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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.
Related URLs:	Google Scholar: Fraser, AD
Item Statistics:	View statistics for this item

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