This Dynamic Planet, Arctic Map Caption

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Map of Arctic region using polar projection and scale (1:30,000,000), equal to that of the main map at the Equator. Symbols and topography color scale are those of the main map; dashed red line indicates diffuse plate boundary. Bathymetry from International Bathymetric Chart of the Arctic Ocean. "Snowflake" stipple indicates Greenland's glacial ice cap, with its surface contours (in meters) shown in white. Ice-surface and sub-ice topography from the [U.S.] National Snow and Ice Data Center. Dashed white line shows the minimum limit of sea ice (1972–2003 average) from the [U.S.] National/Naval Ice Center.

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