气候变化领域集成服务门户(CCPortal): The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas

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DOI	10.1007/s00382-019-05095-3
	The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas
	Pope J.O.; Bracegirdle T.J.; Renfrew I.A.; Elvidge A.D.
发表日期	2020
ISSN	0930-7575
起始页码	1937
结束页码	1952
卷号	54
英文摘要	The gyres of the Iceland and Greenland Seas are regions of deep-water formation, driven by large ocean-to-atmosphere heat fluxes that have local maxima adjacent to the sea-ice edge. Recently these regions have experienced a dramatic loss of sea ice, including in winter, which begs the question have surface heat fluxes in the adjacent ocean gyres been affected? To address this a set of regional atmospheric climate model simulations has been run with prescribed sea ice and sea surface temperature fields. Three 20-year model experiments have been examined: Icemax, Icemed and Icemin, where the surface fields are set as the year with maximum, median and minimum sea-ice extents respectively. Under conditions of reduced sea-ice extent there is a 15% (19 W m−2) decrease in total wintertime heat fluxes in the Iceland Sea. In contrast, there is an 8% (9 W m−2) increase in heat fluxes in the Greenland Sea primarily due to higher local SSTs. These differences are manifest as changes in the magnitude of high heat flux events (such as cold air outbreaks). In the Iceland Sea, 76% of these events are lower in magnitude during reduced sea-ice conditions. In the Greenland Sea, 93% of these events are higher in magnitude during reduced sea-ice conditions as a result of higher SSTs coincident with retreating sea ice. So, in these experiments, the reduced wintertime sea-ice conditions force a different response in the two seas. In both gyres, large-scale atmospheric circulation patterns are key drivers of high heat flux events. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate modelling; Greenland Sea; Iceland Sea; MetUM; Sea ice; Surface heat flux
语种	英语
scopus关键词	climate modeling; gyre; heat flux; sea ice; sea surface temperature; temperature anomaly; winter; Arctic Ocean; Greenland Sea; Iceland; Norwegian Sea
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145610
作者单位	British Antarctic Survey, Cambridge, United Kingdom; Met Office Hadley Centre, Met Office, FitzRoy Road, Exeter, United Kingdom; School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom
推荐引用方式 GB/T 7714	Pope J.O.,Bracegirdle T.J.,Renfrew I.A.,et al. The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas[J],2020,54.
APA	Pope J.O.,Bracegirdle T.J.,Renfrew I.A.,&Elvidge A.D..(2020).The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas.Climate Dynamics,54.
MLA	Pope J.O.,et al."The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas".Climate Dynamics 54(2020).