Unknown
Belt, Simon T
;
Smik, Lukas
;
Brown, Thomas A
;
[et al.]
Kim, Jung-Hyun
;
Rowland, Steve J
;
Allen, Claire Susannah
;
Gal, Jong-Ku
;
Shin, Kyung-Hoon
;
Lee, Jae Il
;
Taylor, Kyle W R
PANGAEA
In:
Supplement to: Belt, Simon T; Smik, Lukas; Brown, Thomas A; Kim, Jung-Hyun; Rowland, Steve J; Allen, Claire Susannah; Gal, Jong-Ku; Shin, Kyung-Hoon; Lee, Jae Il; Taylor, Kyle W R (2016): Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25. Nature Communications, 7, 12655, https://doi.org/10.1038/ncomms12655
Publication Date:
2024-03-18
Description:
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 〉100 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.
Keywords:
Antarctic Peninsula; ANT-II/3; ANT-III/3; ANT-IV/2; ANT-IV/3; ANT-IV/4; ANT-IX/3; ANT-VI/2; ANT-VI/3; ANT-VIII/5; ANT-VIII/6; Atka Bay; Bransfield Strait; Campaign of event; Camp Norway; Cape Fiske; Date/Time of event; DEPTH, sediment/rock; Drake Passage; Elevation of event; Event label; Filchner Shelf; Filchner Trough; Fram Strait; Gas chromatography - Mass spectrometry (GC-MS); Giant box corer; GKG; Gould Bay; Greenland Slope; Halley Bay; Ice Proxy for the Southern Ocean with 25 carbon atoms per unit sediment mass; Kapp Norvegia; King George Island, Antarctic Peninsula; Latitude of event; Lazarev Sea; Location of event; Longitude of event; Lyddan Island; Maud Rise; Optional event label; Polarstern; Polarstern Kuppe; PS04; PS04/225; PS06/289; PS06/303; PS06/313; PS06/329; PS06 SIBEX; PS08; PS08/294; PS08/324; PS08/327; PS08/333; PS08/338; PS08/340; PS08/344; PS08/345; PS08/346; PS08/347; PS08/350; PS08/353; PS08/354; PS08/355; PS08/356; PS08/364; PS08/366; PS08/368; PS08/374; PS08/375; PS08/379; PS08/380; PS08/381; PS08/382; PS08/386; PS08/396; PS08/402; PS08/445; PS08/601; PS1138-8; PS12; PS12/119; PS12/122; PS12/127; PS12/129; PS12/195; PS12/458; PS1273-1; PS1277-1; PS1282-1; PS1284-1; PS1345-8; PS1364-1; PS1366-2; PS1367-1; PS1370-1; PS1371-1; PS1372-2; PS1373-2; PS1374-2; PS1375-2; PS1376-2; PS1377-1; PS1378-1; PS1379-1; PS1380-1; PS1386-1; PS1388-1; PS1390-1; PS1394-1; PS1395-1; PS1396-1; PS1397-1; PS1398-2; PS1399-1; PS1402-2; PS1406-1; PS1412-1; PS1421-1; PS1453-1; PS1539-1; PS1540-1; PS1542-1; PS1544-1; PS1559-1; PS16; PS16/432; PS16/472; PS16/499; PS16/507; PS16/516; PS16/518; PS16/525; PS16/536; PS16/540; PS16/541; PS16/547; PS16/549; PS1635-2; PS1798-2; PS18; PS18/148; PS18/171; PS18/214; PS18/218; PS18/221; PS1802-2; PS1803-2; PS1805-5; PS1812-5; PS1813-5; PS1817-5; PS1822-1; PS1823-1; PS1824-2; PS1825-5; PS1826-2; PS2006-1; PS2024-3; PS2062-2; PS2065-1; PS2067-1; Weddell Sea
Type:
Dataset
Format:
text/tab-separated-values, 57 data points
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