Johnson, G.C., and J.M. Lyman, 2020: Warming trends increasingly dominate Global Ocean. Nature Clim. Change, 10, 757–761. https://doi.org/10.1038/s41558-020-0822-0
Ocean warming absorbs about 9/10th of the excess energy that is entering Earth’s climate system because of a build-up of man-made greenhouse gasses in the atmosphere. That warming causes ocean expansion, contributing to sea level rise.
Upper-ocean heat content anomaly linear trends for 1993–2019. Annual estimates of the PMEL combined maps. Values are in W m-2 (colour bar) applying 90% two-tailed (5–95%) confidence limits to outline areas with trends that are statistically significantly different from zero (black contours). Latitudes are gridded at 30° intervals, and longitudes, centered on 150 °W, at 60° intervals (dotted lines). OHCA, ocean heat content anomaly.