Repository logo
 
Publication

Global reorganization of atmospheric circulation during Dansgaard–Oeschger cycles

2023-08-28Conference object Open access
Simple item page
dc.contributor.authorJens Fohlmeister
dc.contributor.authorNatasha Sekhon
dc.contributor.authorAndrea Columbu
dc.contributor.authorGuido Vettoretti
dc.contributor.authorNils Weitzel
dc.contributor.authorKira Rehfeld
dc.contributor.authorMaya Ben-Yami
dc.contributor.authorNorbert Marwan
dc.contributor.authorNiklas Boers
dc.contributor.authorVeiga-Pires, Cristina
dc.date.accessioned2024-10-14T13:37:12Z
dc.date.available2024-10-14T13:37:12Z
dc.date.issued2023-08-28
dc.description.abstractIce core records from Greenland provide evidence for multiple abrupt cold-warm-cold events recurring at millennial time scales during the last glacial interval. Although climate variations resembling Dansgaard- Oeschger (DO) oscillations have been identified in climate archives across the globe, our understanding of the climate and ecosystem impacts of the Greenland warming events in lower latitudes remains incomplete. Here, we investigate the influence of DO-cold-to-warm transitions on the global atmospheric circulation pattern. We comprehensively analyze delta O-18 changes during DO transitions in a globally distributed dataset of speleothems and set those in context with simulations of a comprehensive high-resolution climate model featuring internal millennial-scale variations of similar magnitude. Across the globe, speleothem delta O-18 signals and model results indicate consistent large-scale changes in precipitation amount, moisture source, or seasonality of precipitation associated with the DO transitions, in agreement with northward shifts of the Hadley circulation. Furthermore, we identify a decreasing trend in the amplitude of DO transitions with increasing distances from the North Atlantic region. This provides quantitative observational evidence for previous suggestions of the North Atlantic region being the focal point for these archetypes of past abrupt climate changes.eng
dc.description.sponsorshipGrant agreement No. 820970; grant agreement No. 956170; project no. 395588486
dc.identifier.doi10.1073/pnas.2302283120
dc.identifier.eissn1091-6490
dc.identifier.issn0027-8424
dc.identifier.urihttp://hdl.handle.net/10400.1/26070
dc.language.isoeng
dc.peerreviewedyes
dc.publisherNational Academy of Sciences
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.relation.ispartofProceedings of the National Academy of Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectGlacial climate
dc.subjectStadial-interstadial transitions
dc.subjectSpeleothem
dc.subjectClimate model
dc.titleGlobal reorganization of atmospheric circulation during Dansgaard–Oeschger cycleseng
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00350%2F2020/PT
oaire.citation.issue36
oaire.citation.startPagee2302283120
oaire.citation.titleProceedings of the National Academy of Sciences (PNAS)
oaire.citation.volume120
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameVeiga-Pires
person.givenNameCristina
person.identifier113325
person.identifier.ciencia-id4A1F-CEDA-E66C
person.identifier.orcid0000-0002-9323-0723
person.identifier.ridB-5144-2008
person.identifier.scopus-author-id7801372905
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublicationd1541efa-0eaa-48dc-aea3-a1e64aa0065a
relation.isAuthorOfPublication.latestForDiscoveryd1541efa-0eaa-48dc-aea3-a1e64aa0065a
relation.isProjectOfPublication62b4d568-8b21-464c-97ed-de826eab4136
relation.isProjectOfPublication.latestForDiscovery62b4d568-8b21-464c-97ed-de826eab4136

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
fohlmeister-et-al-2023-global-reorganization-of-atmospheric-circulation-during-dansgaard-oeschger-cycles.pdf
Size:
1.81 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.46 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CIM2-Artigos (em revistas ou actas indexadas)