Cao, Mengli; Hefter, Jens; Tiedemann, Ralf; Lembke-Jene, Lester; Meyer, Vera D; Mollenhauer, Gesine (2022): Sea surface temperatures reconstructed in sediment cores SO202/1_18-3 and SO202/1_18-6 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.948375, In: Cao, M et al. (2022): Lignin phenols contents and sea surface temperatures in sediment cores from the Bering and Okhotsk Seas [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.948376
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Abstract:
We present TEX86 (Tetraether index of tetraethers consisting of 86 carbon atoms) data from sediment cores SO202/1_18-3 and SO202/1_18-6 in the Bering Sea shelf. TEX86 is a sea surface temperature (SST) proxy based on the distribution of archaeal isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs), and reconstructs SST development during the latest two glacial-interglacial cycles. The branched isoprenoid tetraether (BIT) index (Hopmans et al., 2004) is an indicator of the relative contribution of soil-derived GDGT to marine GDGT. Crucially, a global core top calibration of marine sediments reveals a linear correlation between sedimentary TEX86 and in situ annual mean SST where terrestrial inputs are low (Kim et al., 2008). If BIT values are above the critical value of 0.3 (Weijers et al., 2006), where terrigenous GDGTs potentially bias TEX86-derived SST reconstruction. The regional calibration of SST and TEX86 is based on Seki et al. (2014).
TEX86= log (GDGT-2/(GDGT-1+GDGT-2+GDGT-3))
SST/℃ = 27.2 × TEX86+ 21.8
Keyword(s):
Further details:
Hopmans, Ellen C; Weijers, Johan W H; Schefuß, Enno; Herfort, L; Sinninghe Damsté, Jaap S; Schouten, Stefan (2004): A novel proxy for terrestrial organic matter in sediments based on branched and isoprenoid tetraether lipids. Earth and Planetary Science Letters, 224(1-2), 107-116, https://doi.org/10.1016/j.epsl.2004.05.012
Kim, Jung-Hyun; Schouten, Stefan; Hopmans, Ellen C; Donner, Barbara; Sinninghe Damsté, Jaap S (2008): Global sediment core-top calibration of the TEX86 paleothermometer in the ocean. Geochimica et Cosmochimica Acta, 72(4), 1154-1173, https://doi.org/10.1016/j.gca.2007.12.010
Kim, Jung-Hyun; van der Meer, Jaap; Schouten, Stefan; Helmke, Peer; Willmott, Verónica; Sangiorgi, Francesca; Koç, Nalân; Hopmans, Ellen C; Sinninghe Damsté, Jaap S (2010): New indices and calibrations derived from the distribution of crenarchaeal isoprenoid tetraether lipids: Implications for past sea surface temperature reconstructions. Geochimica et Cosmochimica Acta, 74(16), 4639-4654, https://doi.org/10.1016/j.gca.2010.05.027
Seki, Osamu; Bendle, James A; Harada, Naomi; Kobayashi, Madoka; Sawada, Ken; Moossen, Heiko; Inglis, Gordon N; Nagao, Seiya; Sakamoto, Tatsuhiko (2014): Assessment and calibration of TEX86 paleothermometry in the Sea of Okhotsk and sub-polar North Pacific region: Implications for paleoceanography. Progress in Oceanography, 126, 254-266, https://doi.org/10.1016/j.pocean.2014.04.013
Weijers, Johan W H; Schouten, Stefan; Spaargaren, Otto C; Sinninghe Damsté, Jaap S (2006): Occurrence and distribution of tetraether membrane lipids in soils: Implications for the use of the TEX86 proxy and the BIT index. Organic Geochemistry, 37(12), 1680-1693, https://doi.org/10.1016/j.orggeochem.2006.07.018
Coverage:
Median Latitude: 60.126700 * Median Longitude: -179.444000 * South-bound Latitude: 60.126700 * West-bound Longitude: -179.444500 * North-bound Latitude: 60.126700 * East-bound Longitude: -179.443500
Date/Time Start: 2009-07-25T00:49:00 * Date/Time End: 2009-07-25T06:24:00
Minimum DEPTH, sediment/rock: 0.1000 m * Maximum DEPTH, sediment/rock: 14.9500 m
Event(s):
SO202/1_18-3 * Latitude: 60.126700 * Longitude: -179.444500 * Date/Time: 2009-07-25T00:49:00 * Elevation: -1111.0 m * Recovery: 18.49 m * Location: Bering Sea * Campaign: SO202/1 (INOPEX) * Basis: Sonne * Method/Device: Piston corer (BGR type) (KL) * Comment: KOL: strong gas expansion, liner pieces added, liner deformed (5.08-5.86 m)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Cao, Mengli | |||
| 2 | Latitude of event | Latitude | Cao, Mengli | |||
| 3 | Longitude of event | Longitude | Cao, Mengli | |||
| 4 | DEPTH, sediment/rock | Depth sed | m | Cao, Mengli | Geocode | |
| 5 | Depth, top/min | Depth top | m | Cao, Mengli | ||
| 6 | Depth, bottom/max | Depth bot | m | Cao, Mengli | ||
| 7 | AGE | Age | ka BP | Cao, Mengli | Geocode | |
| 8 | Tetraether index of 86 carbon atoms | TEX86 | Cao, Mengli | Calculated according to Kim et al. (2010) | ||
| 9 | Sea surface temperature | SST | °C | Cao, Mengli | Calibrated after Seki et al. (2014) | |
| 10 | Branched and isoprenoid tetraether index | BIT | Cao, Mengli | Calculated after Hopmans et al. (2004) |
Change history:
2022-11-02T08:04:06 – BIT added, abstract updated
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
281 data points