Variety and distribution of diatom-based sea-ice proxies in Antarctic marine sediments of the past 2ka

Allen, Claire S. ORCID: https://orcid.org/0000-0002-0938-0551; Weich, Zelna C.. 2022 Variety and distribution of diatom-based sea-ice proxies in Antarctic marine sediments of the past 2ka [in special issue: Climate Variability in Antarctica and the Southern Hemisphere over the Last Millennia Volume 2] Geosciences, 12 (8), 282. 34, pp. https://doi.org/10.3390/geosciences12080282

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Abstract/Summary

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:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.3390/geosciences12080282
ISSN:	2076-3263
Additional Keywords:	Sea-ice; Antarctica; Late Holocene; Marine sediments; Diatoms; Southern Ocean
Date made live:	26 Jul 2022 09:57 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/532794

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.3390/geosciences12080282

ISSN:

2076-3263

Additional Keywords:

Sea-ice; Antarctica; Late Holocene; Marine sediments; Diatoms; Southern Ocean

Date made live:

26 Jul 2022 09:57 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/532794