VIDEO: Get the highlights from NOAA’s 2021 ArcticReportCard and see how climate change is transforming the Arctic region into a ‘dramatically different state’: noaaresearch AGU21 Captioned video available at:
As Arctic tundra warms and thaws, incursions of shrubs and small trees have created new habitat for beaver, which create ponds and wetlands that further transform the once-frozen landscape.NOAA’s 2021 Arctic Report Card documents the numerous ways that climate change continues to fundamentally alter this once reliably-frozen region, as increasing heat and the loss of ice drive its transformation into a warmer, less frozen and more uncertain future.
The minimum sea ice extent measured in September didn’t set a record, but was still significantly below the long-term average. More concerning: the amount of older, multiyear ice was the second lowest since 1985.The Arctic Report Card is organized into three sections. Vital Signs provides annual updates on seven topics: Surface Air Temperature; Terrestrial Snow Cover; Greenland Ice Sheet; Sea Ice; Sea Surface Temperature; Arctic Ocean Primary Productivity; and Tundra Greenness.
Following decades of relative stability, the Greenland ice sheet has now lost mass almost every year since 1998, with record ice loss in 2012 and 2019. In August, rainfall was observed at the Greenland ice sheet’s 10,500-foot summit for the first time ever. The total extent of sea ice in September 2021 was the 12th lowest on record. All 15 of the lowest minimum extents have occurred in the last 15 years. The substantial decline in Arctic ice extent since 1979 is one of the most iconic indicators of climate change.
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