Variables Optimum interpolation SST Optimum interpolation SST anomaly 20°C isotherm depth 20°C isotherm depth anomaly Surface zonal wind stress Surface zonal wind stress anomaly Zonal wind stress, OISST, & 20°C isotherm depth (Pacific) Zonal wind stress, OISST, & 20°C isotherm depth anomaly (Pacific) Zonal wind stress, OISST, & 20°C isotherm depth (Atlantic) Zonal wind stress, OISST, & 20°C isotherm depth anomaly (Atlantic) Zonal wind stress, OISST, & 20°C isotherm depth (Indian) Zonal wind stress, OISST, & 20°C isotherm depth anomaly (Indian) Latitude Equator Year 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 past 12 months 
www.nws.noaa.gov 
