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Seasonal sea-ice in the Arctic's last ice area during the Early Holocene
- Detlef, Henrieka (author)
-
- O'Regan, Matt (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Stranne, Christian, 1979- (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Mørk Jensen, Mads (author)
- Glasius, Marianne (author)
- Cronin, Thomas M. (author)
- Pearce, Christof (author)
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- (creator_code:org_t)
- 2023-03-20
- 2023
- English.
- In: Communications Earth & Environment. - : Springer Science and Business Media LLC. - 2662-4435. ; 4:1
- Journal article (peer-reviewed)
Abstract
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- According to climate models, the Lincoln Sea, bordering northern Greenland and Canada, will be the final stronghold of perennial Arctic sea-ice in a warming climate. However, recent observations of prolonged periods of open water raise concerns regarding its long-term stability. Modelling studies suggest a transition from perennial to seasonal sea-ice during the Early Holocene, a period of elevated global temperatures around 10,000 years ago. Here we show marine proxy evidence for the disappearance of perennial sea-ice in the southern Lincoln Sea during the Early Holocene, which suggests a widespread transition to seasonal sea-ice in the Arctic Ocean. Seasonal sea-ice conditions were tightly coupled to regional atmospheric temperatures. In light of anthropogenic warming and Arctic amplification our results suggest an imminent transition to seasonal sea-ice in the southern Lincoln Sea, even if the global temperature rise is kept below a threshold of 2 °C compared to pre-industrial (1850–1900).
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
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- art (subject category)
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