Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3
Alkenone SST: Sediment samples (2.5 to 2.57 g) were freeze-dried and extracted by sonication using dichloromethane. The extracts were dried under nitrogen and hydrolysed with 7% potassium hydroxide in methanol. Extraction with hexane yielded a fraction enriched in neutral compounds, which was cleane...
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PANGAEA - Data Publisher for Earth & Environmental Science
2020
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ftdatacite:10.1594/pangaea.919841 2023-05-15T16:30:01+02:00 Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 Tzedakis, Polychronis C Margari, Vasiliki Skinner, Luke C Menviel, Laurie Capron, Emilie Rhodes, Rachael H Mleneck-Vautravers, Maryline J Ezat, Mohamed Martrat, Belén Grimalt, Joan O Hodell, David A 2020 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.919841 https://doi.pangaea.de/10.1594/PANGAEA.919841 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1594/pangaea.919846 https://dx.doi.org/10.1038/s43247-020-0006-x https://dx.doi.org/10.5194/cp-11-153-2015 https://dx.doi.org/10.5194/cp-4-47-2008 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Heinrich Stadials Interstadials MIS 3 Portuguese Margin DEPTH, sediment/rock Age model Sea surface temperature Calypso Corer Age model, GICC05 Age model, WD2014 Calculated from UK'37 MD123 Marion Dufresne 1995 Dataset dataset 2020 ftdatacite https://doi.org/10.1594/pangaea.919841 https://doi.org/10.1594/pangaea.919846 https://doi.org/10.1038/s43247-020-0006-x https://doi.org/10.5194/cp-11-153-2015 https://doi.org/10.5194/cp-4-47-2008 2022-02-09T13:29:52Z Alkenone SST: Sediment samples (2.5 to 2.57 g) were freeze-dried and extracted by sonication using dichloromethane. The extracts were dried under nitrogen and hydrolysed with 7% potassium hydroxide in methanol. Extraction with hexane yielded a fraction enriched in neutral compounds, which was cleaned with ultra-pure water. The purified extracts were derivatised with BSTFA. Samples were injected diluted in toluene. They were then analysed with a Varian gas chromatograph Model 3400 equipped with a septum programmable injector and a flame ionisation detector. Absolute concentration errors were below 10%. Reproducibility tests showed that the uncertainty in the Uk'37 determinations was lower than 0.015 (ca. ±0.5ºC). The SST reconstruction (Uk'37-SST) was obtained from the relative composition of C37 unsaturated alkenones [Uk'37 = C37:2/(C37:2+C37:3)], using the calibration equation Uk'37 = 0.033*SST+0.044. The record was generated by B. Martart and J.O. Grimalt.Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)]. Dataset Greenland ice core NGRIP DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Heinrich Stadials Interstadials MIS 3 Portuguese Margin DEPTH, sediment/rock Age model Sea surface temperature Calypso Corer Age model, GICC05 Age model, WD2014 Calculated from UK'37 MD123 Marion Dufresne 1995 |
spellingShingle |
Heinrich Stadials Interstadials MIS 3 Portuguese Margin DEPTH, sediment/rock Age model Sea surface temperature Calypso Corer Age model, GICC05 Age model, WD2014 Calculated from UK'37 MD123 Marion Dufresne 1995 Tzedakis, Polychronis C Margari, Vasiliki Skinner, Luke C Menviel, Laurie Capron, Emilie Rhodes, Rachael H Mleneck-Vautravers, Maryline J Ezat, Mohamed Martrat, Belén Grimalt, Joan O Hodell, David A Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
topic_facet |
Heinrich Stadials Interstadials MIS 3 Portuguese Margin DEPTH, sediment/rock Age model Sea surface temperature Calypso Corer Age model, GICC05 Age model, WD2014 Calculated from UK'37 MD123 Marion Dufresne 1995 |
description |
Alkenone SST: Sediment samples (2.5 to 2.57 g) were freeze-dried and extracted by sonication using dichloromethane. The extracts were dried under nitrogen and hydrolysed with 7% potassium hydroxide in methanol. Extraction with hexane yielded a fraction enriched in neutral compounds, which was cleaned with ultra-pure water. The purified extracts were derivatised with BSTFA. Samples were injected diluted in toluene. They were then analysed with a Varian gas chromatograph Model 3400 equipped with a septum programmable injector and a flame ionisation detector. Absolute concentration errors were below 10%. Reproducibility tests showed that the uncertainty in the Uk'37 determinations was lower than 0.015 (ca. ±0.5ºC). The SST reconstruction (Uk'37-SST) was obtained from the relative composition of C37 unsaturated alkenones [Uk'37 = C37:2/(C37:2+C37:3)], using the calibration equation Uk'37 = 0.033*SST+0.044. The record was generated by B. Martart and J.O. Grimalt.Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)]. |
format |
Dataset |
author |
Tzedakis, Polychronis C Margari, Vasiliki Skinner, Luke C Menviel, Laurie Capron, Emilie Rhodes, Rachael H Mleneck-Vautravers, Maryline J Ezat, Mohamed Martrat, Belén Grimalt, Joan O Hodell, David A |
author_facet |
Tzedakis, Polychronis C Margari, Vasiliki Skinner, Luke C Menviel, Laurie Capron, Emilie Rhodes, Rachael H Mleneck-Vautravers, Maryline J Ezat, Mohamed Martrat, Belén Grimalt, Joan O Hodell, David A |
author_sort |
Tzedakis, Polychronis C |
title |
Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
title_short |
Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
title_full |
Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
title_fullStr |
Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
title_full_unstemmed |
Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 |
title_sort |
alkenone sea surface temperatures uk'37-sst from sediment core md01-2444 on the portuguese margin, marine isotope stage 3 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2020 |
url |
https://dx.doi.org/10.1594/pangaea.919841 https://doi.pangaea.de/10.1594/PANGAEA.919841 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core NGRIP |
genre_facet |
Greenland ice core NGRIP |
op_relation |
https://dx.doi.org/10.1594/pangaea.919846 https://dx.doi.org/10.1038/s43247-020-0006-x https://dx.doi.org/10.5194/cp-11-153-2015 https://dx.doi.org/10.5194/cp-4-47-2008 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.919841 https://doi.org/10.1594/pangaea.919846 https://doi.org/10.1038/s43247-020-0006-x https://doi.org/10.5194/cp-11-153-2015 https://doi.org/10.5194/cp-4-47-2008 |
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1766019732029308928 |