Acknowledgements: Satellite altimetry fields are from NASA and CNES Jason-1, ESA Envisat and Navy's GFO altimeters and are provided by the US Naval Research Laboratory. Surface winds belong to NASA's QuikSCAT and are provided by NOAA/NESDIS. Sea surface temperature fields are provided by Remote Sensing Systems and sponsored by the NASA Earth Science REASoN DISCOVER Project. Wave heights are obtained from NOAA/NCEP.