Ocean acidification studies and the uncertainties relevance on measurements of marine carbonate system properties

Perretti, Adriana Rodrigues; Albergaria-Barbosa, Ana Cecília Rizzatti de; Kerr, Rodrigo; Cunha, Letícia Cotrim da

doi:10.1590/s1679-87592018000706602

Cited by 6 publications

(6 citation statements)

References 49 publications

(49 reference statements)

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“…Furthermore, the GOA-ON reinforces the importance of the construction of biogeochemical databases with climate precision as good as what we have achieved [57]. Thus, these polynomial models are considered robust for C T and A T reconstruction in the South Atlantic basin and can contribute to filling the spatiotemporal gaps and allow reconstruction of marine carbonate system parameters with small uncertainties in the South Atlantic Ocean e.g., [67].…”

Section: Polynomial Models For Carbonate System Parameterssupporting

confidence: 59%

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

Orselli

Goyet²,

Kerr

et al. 2019

Climate

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The South Atlantic Ocean is currently undergoing significant alterations due to climate change. This region is important to the global carbon cycle, but marine carbon data are scarce in this basin. Additionally, this region is influenced by Agulhas eddies. However, their effects on ocean biogeochemistry are not yet fully understood. Thus, we aimed to model the carbonate parameters in this region and investigate the anthropogenic carbon (Cant) content in 13 eddies shed by the Agulhas retroflection. We used in situ data from the CLIVAR/WOCE/A10 section to elaborate total dissolved inorganic carbon (CT) and total alkalinity (AT) models and reconstruct those parameters using in situ data from two other Brazilian initiatives. Furthermore, we applied the Tracer combining Oxygen, inorganic Carbon, and total Alkalinity (TrOCA) method to calculate the Cant, focusing on the 13 identified Agulhas eddies. The CT and AT models presented root mean square errors less than 1.66 and 2.19 μmol kg−1, indicating Global Ocean Acidification Observing Network climate precision. The Cant content in the Agulhas eddies was 23% higher than that at the same depths of the surrounding waters. We observed that Agulhas eddies can play a role in the faster acidification of the South Atlantic Central Water.

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Section: Polynomial Models For Carbonate System Parameterssupporting

confidence: 59%

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

Orselli

Goyet²,

Kerr

et al. 2019

Climate

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“…The adsorption of CO 2 with ZrO 2 was performed as described in Scheme . The change of pH by the dilution of carbon dioxide in water was recorded as indicated in eq : 3 CO 2 + 3 H 2 O → 3 H 2 C O 3 H 2 O + H 2 CO 3 → H 3 O + + HCO 3 − H 2 O + HCO 3 2 − → H 3 O + + CO 3 2 − …”

Section: Resultsmentioning

confidence: 99%

Enhancement of the CO₂ Sensing/Capture through High Cationic Charge in M-ZrO₂ (Li⁺, Mg²⁺, or Co³⁺): Experimental and Theoretical Studies

Rojas

Huerta-Aguilar

Navarrete

et al. 2023

ACS Appl. Mater. Interfaces

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The capture and storage of CO2 are of growing interest in atmospheric science since greenhouse gas emission has to be reduced considerably in the near future. The present paper deals with the doping of cations on ZrO2, i.e., M-ZrO2 (M = Li+, Mg2+, or Co3+), defecting the crystalline planes for the adsorption of carbon dioxide. The samples were prepared by the sol–gel method and characterized completely by different analytical methods. The deposition of metal ions on ZrO2 (whose crystalline phases: monoclinic and tetragonal are transformed into a single-phase such as tetragonal for LiZrO2 and cubic for MgZrO2 or CoZrO2) shows a complete disappearance of the XRD monoclinic signal, and it is consistent with HRTEM lattice fringes: 2.957 nm for ZrO2 (101, tetragonal/monoclinic), 3.018 nm for tetragonal LiZrO2, 2.940 nm for cubic MgZrO2, and 1.526 nm for cubic CoZrO2. The samples are thermally stable, resulting an average size of ∼5.0–15 nm. The surface of LiZrO2 creates the oxygen deficiency, while for Mg2+ (0.089 nm), since the size of the atom is relatively greater than that of Zr4+ (0.084 nm), the replacement of Zr4+ by Mg2+ in sublattice is difficult; thus, a decrease of the lattice constant was noticed. Since the high band gap energy (ΔE > 5.0 eV) is suitable for CO2 adsorption, the samples were employed for the selective detection/capture of CO2 by using electrochemical impedance spectroscopy (EIS) and direct current resistance (DCR), showing that CoZrO2 is capable of CO2 capture about 75%. If M+ ions are deposited within the ZrO2 matrix, then the charge imbalance allows CO2 to interact with the oxygen species to form CO3 2– which produces a high resistance (21.04 × 106 (Ω, Ohm)). The adsorption of CO2 with the samples was also theoretically studied showing that the interaction of CO2 with MgZrO2 and CoZrO2 is more feasible than with LiZrO2, subscribing to the experimental data. The temperature effect (273 to 573 K) for the interaction of CO2 with CoZrO2 was also studied by the docking method and observed the cubic structure is more stable at high temperatures as compared to the monoclinic geometry. Thus, CO2 would preferably interact with ZrO2 c (E R S = −19.29 kJ/mol) than for ZrO2 m (22.4 J/mmol (ZrO2 c = cubic; ZrO2 m = monoclinic).

