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Observations of exponential wave attenuation in Antarctic sea ice during the PIPERS campaign


Kohout, AL and Smith, M and Roach, LA and Williams, G and Montiel, F and Williams, MJM, Observations of exponential wave attenuation in Antarctic sea ice during the PIPERS campaign, Annals of Glaciology, 61, (82) pp. 196-209. ISSN 0260-3055 (2020) [Refereed Article]


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Copyright 2020 the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1017/aog.2020.36


Quantifying the rate of wave attenuation in sea ice is key to understanding trends in the Antarctic marginal ice zone extent. However, a paucity of observations of waves in sea ice limits progress on this front. We deployed 14 waves-in-ice observation systems (WIIOS) on Antarctic sea ice during the Polynyas, Ice Production, and seasonal Evolution in the Ross Sea expedition (PIPERS) in 2017. The WIIOS provide in situ measurement of surface wave characteristics. Two experiments were conducted, one while the ship was inbound and one outbound. The sea ice throughout the experiments generally consisted of pancake and young ice <0.5 m thick. The WIIOS survived a minimum of 4 d and a maximum of 6 weeks. Several large-wave events were captured, with the largest recorded significant wave height over 9 m. We find that the total wave energy measured by the WIIOS generally decays exponentially in the ice and the rate of decay depends on ice concentration.

Item Details

Item Type:Refereed Article
Keywords:sea ice, sea-ice dynamics, sea-ice growth and decay
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Antarctic and Southern Ocean ice dynamics
UTAS Author:Williams, G (Associate Professor Guy Williams)
ID Code:143547
Year Published:2020
Web of Science® Times Cited:8
Deposited By:Oceans and Cryosphere
Deposited On:2021-03-24
Last Modified:2021-05-12
Downloads:9 View Download Statistics

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