FIGURE 8.6 September 2004 averages of wind stress curl with contours of crosswind SST gradient (left) and wind stress divergence with contours of downwind SST gradient (right) over the California Current system. The wind stress fields were constructed from QuikScatdata. The SST fields were constructed from the U.S. Navy Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS). Satellite microwave measurements of SST are not well suited to studies in this region because of the coarse (~50 km) resolution and the inability to measure SST closer than ~75 km to land. SOURCE: Chelton et al. (2007a). Reprinted with permission from the American Meteorological Society, copyright 2007.