Figure 1. Time series for the World Ocean of ocean heat content (10²²J ) for the 0-2000 m (red) and 700-2000 m (black) layers based on running pentadal (five-year) analyses. Each pentadal estimate is plotted at the midpoint of the 5-year period. The vertical bars represent +/- 2.*Standard errors (S.E.) about each pentadal estimate for the 0-2000 m estimates and the grey-shaded area represent +/- 2.*S.E. about each pentadal estimate for the 0-700 m estimates. The blue bar chart at the bottom represents the percent contribution of the 700-2000 m layer to the 0-2000 m layer for each pentad. Reference period is 1955-2006.