Sack Lunch Seminar (SLS)

Global Ocean Tripole and Climate Variability



Temporally varying upper ocean (0 – 300 m) heat content (HC) was calculated for the global ocean since 1990 from observational data of the Global Temperature and Salinity Profile Program (GTSPP), and reconstructed into (1oX1o) horizontal grids with monthly increment using the optimal spectral decomposition (OSD). Two types of global ocean tripole were found after conducting the empirical orthogonal function (EOF) analysis on the HC anomaly relative to the seasonal variation. The global ocean tripole may connect to the interannual climate variability such as El Nino, El Nino Modoki, and Indian Ocean dipole.