Analysis of sea surface salinity response to typhoon in the Northwest Pacific based on Argo data

doi:10.3969/j.issn.1001-909X.2015.03.001

Abstract

Abstract: Based on sea surface salinity (SSS) observations from Argo profiling floats during 1996—2012, SSS response to typhoons was analyzed by a synthetic analytical method. The results show that there exists an apparent asymmetry in the SSS response to typhoons: the SSS on the right side of the track increases markedly, however on the left side,it increases within radius of 50 knots wind speed (R₅₀) while decreases outside the R₅₀. Further analyses indicate that intensity, translation speed of typhoon and ocean mixed layer depth all have significant impacts on the SSS response. Strong or slow moving typhoons can produce SSS rises in a large area, whereas SSS increases (decreases) on the right (left) side of the track during the period of weak or fast moving typhoons. In summer (Jun.-Sep.), SSS generally rises more in magnitude and area after the passage of typhoon in regions of shallow mixed layer than in deep one,where SSS rises slightly within radius of 2R₅₀ and decreases on the left side far away from typhoon track.

Key words: sea surface salinity, Argo profiling floats, typhoon, mixed layer depth

CLC Number:

P731.12

WU Ling-wei, LING Zheng. Analysis of sea surface salinity response to typhoon in the Northwest Pacific based on Argo data[J]. Journal of Marine Sciences, 2015, 33(3): 1-6.

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