Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic

The carbon system in the eastern tropical Atlantic remains poorly known. The variability and drivers of the carbon system are assessed using surface dissolved inorganic carbon (DIC), alkalinity (TA) and fugacity of CO<sub<2</sub< (fCO<sub<2</sub<) measured in the 12° N–12° S,...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Nathalie Lefèvre [verfasserIn] Carlos Mejia [verfasserIn] Dmitry Khvorostyanov [verfasserIn] Laurence Beaumont [verfasserIn] Urbain Koffi [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	carbon cycle tropical Atlantic dissolved inorganic carbon alkalinity

Übergeordnetes Werk:	In: Oceans - MDPI AG, 2021, 2(2021), 1, Seite 126-148
Übergeordnetes Werk:	volume:2 ; year:2021 ; number:1 ; pages:126-148

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/oceans2010008

Katalog-ID:	DOAJ071731180

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520			\|a The carbon system in the eastern tropical Atlantic remains poorly known. The variability and drivers of the carbon system are assessed using surface dissolved inorganic carbon (DIC), alkalinity (TA) and fugacity of CO<sub<2</sub< (fCO<sub<2</sub<) measured in the 12° N–12° S, 12° W–12° E region from 2005 to 2019. A relationship linking DIC to temperature, salinity and year has been determined, with salinity being the strongest predictor. The seasonal variations of DIC, ranging from 80 to 120 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup<, are more important than the year-to-year variability that is less than 50 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup< over the 2010–2019 period. DIC and TA concentrations are lower in the northern part of the basin where surface waters are fresher and warmer. Carbon supply dominates over biological carbon uptake during the productive upwelling period from July to September. The lowest DIC and TA are located in the Congo plume. The influence of the Congo is still observed at the mooring at 6° S, 8° E as shown by large salinity and chlorophyll variations. Nevertheless, this site is a source of CO<sub<2</sub< emissions into the atmosphere.
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callnumber-first	G - Geography, Anthropology, Recreation
author	Nathalie Lefèvre
spellingShingle	Nathalie Lefèvre misc GC1-1581 misc carbon cycle misc tropical Atlantic misc dissolved inorganic carbon misc alkalinity misc Oceanography Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic
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topic_title	GC1-1581 Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic carbon cycle tropical Atlantic dissolved inorganic carbon alkalinity
topic	misc GC1-1581 misc carbon cycle misc tropical Atlantic misc dissolved inorganic carbon misc alkalinity misc Oceanography
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title	Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic
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title_full	Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic
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title_sort	ocean circulation drives the variability of the carbon system in the eastern tropical atlantic
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title_auth	Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic
abstract	The carbon system in the eastern tropical Atlantic remains poorly known. The variability and drivers of the carbon system are assessed using surface dissolved inorganic carbon (DIC), alkalinity (TA) and fugacity of CO<sub<2</sub< (fCO<sub<2</sub<) measured in the 12° N–12° S, 12° W–12° E region from 2005 to 2019. A relationship linking DIC to temperature, salinity and year has been determined, with salinity being the strongest predictor. The seasonal variations of DIC, ranging from 80 to 120 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup<, are more important than the year-to-year variability that is less than 50 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup< over the 2010–2019 period. DIC and TA concentrations are lower in the northern part of the basin where surface waters are fresher and warmer. Carbon supply dominates over biological carbon uptake during the productive upwelling period from July to September. The lowest DIC and TA are located in the Congo plume. The influence of the Congo is still observed at the mooring at 6° S, 8° E as shown by large salinity and chlorophyll variations. Nevertheless, this site is a source of CO<sub<2</sub< emissions into the atmosphere.
abstractGer	The carbon system in the eastern tropical Atlantic remains poorly known. The variability and drivers of the carbon system are assessed using surface dissolved inorganic carbon (DIC), alkalinity (TA) and fugacity of CO<sub<2</sub< (fCO<sub<2</sub<) measured in the 12° N–12° S, 12° W–12° E region from 2005 to 2019. A relationship linking DIC to temperature, salinity and year has been determined, with salinity being the strongest predictor. The seasonal variations of DIC, ranging from 80 to 120 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup<, are more important than the year-to-year variability that is less than 50 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup< over the 2010–2019 period. DIC and TA concentrations are lower in the northern part of the basin where surface waters are fresher and warmer. Carbon supply dominates over biological carbon uptake during the productive upwelling period from July to September. The lowest DIC and TA are located in the Congo plume. The influence of the Congo is still observed at the mooring at 6° S, 8° E as shown by large salinity and chlorophyll variations. Nevertheless, this site is a source of CO<sub<2</sub< emissions into the atmosphere.
abstract_unstemmed	The carbon system in the eastern tropical Atlantic remains poorly known. The variability and drivers of the carbon system are assessed using surface dissolved inorganic carbon (DIC), alkalinity (TA) and fugacity of CO<sub<2</sub< (fCO<sub<2</sub<) measured in the 12° N–12° S, 12° W–12° E region from 2005 to 2019. A relationship linking DIC to temperature, salinity and year has been determined, with salinity being the strongest predictor. The seasonal variations of DIC, ranging from 80 to 120 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup<, are more important than the year-to-year variability that is less than 50 <inline-formula<μ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"<<semantics<<mi mathvariant="sans-serif"<μ</mi<</semantics<</math<</inline-formula<mol kg<sup<−1</sup< over the 2010–2019 period. DIC and TA concentrations are lower in the northern part of the basin where surface waters are fresher and warmer. Carbon supply dominates over biological carbon uptake during the productive upwelling period from July to September. The lowest DIC and TA are located in the Congo plume. The influence of the Congo is still observed at the mooring at 6° S, 8° E as shown by large salinity and chlorophyll variations. Nevertheless, this site is a source of CO<sub<2</sub< emissions into the atmosphere.
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title_short	Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic
url	https://doi.org/10.3390/oceans2010008 https://doaj.org/article/4ae66de1bd8c4529945aabf9fa5928ad https://www.mdpi.com/2673-1924/2/1/8 https://doaj.org/toc/2673-1924
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DIC and TA concentrations are lower in the northern part of the basin where surface waters are fresher and warmer. Carbon supply dominates over biological carbon uptake during the productive upwelling period from July to September. The lowest DIC and TA are located in the Congo plume. The influence of the Congo is still observed at the mooring at 6° S, 8° E as shown by large salinity and chlorophyll variations. 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