Seasonal sea-surface carbon dioxide in the Azores area
The seasonal evolution of total inorganic carbon and CO2 air-sea fluxes in the Eastern North Atlantic Subtropical Gyre (Azores area) was investigated by means of studying a data set from 10 cruises covering a seasonal cycle. Monthly CO2 fugacity was modelled as a function of surface temperature and...
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ftird:oai:ird.fr:fdi:010069236 2024-09-15T18:24:26+00:00 Seasonal sea-surface carbon dioxide in the Azores area Rios, A. F. Perez, F. F. Alvarez, M. Mintrop, L. Gonzalez Davila, M. Casiano, J. M. S. /Lefevre, Nathalie Watson, A. J. 2005 https://www.documentation.ird.fr/hor/fdi:010069236 EN eng https://www.documentation.ird.fr/hor/fdi:010069236 oai:ird.fr:fdi:010069236 Rios A. F., Perez F. F., Alvarez M., Mintrop L., Gonzalez Davila M., Casiano J. M. S., Lefevre Nathalie, Watson A. J. Seasonal sea-surface carbon dioxide in the Azores area. 2005, 96 (1-2), p. 35-51 CO2 fluxes seasonal variability advection mixing air sea exchange biological activity Azores text 2005 ftird 2024-08-15T05:57:43Z The seasonal evolution of total inorganic carbon and CO2 air-sea fluxes in the Eastern North Atlantic Subtropical Gyre (Azores area) was investigated by means of studying a data set from 10 cruises covering a seasonal cycle. Monthly CO2 fugacity was modelled as a function of surface temperature and month for 1998. So, the seasonal cycle of CO2 and its air-sea fluxes were obtained using monthly average surface data in the area. Over the year, the Azores area (2.25 (.) 10(12) m(2)) acts as a weak net sink of CO2 (0.38 mmol m(-2) day(-1)). From December to May, the zone is a rather strong sink for CO2 (10.3 mmol m(-2) day(-1)), while between June and November, it behaves as a CO2 Source (9.9 mmol m(-2) day(-1)), August presents the highest outgassing (3.88 mmol m(-2) day(-1)). Moreover, a box budget was established to evaluate the relative contribution of the physical and biological processes affecting the seasonal CO2 variability in the mixed layer of the Azores area. The most important contributor to the average mass balance Of CO2 Was the mixing with the lower layer (7.8 mmol m(-2) day(-1)) and biological activity (-8.9 mmol m(-2) day(-1)). Conversely, air-sea exchange (0.17 mmol m(-2) day(-1)) and advection (1.7 mmol m(-2) day(-1)) contribute with a very small input. There is a strong coupling between biological activity, advection, and mixing in the mixed layer depth. The biological activity is supported by mixing and advection that provide CO2 and nutrients to the mixed layer, so we combine the three processes in only one term (Delta C-AMB) that represents the net biology production in the water column, and re-evaluated the CO2 mass balance to discriminate the importance of the physical and biological contributions. The effect of temperature, wind, and net biological process contribute in 42%, 12%, and 46%, respectively, to the explained variance of total CO2 mass balance in the upper layer. (c) 2004 Elsevier B.V. All rights reserved. Text North Atlantic IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
CO2 fluxes seasonal variability advection mixing air sea exchange biological activity Azores |
spellingShingle |
CO2 fluxes seasonal variability advection mixing air sea exchange biological activity Azores Rios, A. F. Perez, F. F. Alvarez, M. Mintrop, L. Gonzalez Davila, M. Casiano, J. M. S. /Lefevre, Nathalie Watson, A. J. Seasonal sea-surface carbon dioxide in the Azores area |
topic_facet |
CO2 fluxes seasonal variability advection mixing air sea exchange biological activity Azores |
description |
The seasonal evolution of total inorganic carbon and CO2 air-sea fluxes in the Eastern North Atlantic Subtropical Gyre (Azores area) was investigated by means of studying a data set from 10 cruises covering a seasonal cycle. Monthly CO2 fugacity was modelled as a function of surface temperature and month for 1998. So, the seasonal cycle of CO2 and its air-sea fluxes were obtained using monthly average surface data in the area. Over the year, the Azores area (2.25 (.) 10(12) m(2)) acts as a weak net sink of CO2 (0.38 mmol m(-2) day(-1)). From December to May, the zone is a rather strong sink for CO2 (10.3 mmol m(-2) day(-1)), while between June and November, it behaves as a CO2 Source (9.9 mmol m(-2) day(-1)), August presents the highest outgassing (3.88 mmol m(-2) day(-1)). Moreover, a box budget was established to evaluate the relative contribution of the physical and biological processes affecting the seasonal CO2 variability in the mixed layer of the Azores area. The most important contributor to the average mass balance Of CO2 Was the mixing with the lower layer (7.8 mmol m(-2) day(-1)) and biological activity (-8.9 mmol m(-2) day(-1)). Conversely, air-sea exchange (0.17 mmol m(-2) day(-1)) and advection (1.7 mmol m(-2) day(-1)) contribute with a very small input. There is a strong coupling between biological activity, advection, and mixing in the mixed layer depth. The biological activity is supported by mixing and advection that provide CO2 and nutrients to the mixed layer, so we combine the three processes in only one term (Delta C-AMB) that represents the net biology production in the water column, and re-evaluated the CO2 mass balance to discriminate the importance of the physical and biological contributions. The effect of temperature, wind, and net biological process contribute in 42%, 12%, and 46%, respectively, to the explained variance of total CO2 mass balance in the upper layer. (c) 2004 Elsevier B.V. All rights reserved. |
format |
Text |
author |
Rios, A. F. Perez, F. F. Alvarez, M. Mintrop, L. Gonzalez Davila, M. Casiano, J. M. S. /Lefevre, Nathalie Watson, A. J. |
author_facet |
Rios, A. F. Perez, F. F. Alvarez, M. Mintrop, L. Gonzalez Davila, M. Casiano, J. M. S. /Lefevre, Nathalie Watson, A. J. |
author_sort |
Rios, A. F. |
title |
Seasonal sea-surface carbon dioxide in the Azores area |
title_short |
Seasonal sea-surface carbon dioxide in the Azores area |
title_full |
Seasonal sea-surface carbon dioxide in the Azores area |
title_fullStr |
Seasonal sea-surface carbon dioxide in the Azores area |
title_full_unstemmed |
Seasonal sea-surface carbon dioxide in the Azores area |
title_sort |
seasonal sea-surface carbon dioxide in the azores area |
publishDate |
2005 |
url |
https://www.documentation.ird.fr/hor/fdi:010069236 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010069236 oai:ird.fr:fdi:010069236 Rios A. F., Perez F. F., Alvarez M., Mintrop L., Gonzalez Davila M., Casiano J. M. S., Lefevre Nathalie, Watson A. J. Seasonal sea-surface carbon dioxide in the Azores area. 2005, 96 (1-2), p. 35-51 |
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1810464793211961344 |