Nava-Fernandez X. A., Machain-Castillo M. L., Sifeddine Abdelfettah, Mendez-Millan Mercedes, Caquineau Sandrine, Gibson K. A., Tappa E., Ruiz-Fernandez A. C., Sanchez-Cabeza J. A., Rodriguez-Ramirez A., Lara-Cera A. R. (2022). Planktonic foraminiferal assemblages and particle fluxes at the entrance of the Gulf of California highlight the effects of the strong El Niño 2015-2016. Progress in Oceanography, 208, p. 102880 [12 p.]. ISSN 0079-6611.
Titre du document
Planktonic foraminiferal assemblages and particle fluxes at the entrance of the Gulf of California highlight the effects of the strong El Niño 2015-2016
Année de publication
2022
Auteurs
Nava-Fernandez X. A., Machain-Castillo M. L., Sifeddine Abdelfettah, Mendez-Millan Mercedes, Caquineau Sandrine, Gibson K. A., Tappa E., Ruiz-Fernandez A. C., Sanchez-Cabeza J. A., Rodriguez-Ramirez A., Lara-Cera A. R.
Source
Progress in Oceanography, 2022,
208, p. 102880 [12 p.] ISSN 0079-6611
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.
Plan de classement
Limnologie physique / Océanographie physique [032]
;
Ecologie, systèmes aquatiques [036]
Description Géographique
PACIFIQUE EST ; ZONE TROPICALE ; CALFORNIE GOLFE
Localisation
Fonds IRD [F B010086389]
Identifiant IRD
fdi:010086389
