The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification

Abstract The loss of Arctic sea ice is a conspicuous example of climate change. Climate models project ice-free conditions during summer this century under realistic emission scenarios, reflecting the increase in seasonality in ice cover. To quantify the increased seasonality in the Arctic-Subarctic...

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Autores principales:	Thomas W. N. Haine, Torge Martin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/19191eab6d124efebb3c6af8313cb395
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id	oai:doaj.org-article:19191eab6d124efebb3c6af8313cb395
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spelling	oai:doaj.org-article:19191eab6d124efebb3c6af8313cb3952021-12-02T12:32:45ZThe Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification10.1038/s41598-017-04573-02045-2322https://doaj.org/article/19191eab6d124efebb3c6af8313cb3952017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04573-0https://doaj.org/toc/2045-2322Abstract The loss of Arctic sea ice is a conspicuous example of climate change. Climate models project ice-free conditions during summer this century under realistic emission scenarios, reflecting the increase in seasonality in ice cover. To quantify the increased seasonality in the Arctic-Subarctic sea ice system, we define a non-dimensional seasonality number for sea ice extent, area, and volume from satellite data and realistic coupled climate models. We show that the Arctic-Subarctic, i.e. the northern hemisphere, sea ice now exhibits similar levels of seasonality to the Antarctic, which is in a seasonal regime without significant change since satellite observations began in 1979. Realistic climate models suggest that this transition to the seasonal regime is being accompanied by a maximum in Arctic amplification, which is the faster warming of Arctic latitudes compared to the global mean, in the 2010s. The strong link points to a peak in sea-ice-related feedbacks that occurs long before the Arctic becomes ice-free in summer.Thomas W. N. HaineTorge MartinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Thomas W. N. Haine Torge Martin The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
description	Abstract The loss of Arctic sea ice is a conspicuous example of climate change. Climate models project ice-free conditions during summer this century under realistic emission scenarios, reflecting the increase in seasonality in ice cover. To quantify the increased seasonality in the Arctic-Subarctic sea ice system, we define a non-dimensional seasonality number for sea ice extent, area, and volume from satellite data and realistic coupled climate models. We show that the Arctic-Subarctic, i.e. the northern hemisphere, sea ice now exhibits similar levels of seasonality to the Antarctic, which is in a seasonal regime without significant change since satellite observations began in 1979. Realistic climate models suggest that this transition to the seasonal regime is being accompanied by a maximum in Arctic amplification, which is the faster warming of Arctic latitudes compared to the global mean, in the 2010s. The strong link points to a peak in sea-ice-related feedbacks that occurs long before the Arctic becomes ice-free in summer.
format	article
author	Thomas W. N. Haine Torge Martin
author_facet	Thomas W. N. Haine Torge Martin
author_sort	Thomas W. N. Haine
title	The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
title_short	The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
title_full	The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
title_fullStr	The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
title_full_unstemmed	The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification
title_sort	arctic-subarctic sea ice system is entering a seasonal regime: implications for future arctic amplification
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/19191eab6d124efebb3c6af8313cb395
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The Arctic-Subarctic sea ice system is entering a seasonal regime: Implications for future Arctic amplification

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