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Fine-scale sea ice structure characterized using underwater acoustic methods

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journal contribution
posted on 2023-05-18, 22:45 authored by Vanessa LucieerVanessa Lucieer, Nau, AW, Alexander Forrest, Hawes, I
Antarctic sea ice is known to provide unique ecosystem habitat at the ice–ocean interface. Mapping sea ice characteristics - such as thickness and roughness - at high resolution from beneath the ice is difficult due to access. A Geoswath Plus phase-measuring bathymetric sonar mounted on an autonomous underwater vehicle (AUV) was employed in this study to collect data underneath the sea ice at Cape Evans in Antarctica in November 2014. This study demonstrates how acoustic data can be collected and processed to resolutions of 1 m for acoustic bathymetry and 5 cm for acoustic backscatter in this challenging environment. Different ice textures such as platelet ice, smooth ice, and sea ice morphologies, ranging in size from 1 to 50 m were characterized. The acoustic techniques developed in this work could provide a key to understanding the distribution of sea ice communities, as they are nondisruptive to the fragile ice environments and provide geolocated data over large spatial extents. These results improve our understanding of sea ice properties and the complex, highly variable ecosystem that exists at this boundary.

History

Publication title

Remote Sensing

Volume

8

Issue

10

Article number

821

Number

821

Pagination

1-17

ISSN

2072-4292

Department/School

Institute for Marine and Antarctic Studies

Publisher

MDPIAG

Place of publication

Switzerland

Rights statement

© 2016 by the authors. Licensed under Creative Commons Attribution 4.0 https://creativecommons.org/licenses/by/4.0/International (CC BY 4.0)

Repository Status

  • Open

Socio-economic Objectives

Assessment and management of terrestrial ecosystems

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