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  28 Aug 2020

28 Aug 2020

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Technical Note: First comparison of wind observations from ESA's satellite mission Aeolus and ground-based Radar wind profiler network of China

Jianping Guo1, Boming Liu2, Wei Gong2, Lijuan Shi3, Yong Zhang3, Yingying Ma2, Jian Zhang4, Tianmeng Chen1, Kaixu Bai5, Ad Stoffelen6, Gerrit de Leeuw6, and Xiaofeng Xu7 Jianping Guo et al.
  • 1The State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
  • 2State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan, China
  • 3Meteorological observation Centre, Chinese Meteorological Administration, Beijing 100081, China
  • 4Hubei Subsurface Multi-Scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China
  • 5School of Geographic Sciences, East China Normal University, Shanghai 200241, China
  • 6The Royal Netherlands Meteorological Institute (KNMI), 3730 AE De Bilt, The Netherlands
  • 7Chinese Meteorological Administration, Beijing 100081, China

Abstract. 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 has gone public on 12 May 2020. However, Aeolus wind products over China were thus far not evaluated by in-situ comparison. 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 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, ascending, and descending Aeolus orbit times, respectively. This indicates that the observation time has a minor effect on the comparison, and the wind products for ascending orbits is slightly superior to that for descending orbits. 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 R between Mie-cloudy (Rayleigh-clear) wind products and RWP wind component observations is 0.94 (0.81). This indicates that Aeolus wind products are in good agreement with wind observations from the radar wind profiler network in China. The findings give us sufficient confidence in assimilating the newly released Aeolus wind products in operational weather forecasting in China.

Jianping Guo et al.

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Short summary
Vertical wind profiles are crucial to a wide range of atmospheric disciplines. Aeolus is the first satellite mission to directly observe wind profile information on a global scale. However, Aeolus wind products over China were thus far not evaluated by in-situ comparison. This work is expected to let the public and science community better know the Aeolus wind products and to encourage use of these valuable data in future researches and applications.
Vertical wind profiles are crucial to a wide range of atmospheric disciplines. Aeolus is the...
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