Hydrogen isotopic composition of alkenones and oxygen isotopes of benthic foraminifera from ODP Site 202-1235


Hydrogen isotopic compositions of C37 long chain alkenones (δ2HC37) have been proposed as a proxy for past seawater salinity and applied in several regions. However, previous studies were based solely on a single core and often suggested unlikely large changes in salinity. Here we present a new δ2HC37 record, in combination with oxygen isotopes of benthic foraminifera from the same samples, from a sediment core from the Chilean margin (ODP site 1235). The observed negative shift in δ2HC37 of 20‰ during deglaciation was identical to that of the nearby located, but deeper, ODP core 1234 (Weiss et al., 2019), suggesting a regionally consistent shift in δ2HC37. Here we present an isotope dataset spanning 0.15-94.43 mbsf. The age model of Haettig et al., 2023 covers the last 40.000 years spanning 0.15-49.50 mbfs.

DOI https://doi.org/10.1594/PANGAEA.958880
Related Identifier IsSupplementTo https://doi.org/10.5194/egusphere-2023-1042
Related Identifier References https://doi.org/10.1594/PANGAEA.957070
Related Identifier References https://doi.org/10.1594/PANGAEA.957090
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.958880
Creator Hättig, Katrin ORCID logo; Varma, Devika ORCID logo; van der Meer, Marcel T J ORCID logo; Schouten, Stefan
Publisher PANGAEA
Publication Year 2023
Funding Reference European Commission https://doi.org/10.13039/501100000780 Crossref Funder ID 847504 https://cordis.europa.eu/project/id/847504 Local training network: Netherlands Earth System Science Centre: “NESSC”
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 649 data points
Discipline Earth System Research
Spatial Coverage (-73.567W, -36.160S, -73.566E, -36.160N); South Pacific Ocean
Temporal Coverage Begin 2002-04-17T04:15:00Z
Temporal Coverage End 2002-04-18T10:00:00Z