气候变化领域集成服务门户(CCPortal): Drivers of Interannual Sea Ice Concentration Variability in the Atlantic Water Inflow Region North of Svalbard

CCPortal

DOI	10.1029/2020JC016522
	Drivers of Interannual Sea Ice Concentration Variability in the Atlantic Water Inflow Region North of Svalbard
	Lundesgaard Ø.; Sundfjord A.; Renner A.H.H.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Sea ice concentration along the continental margin of the Arctic Ocean is influenced by a multitude of factors, including local freezing and melting due to atmospheric forcing, lateral advection of sea ice by winds and ocean currents, and melting from below by warm Atlantic Water (AW). Here, we characterize the evolution of sea ice concentration in an area on the continental shelf break north of Svalbard in the period between 2012 and 2019. During this period, a semi-regular seasonal pattern in sea ice concentration was interrupted by three anomalous seasons; a high ice anomaly during autumn 2014 and low ice anomalies during spring 2016 and 2018. Neither type of anomaly can be explained by abnormal upper ocean heat content as measured by an ocean mooring located near the shelf break. Instead, we find that the predominant driver of interannual sea ice concentration variability during this period was variations in large-scale ice drift. While heat flux from the ocean cannot explain the interannual variability, it plays a key role in maintaining periods of open water in the AW inflow region despite freezing air temperatures during most of the year. These results are consistent with the sea ice concentration flux divergence from satellite records, which suggests that the southern continental slope of the Eurasian Basin is an important melting area for sea ice advected in from the north. © 2021. The Authors.
英文关键词	Arctic Ocean; Atlantic Water; Eurasian Basin; interannual variability; sea ice; Svalbard
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186359
作者单位	Norwegian Polar Institute, Fram Centre, Tromsø, Norway; Institute of Marine Research, Fram Centre, Tromsø, Norway
推荐引用方式 GB/T 7714	Lundesgaard Ø.,Sundfjord A.,Renner A.H.H.. Drivers of Interannual Sea Ice Concentration Variability in the Atlantic Water Inflow Region North of Svalbard[J],2021,126(4).
APA	Lundesgaard Ø.,Sundfjord A.,&Renner A.H.H..(2021).Drivers of Interannual Sea Ice Concentration Variability in the Atlantic Water Inflow Region North of Svalbard.Journal of Geophysical Research: Oceans,126(4).
MLA	Lundesgaard Ø.,et al."Drivers of Interannual Sea Ice Concentration Variability in the Atlantic Water Inflow Region North of Svalbard".Journal of Geophysical Research: Oceans 126.4(2021).