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

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Fraser, AD ORCID: 0000-0003-1924-0015, Massom, RA ORCID: 0000-0003-1533-5084, Ohshima, KI, Willmes, S, Kappes, PJ, Cartwright, J and Porter-Smith, R 2020 , 'High-resolution mapping of circum-Antarctic landfast sea ice distribution, 2000-2018' , Earth System Science Data, vol. 12, no. 4 , pp. 2987-2999 , doi: 10.5194/essd-12-2987-2020.

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Abstract

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.

Item Type: Article
Authors/Creators:Fraser, AD and Massom, RA and Ohshima, KI and Willmes, S and Kappes, PJ and Cartwright, J and Porter-Smith, R
Keywords: Antarctic fast ice, landfast sea ice
Journal or Publication Title: Earth System Science Data
Publisher: Copernicus GmbH
ISSN: 1866-3508
DOI / ID Number: 10.5194/essd-12-2987-2020
Copyright Information:

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

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