Late glacial initiation of Holocene eastern Mediterranean sapropel formation.
Identifieur interne : 002A08 ( PubMed/Checkpoint ); précédent : 002A07; suivant : 002A09Late glacial initiation of Holocene eastern Mediterranean sapropel formation.
Auteurs : Rosina Grimm [Allemagne] ; Ernst Maier-Reimer [Allemagne] ; Uwe Mikolajewicz [Allemagne] ; Gerhard Schmiedl [Allemagne] ; Katharina Müller-Navarra [Allemagne] ; Fanny Adloff [France] ; Katharine M. Grant [Australie] ; Martin Ziegler [Pays-Bas] ; Lucas J. Lourens [Pays-Bas] ; Kay-Christian Emeis [Allemagne]Source :
- Nature communications [ 2041-1723 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical : Benzopyrans, Humic Substances, Oxygen.
- geographic : Mediterranean Sea.
- chemistry : Seawater.
- Carbon Cycle, Foraminifera, Geologic Sediments, Ice Cover, Models, Theoretical, Radiometric Dating.
Abstract
Recurrent deposition of organic-rich sediment layers (sapropels) in the eastern Mediterranean Sea is caused by complex interactions between climatic and biogeochemical processes. Disentangling these influences is therefore important for Mediterranean palaeo-studies in particular, and for understanding ocean feedback processes in general. Crucially, sapropels are diagnostic of anoxic deep-water phases, which have been attributed to deep-water stagnation, enhanced biological production or both. Here we use an ocean-biogeochemical model to test the effects of commonly proposed climatic and biogeochemical causes for sapropel S1. Our results indicate that deep-water anoxia requires a long prelude of deep-water stagnation, with no particularly strong eutrophication. The model-derived time frame agrees with foraminiferal δ(13)C records that imply cessation of deep-water renewal from at least Heinrich event 1 to the early Holocene. The simulated low particulate organic carbon burial flux agrees with pre-sapropel reconstructions. Our results offer a mechanistic explanation of glacial-interglacial influence on sapropel formation.
DOI: 10.1038/ncomms8099
PubMed: 26028337
Affiliations:
- Allemagne, Australie, France, Pays-Bas
- Hambourg, Midi-Pyrénées, Occitanie (région administrative)
- Hambourg, Toulouse
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pubmed:26028337Le document en format XML
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<front><div type="abstract" xml:lang="en">Recurrent deposition of organic-rich sediment layers (sapropels) in the eastern Mediterranean Sea is caused by complex interactions between climatic and biogeochemical processes. Disentangling these influences is therefore important for Mediterranean palaeo-studies in particular, and for understanding ocean feedback processes in general. Crucially, sapropels are diagnostic of anoxic deep-water phases, which have been attributed to deep-water stagnation, enhanced biological production or both. Here we use an ocean-biogeochemical model to test the effects of commonly proposed climatic and biogeochemical causes for sapropel S1. Our results indicate that deep-water anoxia requires a long prelude of deep-water stagnation, with no particularly strong eutrophication. The model-derived time frame agrees with foraminiferal δ(13)C records that imply cessation of deep-water renewal from at least Heinrich event 1 to the early Holocene. The simulated low particulate organic carbon burial flux agrees with pre-sapropel reconstructions. Our results offer a mechanistic explanation of glacial-interglacial influence on sapropel formation.</div>
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<ArticleTitle>Late glacial initiation of Holocene eastern Mediterranean sapropel formation.</ArticleTitle>
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<Abstract><AbstractText>Recurrent deposition of organic-rich sediment layers (sapropels) in the eastern Mediterranean Sea is caused by complex interactions between climatic and biogeochemical processes. Disentangling these influences is therefore important for Mediterranean palaeo-studies in particular, and for understanding ocean feedback processes in general. Crucially, sapropels are diagnostic of anoxic deep-water phases, which have been attributed to deep-water stagnation, enhanced biological production or both. Here we use an ocean-biogeochemical model to test the effects of commonly proposed climatic and biogeochemical causes for sapropel S1. Our results indicate that deep-water anoxia requires a long prelude of deep-water stagnation, with no particularly strong eutrophication. The model-derived time frame agrees with foraminiferal δ(13)C records that imply cessation of deep-water renewal from at least Heinrich event 1 to the early Holocene. The simulated low particulate organic carbon burial flux agrees with pre-sapropel reconstructions. Our results offer a mechanistic explanation of glacial-interglacial influence on sapropel formation.</AbstractText>
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<ForeName>Martin</ForeName>
<Initials>M</Initials>
<AffiliationInfo><Affiliation>1] ETH Zürich, Geological Institute, Sonneggstrasse 5, Zürich 8092, Switzerland [2] Department of Earth Sciences, University of Utrecht, Budapestlaan 455, Utrecht 3584 CD, The Netherlands.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Lourens</LastName>
<ForeName>Lucas J</ForeName>
<Initials>LJ</Initials>
<AffiliationInfo><Affiliation>Department of Earth Sciences, University of Utrecht, Budapestlaan 455, Utrecht 3584 CD, The Netherlands.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Emeis</LastName>
<ForeName>Kay-Christian</ForeName>
<Initials>KC</Initials>
