The past decade has seen the worst years for polar ice sheet melting, with 2019 being the record year. Ice sheet melting now accounts for 25.6% of sea level rise, a fivefold increase since the 1990s. The seven worst years for polar ice sheet melting have occurred during the past decade, with 2019
– have combined 50 satellite surveys of Antarctica and Greenland to determine their rate of ice melting.
Graph from IMBIE satellite data research showing the increasing contribution of ice sheets to global sea level from 1992 to 2020. Credit:IMBIE / CPOM at Northumbria University The East Antarctic Ice Sheet remained close to a state of balance, as it has throughout the satellite era. The latest Ice Sheet Mass Balance Intercomparison Exercise reports that ice loss from Greenland and Antarctica has increased fivefold since the 1990s, and now accounts for a quarter of sea-level rise. The assessment states that between 1992 and 2020, the polar ice sheets lost 7560 billion tonnes of ice – equivalent to an ice cube measuring 20 km each side. Melting of the polar ice sheets has caused a 21 mm rise in global sea level since 1992.
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