The mass of the Greenland ice sheet has rapidly declined in the last several years due to surface melting and iceberg calving. Between 2002 and 2016, Greenland shed approximately 280 gigatons of ice per year, causing global sea level to rise by 0.03 inches (0.8 millimeters) per year. In these images, orange and red shades indicate areas that lost ice mass, while light blue shades indicate areas that gained ice mass. White indicates areas where there has been very little or no change in ice mass since 2002. Learn more.

Data from NASA's GRACE satellites, which measured Earth’s gravity field, show that the land ice sheets in both Antarctica (first chart here) and Greenland (second chart here) have been losing mass (ice) since 2002.

Land-based ice losses, like those in Greenland and Antarctica, make up the largest component of observed sea-level rise—even bigger than thermal expansion of the ocean due to global warming.

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