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Sea Ice
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2021
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Description:Winter maximum (March) and summer minimum (September) 2021 sea ice extents were less extreme compared to the last couple of years, but the 15 lowest minimum extents have all occurred in the last 15 years. An early onset of sea ice melt and retreat occurred in the Laptev Sea, leading to record-low extent in the region during May and June, while winter advection of thick, multiyear ice into the Beaufort and Chukchi Seas resulted in a late and limited spring retreat in that region. The amount of multiyear sea ice, based on available data since 1985, reached its second lowest level by the end of summer 2021, sea ice thickness was lower than recent years, and volume was at record low (since at least 2010) in April 2021.
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Rights Information:CC0 Public Domain
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Compliance:Submitted
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