The volume of water ice in the cap is 821,000 cubic kilometers (197,000 cubic miles), equal to 30% of the Earth's Greenland ice sheet.
The volume of water ice in the cap is 821,000 cubic kilometers (197,000 cubic miles). This is equal to 30% of the Earth's Greenland ice sheet. Results of radar measurements of the north polar ice cap determined this. Results were published in 2009.