ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2011, Vol. 8, No. 2, pp. 111-118

Multivariate analysis of wind stress and curl around the Japan Sea

O.O. Trusenkova 
V.I. Ilichev Pacific Oceanological Institute FEB RAS, 690041 Vladivostok, 43 Karbysheva Str
Wind variability around the Japan Sea is studied using daily data from the global 4 times daily 0.5º-gridded QSCAT/NCEP Blended Ocean Winds product spanning the period from July 1999 through July 2009. The complex empirical orthogonal functions (EOF) of wind stress vectors from the original and low-pass filtered fields are computed. The low-pass filtering removing synoptic variability is performed using wavelet transform. In both cases, patterns for the first and second modes are the same, while the third mode is related to synoptic timescale. The first mode determines general wind directions, characteristic of the East Asia monsoon, while contribution of the higher modes is not significant. Seasonal wind variability is studied, using monthly histograms of general wind directions based on the first mode. Sharp intraseasonal wind shifts occur in the warm season beyond the synoptic time-scale. Typical wind patterns are composed by averaging within local histogram maxima. They are verified by the direct EOF analysis of wind stress curl which yields the winter pattern as the leading mode. The second and third modes are characteristic for the warm season, with the opposite curl sign over the central and northern Japan Sea.
Keywords: satellite scatterometry, wind stress and curl, empirical orthogonal functions, wavelet transform, histogram, East Asia monsoon, the Japan Sea, seasonal variability, typical patterns
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  1. Glebova S.Yu., Izvestiya TINRO, Vol. 134, Vladivostok: TINRO-tsentr, 2003, pp. 209-257.
  2. Dashko N.A., Varlamov S.M., Gidrometeorologiya i gidrokhimiya morei. Vol. 8. Yaponskoe more. Issue 1. Gidrometeorologicheskie usloviya, SPb: Gidrometeoizdat, 2003, pp. 19-103.
  3. Trusenkova O.O., Kaplunenko D.D., Lobanov V.B., Izvestiya Akademii nauk, Fizika atmosfery i okeana, 2008, No. 4, pp. 553-566.
  4. Trusenkova O.O., Stanichnyi S.S., Ratner Yu.B., Izvestiya Akademii nauk, Fizika atmosfery i okeana, 2007, No. 5, pp. 688-703.
  5. Trusenkova O., Nikitin A., Lobanov V., J. Mar. Sys., 2009, Vol. 78, pp. 214-225.