Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach

A high-resolution sea surface temperature (SST) reconstruction of the western Mediterranean was accomplished using two independent, algae-based molecular organic proxies, i.e., the UK 37 index based on long-chain unsaturated ketones and the novel long-chain diol index (LDI) based on the relative abu...

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Authors: Rodrigo-Gámiz, M., Martínez-Ruíz, Francisca C., Rampen, S. W., Schouten, Stefan, Sinninghe Damsté, Jaap S.
Format: article
Status:Published version
Publication Date:2014
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/380091
Online Access:http://hdl.handle.net/10261/380091
Access Level:Open access
Keyword:Alkenones
Long-chain diols
Organic temperature proxies
SST
Western Mediterranean
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spelling Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approachRodrigo-Gámiz, M.Martínez-Ruíz, Francisca C.Rampen, S. W.Schouten, StefanSinninghe Damsté, Jaap S.AlkenonesLong-chain diolsOrganic temperature proxiesSSTWestern MediterraneanA high-resolution sea surface temperature (SST) reconstruction of the western Mediterranean was accomplished using two independent, algae-based molecular organic proxies, i.e., the UK 37 index based on long-chain unsaturated ketones and the novel long-chain diol index (LDI) based on the relative abundances of C28 and C30 1,13- and 1,15-diols. Two marine records, from the western and eastern Alboran Sea basin, spanning the last 14 and 20 kyr, respectively, were studied. Results from the surface sediments suggest that the two proxies presently reflect seasons with similar SST or simply annual mean SST. Both proxy records reveal the transition from the Last Glacial Maximum to the Holocene in the eastern Alboran Sea with an SST increase of approximately 7C for UK 37 and 9C for LDI. Minimum SSTs (10-12C) are reached at the end of the Last Glacial Maximum and during the last Heinrich event with a subsequent rapid SST increase in LDI-SST toward the beginning of the Bölling period (20C), while UK 37-SST remains constantly low (~12C). The Bölling-Alleröd period is characterized by a rapid increase and subsequent decrease in U K 37-SST, while the LDI-SST decrease continuously. Short-term fluctuations in UK 37-SST are probably related to the availability of nutrients and seasonal changes. The Younger Dryas is recorded as a short cold interval followed by progressively warmer temperatures. During the Holocene, the general lower UK 37-derived temperature values in the eastern Alboran (by approximately 1.5-2C) suggest a southeastward cold water migration by the western Alboran gyre and divergence in the haptophyte blooming season between both basins. Key Points High-resolution SST reconstruction is performed in the westernmost Mediterranean Two algae-based proxies show the temperature evolution for the last 20 kyr Derived SSTs suggest different growth seasons of alkenone and diol producers ©2013. The Authors.This work was supported by Projects CGL2012-32659, CGL2009-07603, CTM2009-07715 (Secretaría de Estado de Investigación), 200800050084447 (MARM), Project RNM-5212, Research Group RNM-179 (Junta de Andalucía), and the Earth and Life Sciences Division of the Netherlands Organization for Scientific Research (NWO-ALW). We also thank the TTR program (UNESCO- Moscow State University) regarding the recovery of gravity cores 293G and 434G.American Geophysical UnionMinisterio de Ciencia e Innovación (España)Junta de AndalucíaMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520142025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/380091reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//CGL2012-32659info:eu-repo/grantAgreement/MICINN//CGL2009-07603info:eu-repo/grantAgreement/MICINN//CTM2009-07715-Ehttp://dx.doi.org/10.1002/2013PA002466Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3800912026-05-22T06:33:51Z
dc.title.none.fl_str_mv Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
title Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
spellingShingle Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
Rodrigo-Gámiz, M.
Alkenones
Long-chain diols
Organic temperature proxies
SST
Western Mediterranean
title_short Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
title_full Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
title_fullStr Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
title_full_unstemmed Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
title_sort Sea surface temperature variations in the western Mediterranean Sea over the last 20 kyr: A dual-organic proxy (UK' 37 and LDI) approach
dc.creator.none.fl_str_mv Rodrigo-Gámiz, M.
Martínez-Ruíz, Francisca C.
Rampen, S. W.
Schouten, Stefan
Sinninghe Damsté, Jaap S.
author Rodrigo-Gámiz, M.
author_facet Rodrigo-Gámiz, M.
Martínez-Ruíz, Francisca C.
Rampen, S. W.
Schouten, Stefan
Sinninghe Damsté, Jaap S.
author_role author
author2 Martínez-Ruíz, Francisca C.
Rampen, S. W.
Schouten, Stefan
Sinninghe Damsté, Jaap S.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Junta de Andalucía
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Alkenones
Long-chain diols
Organic temperature proxies
SST
Western Mediterranean
topic Alkenones
Long-chain diols
Organic temperature proxies
SST
Western Mediterranean
description A high-resolution sea surface temperature (SST) reconstruction of the western Mediterranean was accomplished using two independent, algae-based molecular organic proxies, i.e., the UK 37 index based on long-chain unsaturated ketones and the novel long-chain diol index (LDI) based on the relative abundances of C28 and C30 1,13- and 1,15-diols. Two marine records, from the western and eastern Alboran Sea basin, spanning the last 14 and 20 kyr, respectively, were studied. Results from the surface sediments suggest that the two proxies presently reflect seasons with similar SST or simply annual mean SST. Both proxy records reveal the transition from the Last Glacial Maximum to the Holocene in the eastern Alboran Sea with an SST increase of approximately 7C for UK 37 and 9C for LDI. Minimum SSTs (10-12C) are reached at the end of the Last Glacial Maximum and during the last Heinrich event with a subsequent rapid SST increase in LDI-SST toward the beginning of the Bölling period (20C), while UK 37-SST remains constantly low (~12C). The Bölling-Alleröd period is characterized by a rapid increase and subsequent decrease in U K 37-SST, while the LDI-SST decrease continuously. Short-term fluctuations in UK 37-SST are probably related to the availability of nutrients and seasonal changes. The Younger Dryas is recorded as a short cold interval followed by progressively warmer temperatures. During the Holocene, the general lower UK 37-derived temperature values in the eastern Alboran (by approximately 1.5-2C) suggest a southeastward cold water migration by the western Alboran gyre and divergence in the haptophyte blooming season between both basins. Key Points High-resolution SST reconstruction is performed in the westernmost Mediterranean Two algae-based proxies show the temperature evolution for the last 20 kyr Derived SSTs suggest different growth seasons of alkenone and diol producers ©2013. The Authors.
publishDate 2014
dc.date.none.fl_str_mv 2014
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/380091
url http://hdl.handle.net/10261/380091
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO//CGL2012-32659
info:eu-repo/grantAgreement/MICINN//CGL2009-07603
info:eu-repo/grantAgreement/MICINN//CTM2009-07715-E
http://dx.doi.org/10.1002/2013PA002466
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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