气候变化领域集成服务门户(CCPortal): Drift of Pancake Ice Floes in the Winter Antarctic Marginal Ice Zone During Polar Cyclones

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DOI	10.1029/2019JC015418
	Drift of Pancake Ice Floes in the Winter Antarctic Marginal Ice Zone During Polar Cyclones
	Alberello A.; Bennetts L.; Heil P.; Eayrs C.; Vichi M.; MacHutchon K.; Onorato M.; Toffoli A.
发表日期	2020
ISSN	21699275
卷号	125 期号:3
英文摘要	High temporal resolution in situ measurements of pancake ice drift are presented, from a pair of buoys deployed on floes in the Antarctic marginal ice zone during the winter sea ice expansion, over 9 days in which the region was impacted by four polar cyclones. Concomitant measurements of wave-in-ice activity from the buoys are used to infer that the ice remained unconsolidated, and pancake ice conditions were maintained over at least the first 7 days. Analysis of the data shows (i) the fastest reported ice drift speeds in the Southern Ocean; (ii) high correlation of drift velocities with the surface wind velocities, indicating absence of internal ice stresses >100 km from the ice edge where remotely sensed ice concentration is 100%; and (iii) presence of a strong inertial signature with a 13 hr period. A Lagrangian free drift model is developed, including a term for geostrophic currents that reproduce the 13 hr period signature in the ice motion. The calibrated model provides accurate predictions of the ice drift for up to 2 days, and the calibrated parameters provide estimates of wind and ocean drag for pancake floes under storm conditions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Antarctic; buoy; drift; marginal ice zone; pancake ice; sea ice
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/186936
作者单位	School of Mathematical Sciences, University of Adelaide, Adelaide, SA, Australia; Australian Antarctic Division, Hobart, Australia; ACE-CRC, Hobart, Australia; Center for Global Sea Level Change, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates; Department of Oceanography & Marine Research Institute, University of Cape Town, Rondenbosch, South Africa; Department of Civil Engineering, University of Cape Town, Rondenbosch, South Africa; Dipartimento di Fisica, Università di Torino, Torino, Italy; INFN, Torino, Italy; Department of Infrastructure Engineering, The University of Melbourne, Parkville, VIC, Australia
推荐引用方式 GB/T 7714	Alberello A.,Bennetts L.,Heil P.,et al. Drift of Pancake Ice Floes in the Winter Antarctic Marginal Ice Zone During Polar Cyclones[J],2020,125(3).
APA	Alberello A..,Bennetts L..,Heil P..,Eayrs C..,Vichi M..,...&Toffoli A..(2020).Drift of Pancake Ice Floes in the Winter Antarctic Marginal Ice Zone During Polar Cyclones.Journal of Geophysical Research: Oceans,125(3).
MLA	Alberello A.,et al."Drift of Pancake Ice Floes in the Winter Antarctic Marginal Ice Zone During Polar Cyclones".Journal of Geophysical Research: Oceans 125.3(2020).