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“…In addition to these local and regional pressures, the predicted impacts of climate change on Blue Amazon ecosystems, such as warming (Magris et al, 2015), ocean and coastal acidification (Cotovicz Jr. et al, 2018b;Perretti et al, 2018), rising sea levels (Godoy and Lacerda, 2015), and droughts (Marengo et al, 2017;Soares et al, 2021), also enhance the risks associated with the degradation of BCEs and changes in the coverage of BC areas (e.g., retraction and expansion of mangroves) (Lacerda et al, 2019). Thus, the impacts of climate change on BCEs and their C stocks are dependent on exposure to climate change factors and land use practices (Macreadie et al, 2019;O´Connor et al, 2019).…”

Section: Impacts and Protection Of The Bces Sequestrationmentioning

confidence: 99%

Blue Carbon Ecosystems in Brazil: Overview and an Urgent Call for Conservation and Restoration

et al. 2022

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In this article, we discuss knowledge and gaps regarding blue carbon ecosystems (BCEs) in Brazil, considering the urgency to apply protection actions and policies to safeguard their biodiversity and associated ecosystem services. We also indicate areas of further research to improve carbon stocks and sequestration rate estimates. We call attention to the shortage of studies on Brazilian BCEs relative to the growing knowledge on the Blue Carbon Framework accumulated worldwide over the last decade. Considering the extensive Brazilian Economic Exclusive Zone (known as “Blue Amazon”), knowledge concerning blue carbon stocks is vital at regional and global scales for mitigating global increases in atmospheric carbon dioxide (CO2). The Blue Amazon has at least 1,100,000 ha of vegetated and non-vegetated coastal ecosystems (mangroves, salt marshes, seagrass meadows, and hypersaline tidal flats) that collectively contain vast amounts of stored carbon, making Brazil an ideal place to test mechanisms for evaluating, conserving, and restoring BCEs. Other poorly understood potential sinks and sources of carbon are macroalgal and rhodolith beds, mudflats, continental shelf sediments, and marine animal forests in shallow, mesophotic, and deep waters. The carbon fluxes between diverse environmental compartments, such as soil–air, soil–water, groundwater–water–surface water, air–water, and land–ocean, in BCEs across the Blue Amazon must be studied. We emphasize the importance of assessing the total carbon stock and the recent dismantling of environmental laws that pose great risks to these important BCEs. The conservation and recovery of these areas would enhance the carbon sequestration capacity of the entire country. Furthermore, we highlight priorities to improve knowledge concerning BCEs and their biogeochemical cycles in the Blue Amazon and to provide information to assist in the reduction of atmospheric levels of CO2 for the United Nations Decade of Ocean Science (2021–2030).

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Ocean acidification studies and the uncertainties relevance on measurements of marine carbonate system properties

Cited by 6 publications

References 49 publications

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

Enhancement of the CO₂ Sensing/Capture through High Cationic Charge in M-ZrO₂ (Li⁺, Mg²⁺, or Co³⁺): Experimental and Theoretical Studies

Blue Carbon Ecosystems in Brazil: Overview and an Urgent Call for Conservation and Restoration

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Ocean acidification studies and the uncertainties relevance on measurements of marine carbonate system properties

Cited by 6 publications

References 49 publications

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

Enhancement of the CO2 Sensing/Capture through High Cationic Charge in M-ZrO2 (Li+, Mg2+, or Co3+): Experimental and Theoretical Studies

Blue Carbon Ecosystems in Brazil: Overview and an Urgent Call for Conservation and Restoration

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Enhancement of the CO₂ Sensing/Capture through High Cationic Charge in M-ZrO₂ (Li⁺, Mg²⁺, or Co³⁺): Experimental and Theoretical Studies