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River to Reef: What is controlling coastal carbonate chemistry in a tropical marine environment?

Cryer, S., Brown, P., Felgate, S., Strong, J. A., Carvalho, F., Flohr, A., Loucaides, S., Andrews, G., Rosado, S., Young, A., Sanders, R., Evans, C. (2023): River to Reef: What is controlling coastal carbonate chemistry in a tropical marine environment?, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3303

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019697 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019697_1

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Cryer, Sarah¹, Autor
Brown, Peter¹, Autor
Felgate, Stacey¹, Autor
Strong, James Asa¹, Autor
Carvalho, Filipa¹, Autor
Flohr, Anita¹, Autor
Loucaides, Socratis¹, Autor
Andrews, Gilbert¹, Autor
Rosado, Samir¹, Autor
Young, Arlene¹, Autor
Sanders, Richard¹, Autor
Evans, Claire¹, Autor

Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304

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Zusammenfassung: The coastal ocean, the interface between the land and sea is a key environment for the biogeochemical cycling of carbon, yet these heterogeneous environments are historically under sampled. It is now becoming apparent that anthropogenic CO₂ induced ocean acidification is an open ocean syndrome and that ocean acidification in the coastal environments is far more complex. In the coastal ocean several processes will drive CO₂ trends, such as seawater temperature, biological processes, residence time and air to sea gas exchange. We investigate the distribution and fate of inorganic carbon in a tropical coastal environment, influenced by riverine discharge and local marine habitats – coral reefs, seagrass beds and mangroves. The Belize River, which drains the largest catchment in Belize, discharges just north of Belize City and is a source of high pCO₂ (>2000 µatm) water to the coastal environment. We investigate the process that occur once this low pH (<7.6) water enters the coastal ocean and whether this low pH water, which is corrosive to corals (Ω_arag <1), reaches the barrier reef. Using a combination of sensor measurements and discrete samples, we found no evidence that river water reaches the barrier reef, located ~20km offshore. This was due to a number of processes occurring in the coastal ocean, including outgassing of CO₂ to the atmosphere and high rates of photosynthesis taking place, likely from benthic seagrass beds.

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Sprache(n): eng - Englisch

Datum: Online veröffentlicht: 2023Final veröffentlicht: 2023

Publikationsstatus: Final veröffentlicht

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Identifikatoren: DOI: 10.57757/IUGG23-3303

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

Veranstaltungsort: Berlin

Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

Genre der Quelle: Konferenzband

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Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences

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