Repeated Near-Collapse of the Pliocene Sea Surface Temperature Gradient in the North Atlantic
Author
dc.contributor.author
Naafs, B. D. A.
Author
dc.contributor.author
Voelker, A. H. L.
Author
dc.contributor.author
Karas, C.
Author
dc.contributor.author
Andersen, N.
Author
dc.contributor.author
Sierro, F. J.
Admission date
dc.date.accessioned
2020-07-01T23:56:13Z
Available date
dc.date.available
2020-07-01T23:56:13Z
Publication date
dc.date.issued
2020
Cita de ítem
dc.identifier.citation
Paleoceanography and Paleoclimatology, Vol. 35, No. 5, No. artículo: e2020PA003905 May 2020
es_ES
Identifier
dc.identifier.other
10.1029/2020PA003905
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/175740
Abstract
dc.description.abstract
Sea surface temperature (SST) is used to infer past changes in the state of the climate system. Here we use a combination of newly generated and published organic paleothermometer records, together with novel high-resolution benthic foraminiferal delta O-18 stratigraphy, from four sites in the midlatitude North Atlantic (41-58 degrees N) to reconstruct the long-term evolution of the latitudinal SST gradient during the Pliocene and early Pleistocene (4.0 to 2.4 Myr), the last time atmospheric CO2 reached concentrations above 400 ppmv. We demonstrate that the latitudinal SST gradient in the North Atlantic nearly collapsed twice during this period. We conclude that the latitudinal SST gradient in the midlatitude North Atlantic has two end-members: a maximum as existing at present and a minimum that existed during certain periods of the (late) Pliocene. Our results suggest that the 400-ppmv Pliocene world was more dynamic than currently thought.
es_ES
Patrocinador
dc.description.sponsorship
Netherlands Organization for Scientific Research (NWO)
Royal Society Tata University Research Fellowship
Portuguese Foundation for Science and Technology
IF/01500/2014
UID/Multi/04326/2019
German Research Foundation (DFG)
KA3461/1-2
Spanish National Science Agency
RTI2018-099489-B-I00
ANID Millennium Science Initiative/Millennium Nucleus Paleoclimate