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Seasonal heat content in the top half-mile of the ocean compared to the 1955-2006 average. Heat content in the global ocean has been above-average (red bars) since the mid-1990s. Graph by NOAA, based on data from NOAA NCEI.
Large map image for OCEAN HEAT

Change in heat content in the upper 2,300 feet of the ocean from 1993-2022. Most places have gained heat (orange). Shading indicates changes were smaller than the range of natural variability. NOAA image, based on data from John Lyman.