Kundu correlation of annual cycle wind and SST:
For the choice made in kundu code (variable 1 is wind, variable 2 is grad(SST)), the angle of the correlation vector is:
Grad(SST) clockwise from Wind => NEGATIVE angle (r-vector south of east)
Grad(SST) counterclockwise from Wind => POSITIVE angle (r-vector north of east)
==> That is, the angle of the vector is the mean direction of Grad(SST) relative to wind.
Internannual: BasinwideEastern detail Thus, the equatorward-pointing interannual vectors near the dateline imply:
Grad(SST) clockwise from Wind north of the equator, counterclockwise from Wind south of the equator.
Interpret: warmest SST (anomalies) on the equator, wind anomalies are eastward,
and this wind is NOT driven by the local equatorward SST gradient.