%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Nava-Fernandez, X. A.
%A Machain-Castillo, M. L.
%A Sifeddine, Abdelfettah
%A Mendez-Millan, Mercedes
%A Caquineau, Sandrine
%A Gibson, K. A.
%A Tappa, E.
%A Ruiz-Fernandez, A. C.
%A Sanchez-Cabeza, J. A.
%A Rodriguez-Ramirez, A.
%A Lara-Cera, A. R.
%T Planktonic foraminiferal assemblages and particle fluxes at the entrance of the Gulf of California highlight the effects of the strong El Niño 2015-2016
%D 2022
%L fdi:010086389
%G ENG
%J Progress in Oceanography
%@ 0079-6611
%K Particle fluxes ; Sediment trap ; Upwelling ; Eastern Tropical Pacific ; ENSO ; Seasonal cycles ; Primary productivity
%K PACIFIQUE EST ; ZONE TROPICALE ; CALFORNIE GOLFE
%M ISI:000870866500005
%P 102880 [12 ]
%R 10.1016/j.pocean.2022.102880
%U https://www.documentation.ird.fr/hor/fdi:010086389
%> https://www.documentation.ird.fr/intranet/publi/2022-12/010086389.pdf
%V 208
%W Horizon (IRD)
%X The impacts of El Nin similar to o 2015-2016 on planktonic foraminiferal assemblages and particle fluxes (total mass, organic carbon, total nitrogen, and carbonate) were analyzed in a sediment trap record located at the entrance of the Gulf of California from 2015 to 2019. Biweekly data of the sea surface temperature (SST) and sea surface chlorophyll-a (Chl-a) were obtained from satellite images (MODIS-AQUA) during this period. Particle fluxes and planktonic foraminiferal assemblages reflected the seasonal cycles of SST and phytoplankton biomass highlighting the effects of El Nin similar to o 2015-2016. During neutral and La Nin similar to a conditions, winter-spring upwelling leads to low SST, high Chl-a and particle fluxes, and an assemblage dominated by Globigerina bulloides while the summers are characterized by high SST, low Chl-a and particle fluxes, and a Globorotaloides hexagonus assemblage. In contrast, in normal summers, there is an alternation of G. bulloides and Orbulina universa-Trilobatus sacculifer-Globigerinella siphonifera associations. By late autumn under La Nin similar to a conditions, the Globigerinita glutinata assemblage reflects the transition from warm to cold conditions and the beginning of the upwelling season. This general pattern was affected by El Nin similar to o during 2015-2016. From late summer 2015 to early winter 2016 (El Nin similar to o 2015-2016 maximum intensity), Globigerinoides tenellus dominated, reflecting the intrusion of warm and oligotrophic equatorial waters. These results show the strong influence of El Nin similar to o Southern Oscillation (ENSO) on oceanic dynamics and planktonic foraminiferal assemblages at the entrance of the Gulf of California, and allow for a better interpretation of the preservation of these anomalous warm events in the sedimentary record, which can provide a better understanding of the long-term variations and effects of ENSO.
%$ 032 ; 036