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Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25

Cited 34 time in wos
Cited 39 time in scopus
Title
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25
Other Titles
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25
Authors
Belt, S. T.
Smik, L.
Brown, A.
Kim, J. -H.
Rowland, S. J.
Allen, C. S.
Gal, J. -K.
Shin, K. -H.
Lee, Jae Il
Taylor, K. W. R.
Subject
Science & Technology - Other Topics
Keywords
HIGHLY BRANCHED ISOPRENOIDSLAND-FAST ICESOUTHERN-OCEANPLATELET ICEWEDDELL SEAORGANIC-MATTERMCMURDO SOUNDADELIE LANDPENINSULASEDIMENTS
Issue Date
2016-08
Citation
Belt, S. T., et al. 2016. "Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25". NATURE COMMUNICATIONS, 7: 1-10.
Abstract
The presence of a di-unsaturated highly branched isoprenoid (HBI) lipid biomarker (diene II) in Southern Ocean sediments has previously been proposed as a proxy measure of palaeo Antarctic sea ice. Here we show that a source of diene II is the sympagic diatom Berkeleya adeliensis Medlin. Furthermore, the propensity for B. adeliensis to flourish in platelet ice is reflected by an offshore downward gradient in diene II concentration in 4100 surface sediments from Antarctic coastal and near-coastal environments. Since platelet ice formation is strongly associated with super-cooled freshwater inflow, we further hypothesize that sedimentary diene II provides a potentially sensitive proxy indicator of landfast sea ice influenced by meltwater discharge from nearby glaciers and ice shelves, and re-examination of some previous diene II downcore records supports this hypothesis. The term IPSO25―Ice Proxy for the Southern Ocean with 25 carbon atoms―is proposed as a proxy name for diene II.
URI
https://repository.kopri.re.kr/handle/201206/13014
DOI
http://dx.doi.org/10.1038/ncomms12655
Type
Article
Indexed
SCI
Appears in Collections  
2015 Polar Academic Program (PD15010)
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