Thin ice and storms: Sea ice deformation from buoy arrays deployed during N-ICE2015


Contact
Marcel.Nicolaus [ at ] awi.de

Abstract

Arctic sea ice has displayed significant thinning as well as an increase in drift speed in recent years. Taken together this suggests an associated rise in sea ice deformation rate. A winter and spring expedition to the sea ice covered region north of Svalbard–the Norwegian young sea ICE2015 expedition (N-ICE2015)—gave an opportunity to deploy extensive buoy arrays and to monitor the deformation of the first-year and secondyear ice now common in the majority of the Arctic Basin. During the 5 month long expedition, the ice cover underwent several strong deformation events, including a powerful storm in early February that damaged the ice cover irreversibly. The values of total deformation measured during N-ICE2015 exceed previously measured values in the Arctic Basin at similar scales: At 100 km scale, N-ICE2015 values averaged above 0.1 d-1, compared to rates of 0.08 d-1 or less for previous buoy arrays. The exponent of the power law between the deformation length scale and total deformation developed over the season from 0.37 to 0.54 with an abrupt increase immediately after the early February storm, indicating a weakened ice cover with more free drift of the sea ice floes. Our results point to a general increase in deformation associated with the younger and thinner Arctic sea ice and to a potentially destructive role of winter storms.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Research Networks
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
46176
DOI 10.1002/2016JC012403

Cite as
Itkin, P. , Spreen, G. , Cheng, B. , Doble, M. , Girard-Ardhuin, F. , Haapala, J. , Hughes, N. , Kaleschke, L. , Nicolaus, M. and Wilkinson, J. (2017): Thin ice and storms: Sea ice deformation from buoy arrays deployed during N-ICE2015 , Journal of Geophysical Research-Oceans, 122 (6), pp. 4661-4674 . doi: 10.1002/2016JC012403


Download
[img]
Preview
PDF
Itkin-2017-JGR.pdf

Download (7MB) | Preview

Share


Citation

Research Platforms

Campaigns

Funded by
info:eu-repo/grantAgreement/EC/FP7/603887


Actions
Edit Item Edit Item