Inventory of water masses and carbonate system from Brazilian's northeast coast: Monitoring ocean acidification.

Autor: Ramos E Silva CA; Postgraduate Program in Oceans and Earth Dynamics, Geosciences Institute, Federal Fluminense University, Niterói, RJ, Brazil.; Marine Biology Department, Biology Institute, Federal Fluminense University, Niterói, RJ, Brazil.; Center of Studies on Water, Biomass, and Oil-NAB, Federal Fluminense University, Niterói, RJ, Brazil., Monteiro NSC; Postgraduate Program in Oceans and Earth Dynamics, Geosciences Institute, Federal Fluminense University, Niterói, RJ, Brazil., Cavalcante LM; Research and Development Center-Leopoldo Américo Miguez de Mello (CENPES), Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil., Junior WT; Research and Development Center-Leopoldo Américo Miguez de Mello (CENPES), Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil., Rocha Carneiro ME; Research and Development Center-Leopoldo Américo Miguez de Mello (CENPES), Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, Brazil., Soares de Souza FE; Agricultural School of Jundiaí, Federal University of Rio Grande do Norte, Jundiaí District, Macaíba, Rio Grande do Norte, Brazil., Borges Garcia CA; Chemistry Department, Federal University of Sergipe, University District Professor José Aloísio de Campos, São Cristovão, SE, Brazil., Damasceno RN; Center of Studies on Water, Biomass, and Oil-NAB, Federal Fluminense University, Niterói, RJ, Brazil., de Araújo Rocha A; Center of Studies on Water, Biomass, and Oil-NAB, Federal Fluminense University, Niterói, RJ, Brazil.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2022 Jul 26; Vol. 17 (7), pp. e0271875. Date of Electronic Publication: 2022 Jul 26 (Print Publication: 2022).
DOI: 10.1371/journal.pone.0271875
Abstrakt: This manuscript presents an inventory of the carbonate system from the main water masses comprising the marine current system on Brazil's northeast coast (South Atlantic Ocean). For this purpose, four transects were conducted with an approximate length of 357 km (each one) through the platform and continental slope of the Sergipe-Alagoas sedimentary basin. Water samples were then collected in vertical profiles measuring from 5 to 1,799 meters depth, totaling 34 stations. Total alkalinity, calcium, and total boron were obtained analytically from these samples and by relationships with salinity. Speciation and concentration of the carbonate system were obtained by means of thermodynamic modeling. The results revealed that the empirical models used to calculate the concentrations of TA, calcium and total boron showed relevant variation when compared to the analytical values (TA: 5.0-6.5%; Ca: 0.4-4.8%; BT: 7.0-18.9%). However, the speciation and concentration of the carbonate system (CA, DIC, [Formula: see text], CO2(aq), ΩCalc, and ΩArag) obtained from the empirical values of TA, calcium and total boron did not differ significantly from those obtained analytically (0.0-6.1%). On the other hand, the parameters of pH, [Formula: see text], [Formula: see text], CO2(aq), ρCO2, ΩCalc, and ΩArag varied significantly within the different water masses (p < 0.05). This study supports and encourages acidification monitoring projects in the South Atlantic Ocean, based on modeling the carbonate system parameters generated in real-time.
Competing Interests: The authors have read the journal’s policy and declare the following competing interests: This study and the MARSEAL Project were supported logistically and financially by PETROBRAS/CENPES. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
Databáze: MEDLINE
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