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Climatic Constraints on Growth Rate and Geochemistry (Sr/Ca and U/Ca) of the Coral Siderastrea stellata in the Southwest Equatorial Atlantic (Rocas Atoll, Brazil)
SIFEDDINE, Abdel
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
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Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
SIFEDDINE, Abdel
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
LOGATO, R.
Laboratório de Radioecologia e Mudanças Globais [LARAMG]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Laboratório de Radioecologia e Mudanças Globais [LARAMG]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
NOGUEIRA, J.
Laboratório de Radioecologia e Mudanças Globais [LARAMG]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Laboratório de Radioecologia e Mudanças Globais [LARAMG]
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
TURCQ, Bruno
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
< Reduce
Universidade Federal Fluminense [Rio de Janeiro] [UFF]
Biogéochimie-Traceurs-Paléoclimat [BTP]
Language
EN
Article de revue
This item was published in
Geochemistry, Geophysics, Geosystems. 2018-03, vol. 19, n° 3, p. 772 - 786
English Abstract
Although relatively rare compared to similar latitudes in the Pacific or Indian Oceans, massive
coral colonies are present in the Tropical/Equatorial Southwestern Atlantic Ocean. However, detailed geochemical
compositions ...Read more >
Although relatively rare compared to similar latitudes in the Pacific or Indian Oceans, massive
coral colonies are present in the Tropical/Equatorial Southwestern Atlantic Ocean. However, detailed geochemical
compositions of these corals are still largely unknown. In this work, we present growth rates,
Sr/Ca, and U/Ca ratios of the coral colony (Siderastrea stellata) sampled at Rocas Atoll, off the Brazilian coast.
These variables are primarily affected by sea surface temperature (SST) at seasonal scale, and by wind stress
at interannual scale, these results represent a broad new finding. A lower significance at the interannual
time scale between Sr/Ca and U/Ca with respect to SST is attributed to the low SST amplitude closed to
Equator. An investigation on the dependence of coral growth rates with respect to the ‘‘cloud shading
effect’’ promoted by the Intertropical Convergence Zone (ITCZ) does not show significant influence.
Additionally, rain seems to act on local geochemistry of Sr/Ca ratios and growth rate at the decadal scale.Read less <
English Keywords
Equatorial Atlantic
ITCZ
Rocas Atoll
coral
Siderastrea stellata
wind stress