FIGURE T16. Mean (top) and anomalous
(bottom) depth of the 20°C isotherm. Contour interval is 40 m (top) and
10 m (bottom). Dashed contours in bottom panel indicate negative
anomalies. Data are derived from the NCEP’s global ocean data
assimilation system which assimilates oceanic observations into an
oceanic GCM (Behringer and Xue, Proceedings of Eighth Symposium on
Integrated Observing and Assimilation Systems for Atmospher, Oceans, and
Land Surface, Seattle, Washington, 11-15 January 2004). Anomalies
are departures from the 1981-2010 base period means.