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Wind stress over the Arabian Sea from ship reports and Seasat scatterometer dataSeasat scatterometer data over the Arabian Sea are used to build wind-stress fields during July and August 1978. They are first compared with 3-day wind analyses from ship data along the Somali coast. Seasat scatterometer specifications of 2-m/s and 20-deg accuracy are fulfilled in almost all cases. The exceptions are for winds stronger than 14 m/s, which are underestimated by the scatterometer by 15 percent. Wind stress is derived from these wind data using a bulk formula with a drag coefficient depending on the wind intensity. A successive-correction objective analysis is used to build the wind-stress field over the Arabian Sea with 2 x 2-deg and 6-day resolution. The final wind-stress fields are not significantly dependent on the objective analysis because of the dense coverage of the scatterometer. The combination of scatterometer and coastal ship data gives the best coverage to resolve monsoon wind structures even close to the coast. The final wind stress fields show wind features consistent with other monthly mean wind stress field. However, a high variability is observed on the 6-day time scale.
Document ID
Document Type
Reprint (Version printed in journal)
Perigaud, C.
(JPL, Pasadena, CA; CNES Centre Spatial de Toulouse, France)
Minster, J. F.
(CNES Centre Spatial de Toulouse, France)
Delecluse, P.
(Paris VI, Universite France)
Date Acquired
August 14, 2013
Publication Date
November 1, 1989
Publication Information
Publication: Monthly Weather Review
Volume: 117
ISSN: 0027-0644
Subject Category
Meteorology And Climatology
Distribution Limits
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