%0 Journal Article
%T Consequences of shoaling of the Central American Seaway determined from modeling Nd isotopes
%+ Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE)
%+ Modélisation du climat (CLIM)
%+ Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE)
%+ University of Oriente
%+ Centre National de Référence du Paludisme [Cayenne, Guyane française] (CNR)
%+ Centre national de recherches météorologiques (CNRM)
%+ Universidade de São Paulo
%A Sepulchre, P.
%A Arsouze, T.
%A Donnadieu, Yannick
%A Dutay, J.-C.
%A Jaramillo, C.
%A Le Bras, J.
%A Martin, E.
%A Montes, C.
%A Waite, A.
%< avec comité de lecture
%@ 0883-8305
%J Paleoceanography
%I American Geophysical Union
%V 29
%N 3
%P 176-189
%8 2014-03
%D 2014
%R 10.1002/2013PA002501
%Z Sciences of the Universe [physics]/Ocean, Atmosphere
%Z Sciences of the Universe [physics]/Earth Sciences/Climatology
%Z Sciences of the Universe [physics]/Earth Sciences/Oceanography
%Z Sciences of the Universe [physics]/Earth Sciences/PaleontologyJournal articles
%X The Central American Seaway played a pivotal role in shaping global climate throughout the late Cenozoic. Recent geological surveys have provided new constraints on timing of the seaway shoaling, while neodymium isotopic (ε Nd) data measured on fossil teeth, debris, and ferromanganese crusts have helped define the history of water masses in the region. Here we provide the first 3-D simulations of ε Nd responses to the shoaling seaway. Our model suggests that a narrow and shallow seaway is sufficient to affect interoceanic circulation, that inflow/ outflow balance between the Caribbean and the Antilles responds nonlinearly to sill depth, and that a seaway narrower than 400 km is consistent with an active Atlantic meridional overturning circulation during the late Miocene. Simulated ε Nd values in the Caribbean confirm that inputs from radiogenic Pacific waters in the Caribbean decrease as the seaway shoals. Despite model limitations, a comparison between our results and ε Nd values recorded in the Caribbean helps constrain the depth of the Central American Seaway through time, and we infer that a depth between 50 and 200 m could have been reached 10 Ma ago.
%G English
%2 https://hal.science/hal-02902783/document
%2 https://hal.science/hal-02902783/file/2013PA002501.pdf
%L hal-02902783
%U https://hal.science/hal-02902783
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