NDLI: Validation and intercomparison of HY-2A/MetOp-A/Oceansat-2 scatterometer wind products

Content Provider	Springer Nature Link
Author	Wu, Qing Chen, Ge
Copyright Year	2015
Abstract	Sea surface winds are of great significance in scientific research. In the last few years, three series of scatterometers were launched to measure these winds, including the Advanced Scatterometer (ASCAT) aboard Meteorological Operational Satellite A (MetOp-A) and MetOp-B, Oceansat-2 Scatterometer (OSCAT), and HY-2A Scatterometer (HY-2A SCAT). Based on buoy wind data, validation and intercomparison of these scatterometers were performed. Scatterometer-derived wind and buoy wind data were collected only if the spatial difference was less than 0.1 degree and temporal difference less than 5 min. After discarding wind direction data outside five times the standard deviation, ASCAT wind products showed high accuracy in both wind speed and direction, with root-mean-square error (RMSE) 0.86 m/s and 17.97 degrees, respectively. HY-2A SCAT nearly meets the mission requirement, with RMSE for wind speed 1.23 m/s and 22.85 degrees for wind direction. OSCAT had poor performance when compared with the others. RMSE for wind speed was 1.54 m/s and 39.86 degrees for wind direction, which greatly exceeds the mission requirement of 20 degrees. In addition, the RMSE for wind direction shows a high-low pattern on buoy wind speed. However, a wind speed range from 14 to 15 m/s was found to be abnormal, and the reason remains unclear. There was no systematic dependency of both wind speed and direction residuals on buoy wind speed and cross-track location of the wind vector cells across the entire range. No seasonal variation was found for any scatterometer.
Starting Page	1181
Ending Page	1190
Page Count	10
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	33
Issue Number	5
e-ISSN	19935005
Language	English
Publisher	Science Press
Publisher Date	2015-01-30
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	scatterometer wind validation intercomparison Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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