Variety and distribution of diatom-based sea ice proxies in Antarctic marine sediments of the past 2000 years

Allen, Claire S. and Weich, Zelna C. 2022. Variety and distribution of diatom-based sea ice proxies in Antarctic marine sediments of the past 2000 years. Geosciences 12 (8) , e282. 10.3390/geosciences12080282

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Abstract

Antarctic sea ice is an essential component of the global climate system. Reconstructions of Antarctic sea ice from marine sediment cores are a vital resource to improve the representation of Antarctic sea ice in climate models and to better understand natural variability in sea ice over centennial and sub-centennial timescales. The Thomas et al. (2019) review of Antarctic sea ice reconstructions from ice and marine cores highlighted the prominence of diatom-based proxies in this research. Here, focusing solely on the diatom-based proxy records in marine sediments, we review the composition of proxies, their advantages and limitations, as well as the spatial and temporal cover of the records over the past 2 ka in order to assess the scope for future assimilation and standardization. The archive comprises 112 records from 68 marine cores, with proxies based on more than 30 different combinations of diatom taxa as well as the relatively new, highly branched isoprenoid (HBI) biomarkers.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Earth and Environmental Sciences
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/
Publisher:	MDPI
Date of First Compliant Deposit:	25 July 2022
Date of Acceptance:	8 July 2022
Last Modified:	04 Jun 2023 04:06
URI:	https://orca.cardiff.ac.uk/id/eprint/151451

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