Open AccessObserved near‐surface currents under high wind speeds
Author(s) -
Chang Y.C.,
Chen G.Y.,
Tseng R.S.,
Centurioni L. R.,
Chu Peter C.
Publication year - 2012
Publication title -
journal of geophysical research: oceans
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2012jc007996
Subject(s) - drifter , wind stress , geostrophic wind , wind speed , current (fluid) , range (aeronautics) , ocean current , maximum sustained wind , geostrophic current , surface (topology) , environmental science , meteorology , geology , wind direction , atmospheric sciences , geodesy , climatology , wind gradient , oceanography , physics , lagrangian , geometry , mathematics , materials science , composite material , mathematical physics
From the Surface Velocity Program (SVP) drifter current and QuikSCAT wind data, the relationship between the observed near‐surface current vectors and surface wind vectors for the northwestern Pacific Ocean under high winds (20–50 m s −1 ) are obtained with quantitative estimations of near‐surface drift ratio (current speed versus wind speed) r (∼2%) and near‐surface drift angle α (∼0°–10° to the right of the winds). These estimations keep unchanged after removing the surface geostrophic component. From the SVP drifter current and daily WindSat wind data, the estimated r is still approximately 2%. Three linear regression equations are obtained between the observed near‐surface current speeds and the surface wind stress for the high wind range.