Volumes of the World's Oceans From ETOPO2v2

We have calculated the volumes of the world's oceans from the 2 arc-minute ETOPO2v2 global relief model assembled by the National Geophysical Data Center. Total: 1,332 x 10\textsuperscript{6} km\textsuperscript{3}. Pacific Ocean: 659 x 10\textsuperscript{6} km\textsuperscript{3}. Atlantic Ocean: 306 x 10\textsuperscript{6} km\textsuperscript{3}. Arctic Ocean: 18.7 x 10\textsuperscript{6} km\textsuperscript{3}. Indian Ocean: 263 x 10\textsuperscript{6} km\textsuperscript{3}. Southern Ocean: 71.0 x 10\textsuperscript{6} km\textsuperscript{3}. Mediterranean region: 4.41 x 10\textsuperscript{6} km\textsuperscript{3}. South China and Eastern Archipelagic seas: 9.78 x 10\textsuperscript{6} km\textsuperscript{3}. Baltic Sea: 21.2 x 10\textsuperscript{3} km\textsuperscript{3}. Ocean limits were derived from IHO Special Publication No. 23 and represented in ArcGIS polygon format. Ocean volumes were determined by clipping the ETOPO2v2 digital elevation model to the appropriate polygon (to prevent inclusion of dry elevations below sea level), calculating the area of each grid cell (using the WGS84 spheroid), and summing the volumes (area x depth) of grid cells below sea level. This methodology can be extended to any ocean basin or other region where a digital elevation model has been generated. We anticipate that our refined ocean volume calculations will prove useful to physical oceanographic studies, climate modeling, and other research that uses ocean volumes as a prerequisite input.