<AffiliationInfo><Affiliation>1] Center for Earth System Research and Sustainability, Institute of Geology, University of Hamburg, Bundesstrasse 55, Hamburg 20146, Germany [2] Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic"><Year>2015</Year>
<Month>06</Month>
<Day>01</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo><Country>England</Country>
<MedlineTA>Nat Commun</MedlineTA>
<NlmUniqueID>101528555</NlmUniqueID>
<ISSNLinking>2041-1723</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList><Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D001578">Benzopyrans</NameOfSubstance>
</Chemical>
<Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D006812">Humic Substances</NameOfSubstance>
</Chemical>
<Chemical><RegistryNumber>64083-34-7</RegistryNumber>
<NameOfSubstance UI="C050488">sapropel</NameOfSubstance>
</Chemical>
<Chemical><RegistryNumber>S88TT14065</RegistryNumber>
<NameOfSubstance UI="D010100">Oxygen</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Science. 2000 Aug 25;289(5483):1321-4</RefSource>
<PMID Version="1">10958772</PMID>
</CommentsCorrections>
<CommentsCorrections RefType="Cites"><RefSource>Science. 2001 Nov 30;294(5548):1917-20</RefSource>
<PMID Version="1">11729315</PMID>
</CommentsCorrections>
<CommentsCorrections RefType="Cites"><RefSource>Nature. 2012 Apr 04;484(7392):49-54</RefSource>
<PMID Version="1">22481357</PMID>
</CommentsCorrections>
<CommentsCorrections RefType="Cites"><RefSource>Nature. 2012 Nov 29;491(7426):744-7</RefSource>
<PMID Version="1">23151478</PMID>
</CommentsCorrections>
</CommentsCorrectionsList>
<MeshHeadingList><MeshHeading><DescriptorName UI="D001578" MajorTopicYN="N">Benzopyrans</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D057486" MajorTopicYN="Y">Carbon Cycle</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D056908" MajorTopicYN="N">Foraminifera</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D019015" MajorTopicYN="Y">Geologic Sediments</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D006812" MajorTopicYN="N">Humic Substances</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D046448" MajorTopicYN="Y">Ice Cover</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D008522" MajorTopicYN="N" Type="Geographic">Mediterranean Sea</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D008962" MajorTopicYN="N">Models, Theoretical</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D010100" MajorTopicYN="Y">Oxygen</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D055110" MajorTopicYN="N">Radiometric Dating</DescriptorName>
</MeshHeading>
<MeshHeading><DescriptorName UI="D012623" MajorTopicYN="N">Seawater</DescriptorName>
<QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName>
</MeshHeading>
</MeshHeadingList>
</MedlineCitation>
<PubmedData><History><PubMedPubDate PubStatus="received"><Year>2013</Year>
<Month>10</Month>
<Day>28</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted"><Year>2015</Year>
<Month>04</Month>
<Day>01</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez"><Year>2015</Year>
<Month>6</Month>
<Day>2</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed"><Year>2015</Year>
<Month>6</Month>
<Day>2</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline"><Year>2016</Year>
<Month>4</Month>
<Day>7</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>epublish</PublicationStatus>
<ArticleIdList><ArticleId IdType="pubmed">26028337</ArticleId>
<ArticleId IdType="pii">ncomms8099</ArticleId>
<ArticleId IdType="doi">10.1038/ncomms8099</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations><list><country><li>Allemagne</li>
<li>Australie</li>
<li>France</li>
<li>Pays-Bas</li>
</country>
<region><li>Hambourg</li>
<li>Midi-Pyrénées</li>
<li>Occitanie (région administrative)</li>
</region>
<settlement><li>Hambourg</li>
<li>Toulouse</li>
</settlement>
</list>
<tree><country name="Allemagne"><region name="Hambourg"><name sortKey="Grimm, Rosina" sort="Grimm, Rosina" uniqKey="Grimm R" first="Rosina" last="Grimm">Rosina Grimm</name>
</region>
<name sortKey="Emeis, Kay Christian" sort="Emeis, Kay Christian" uniqKey="Emeis K" first="Kay-Christian" last="Emeis">Kay-Christian Emeis</name>
<name sortKey="Maier Reimer, Ernst" sort="Maier Reimer, Ernst" uniqKey="Maier Reimer E" first="Ernst" last="Maier-Reimer">Ernst Maier-Reimer</name>
<name sortKey="Mikolajewicz, Uwe" sort="Mikolajewicz, Uwe" uniqKey="Mikolajewicz U" first="Uwe" last="Mikolajewicz">Uwe Mikolajewicz</name>
<name sortKey="Muller Navarra, Katharina" sort="Muller Navarra, Katharina" uniqKey="Muller Navarra K" first="Katharina" last="Müller-Navarra">Katharina Müller-Navarra</name>
<name sortKey="Schmiedl, Gerhard" sort="Schmiedl, Gerhard" uniqKey="Schmiedl G" first="Gerhard" last="Schmiedl">Gerhard Schmiedl</name>
</country>
<country name="France"><region name="Occitanie (région administrative)"><name sortKey="Adloff, Fanny" sort="Adloff, Fanny" uniqKey="Adloff F" first="Fanny" last="Adloff">Fanny Adloff</name>
</region>
</country>
<country name="Australie"><noRegion><name sortKey="Grant, Katharine M" sort="Grant, Katharine M" uniqKey="Grant K" first="Katharine M" last="Grant">Katharine M. Grant</name>
</noRegion>
</country>
<country name="Pays-Bas"><noRegion><name sortKey="Ziegler, Martin" sort="Ziegler, Martin" uniqKey="Ziegler M" first="Martin" last="Ziegler">Martin Ziegler</name>
</noRegion>
<name sortKey="Lourens, Lucas J" sort="Lourens, Lucas J" uniqKey="Lourens L" first="Lucas J" last="Lourens">Lucas J. Lourens</name>
</country>
</tree>
</affiliations>
</record>
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