气候变化领域集成服务门户(CCPortal): Strong and highly variable push of ocean waves on Southern Ocean sea ice

CCPortal

DOI	10.1073/pnas.1802011115
	Strong and highly variable push of ocean waves on Southern Ocean sea ice
	Stopa J.E.; Sutherland P.; Ardhuin F.
发表日期	2018
ISSN	0027-8424
起始页码	5861
结束页码	5865
卷号	115 期号:23
英文摘要	Sea ice in the Southern Ocean has expanded over most of the past 20 y, but the decline in sea ice since 2016 has taken experts by surprise. This recent evolution highlights the poor performance of numerical models for predicting extent and thickness, which is due to our poor understanding of ice dynamics. Ocean waves are known to play an important role in ice break-up and formation. In addition, as ocean waves decay, they cause a stress that pushes the ice in the direction of wave propagation. This wave stress could not previously be quantified due to insufficient observations at large scales. Sentinel-1 synthetic aperture radars (SARs) provide high-resolution imagery from which wave height is measured year round encompassing Antarctica since 2014. Our estimates give an average wave stress that is comparable to the average wind stress acting over 50 km of sea ice. We further reveal highly variable half-decay distances ranging from 400 m to 700 km, and wave stresses from 0.01 to 1 Pa. We expect that this variability is related to ice properties and possibly different floe sizes and ice thicknesses. A strong feedback of waves on sea ice, via break-up and rafting, may be the cause of highly variable sea-ice properties. © 2018 National Academy of Sciences. All Rights Reserved.
英文关键词	Sentinel-1 SAR; Southern Ocean marginal ice zone; Synthetic aperture radar; Wave radiation stress; Wave–ice interaction
语种	英语
scopus关键词	ice; Antarctica; Article; calculation; geographic and geological phenomena; mathematical analysis; mathematical model; ocean wave; prediction; priority journal; sea ice; wave decay; wave stress; wind; article; human; human experiment; imagery; Southern Ocean; stress; telecommunication; thickness
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158881
作者单位	Stopa, J.E., Laboratoire d’Océanographie Physique et Spatiale (LOPS), l’Université de Bretagne Occidentale (UBO), CNRS, IRD, l’Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER), Plouzane, 29280, France, Department of Ocean Resources and Engineering, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 96822, United States; Sutherland, P., Laboratoire d’Océanographie Physique et Spatiale (LOPS), l’Université de Bretagne Occidentale (UBO), CNRS, IRD, l’Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER), Plouzane, 29280, France; Ardhuin, F., Laboratoire d’Océanographie Physique et Spatiale (LOPS), l’Université de Bretagne Occidentale (UBO), CNRS, IRD, l’Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER), Plouzane, 29280, France
推荐引用方式 GB/T 7714	Stopa J.E.,Sutherland P.,Ardhuin F.. Strong and highly variable push of ocean waves on Southern Ocean sea ice[J],2018,115(23).
APA	Stopa J.E.,Sutherland P.,&Ardhuin F..(2018).Strong and highly variable push of ocean waves on Southern Ocean sea ice.Proceedings of the National Academy of Sciences of the United States of America,115(23).
MLA	Stopa J.E.,et al."Strong and highly variable push of ocean waves on Southern Ocean sea ice".Proceedings of the National Academy of Sciences of the United States of America 115.23(2018).