Examination of the geographical distribution of the differences in 0 to 700 m heat content between the 1977 — 1981 and 1965 — 1969
pentads and the 1986 — 1990 and 1977 — 1981
pentads shows that the pattern of heat content change has spatial scales of entire ocean basins and is also found in similar analyses
by Ishii et al. (2006).