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High-resolution mapping of circum-Antarctic landfast sea ice distribution, 2000-2018

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posted on 2023-05-20, 20:50 authored by Alexander FraserAlexander Fraser, Robert MassomRobert Massom, Ohshima, KI, Willmes, S, Kappes, PJ, Cartwright, J, Rick SmithRick Smith

Landfast sea ice (fast ice) is an important component of the Antarctic nearshore marine environment, where it strongly modulates ice sheet–ocean–atmosphere interactions and biological and biogeochemical processes, forms a key habitat, and affects logistical operations. Given the wide-ranging importance of Antarctic fast ice and its sensitivity to climate change, improved knowledge of its change and variability in its distribution is a high priority. Antarctic fast-ice mapping to date has been limited to regional studies and a time series covering East Antarctica from 2000 to 2008. Here, we present the first continuous, high-spatio-temporal resolution (1 km, 15 d) time series of circum-Antarctic fast-ice extent; this covers the period March 2000 to March 2018, with future updates planned. This dataset was derived by compositing cloud-free satellite visible and thermal infrared imagery using an existing methodology, modified to enhance automation and reduce subjectivity in defining the fast-ice edge. This new dataset (Fraser et al.2020) has wide applicability and is available at https://doi.org/10.26179/5d267d1ceb60c. The new algorithm presented here will enable continuous large-scale fast-ice mapping and monitoring into the future.

History

Publication title

Earth System Science Data

Volume

12

Issue

4

Pagination

2987-2999

ISSN

1866-3508

Department/School

Institute for Marine and Antarctic Studies

Publisher

Copernicus GmbH

Place of publication

Germany

Rights statement

Copyright the Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.

Repository Status

  • Open

Socio-economic Objectives

Climate variability (excl. social impacts)

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