Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay
12 páginas, 5 figuras, 1 tabla Atmospheric molar fraction of CO2 (xCO2atm) measurements obtained on board of ships of opportunity are used to parameterize the seasonal cycle of atmosphericxCO2 (xCO2atm) in three regions of the eastern North Atlantic (Galician and French offshore and Bay of Biscay)....
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Online Access: | http://hdl.handle.net/10261/50426 https://doi.org/10.1016/j.jmarsys.2006.05.010 |
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ftcsic:oai:digital.csic.es:10261/50426 2024-02-11T10:06:47+01:00 Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay Padín, X. A. Vázquez Rodríguez, Marcos Ríos, Aida F. Pérez, Fiz F. 2007 http://hdl.handle.net/10261/50426 https://doi.org/10.1016/j.jmarsys.2006.05.010 en eng Elsevier http://dx.doi.org/10.1016/j.jmarsys.2006.05.010 Journal of Marine Systems 66(1-4): 285-296 (2007) 0924-7963 http://hdl.handle.net/10261/50426 doi:10.1016/j.jmarsys.2006.05.010 open Carbon dioxide Air-sea exchanges Seasonal variations Bay of Biscay Ships of opportunity artículo http://purl.org/coar/resource_type/c_6501 2007 ftcsic https://doi.org/10.1016/j.jmarsys.2006.05.010 2024-01-16T09:38:07Z 12 páginas, 5 figuras, 1 tabla Atmospheric molar fraction of CO2 (xCO2atm) measurements obtained on board of ships of opportunity are used to parameterize the seasonal cycle of atmosphericxCO2 (xCO2atm) in three regions of the eastern North Atlantic (Galician and French offshore and Bay of Biscay). Three selection criteria are established to eliminate spurious values and identify xCO2atm data representative of atmospheric background values. The filtered data set is fitted to seasonal curve, consisting of an annual trend plus a seasonal cycle. Although the fitted curves are consistent with the seasonal evolution of xCO2atm data series from land meteorological stations, only ship-board measurements can report the presence of winter xCO2atm minimum on Bay of Biscay. Weekly air–sea CO2 flux differences (mmol C·m− 2 day− 1) produced by the several options of xCO2atm usually used (ship-board measurements, data from land meteorological stations and annually averaged values) were calculated in Bay of Biscay throughout 2003. Flux error using fitted seasonal curve relative to on board measurements was minimal, whereas land stations and annual means yielded random (− 0.2 ± 0.3 mmol C·m− 2·day− 1) and systematic (− 0.1 ± 0.4 mmol C·m− 2 day− 1), respectively. The effect of different available sources of sea level pressure, wind speed and transfer velocity were also evaluated. Wind speed and transfer velocity parameters are found as the most critical choice in the estimate of CO2 fluxes reaching a flux uncertainty of 7 mmol C·m− 2·day− 1 during springtime. The atmospheric pressure shows a notable relative effect during summertime although its influence is quantitatively slight on annual scale (0.3 ± 0.2 mmol C·m− 2·day− 1). All results confirms the role of the Bay of Biscay as CO2 sink for the 2003 with an annual mean CO2 flux around − 5 ± 5 mmol C m− 2 day− 1. This work was developed and funded within the ECO project (MCyT REN2002-00503/MAR) and the European Commission (EU FP6 CARBOOCEAN Integrated Project, Contract No. ... Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Journal of Marine Systems 66 1-4 285 296 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Carbon dioxide Air-sea exchanges Seasonal variations Bay of Biscay Ships of opportunity |
spellingShingle |
Carbon dioxide Air-sea exchanges Seasonal variations Bay of Biscay Ships of opportunity Padín, X. A. Vázquez Rodríguez, Marcos Ríos, Aida F. Pérez, Fiz F. Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
topic_facet |
Carbon dioxide Air-sea exchanges Seasonal variations Bay of Biscay Ships of opportunity |
description |
12 páginas, 5 figuras, 1 tabla Atmospheric molar fraction of CO2 (xCO2atm) measurements obtained on board of ships of opportunity are used to parameterize the seasonal cycle of atmosphericxCO2 (xCO2atm) in three regions of the eastern North Atlantic (Galician and French offshore and Bay of Biscay). Three selection criteria are established to eliminate spurious values and identify xCO2atm data representative of atmospheric background values. The filtered data set is fitted to seasonal curve, consisting of an annual trend plus a seasonal cycle. Although the fitted curves are consistent with the seasonal evolution of xCO2atm data series from land meteorological stations, only ship-board measurements can report the presence of winter xCO2atm minimum on Bay of Biscay. Weekly air–sea CO2 flux differences (mmol C·m− 2 day− 1) produced by the several options of xCO2atm usually used (ship-board measurements, data from land meteorological stations and annually averaged values) were calculated in Bay of Biscay throughout 2003. Flux error using fitted seasonal curve relative to on board measurements was minimal, whereas land stations and annual means yielded random (− 0.2 ± 0.3 mmol C·m− 2·day− 1) and systematic (− 0.1 ± 0.4 mmol C·m− 2 day− 1), respectively. The effect of different available sources of sea level pressure, wind speed and transfer velocity were also evaluated. Wind speed and transfer velocity parameters are found as the most critical choice in the estimate of CO2 fluxes reaching a flux uncertainty of 7 mmol C·m− 2·day− 1 during springtime. The atmospheric pressure shows a notable relative effect during summertime although its influence is quantitatively slight on annual scale (0.3 ± 0.2 mmol C·m− 2·day− 1). All results confirms the role of the Bay of Biscay as CO2 sink for the 2003 with an annual mean CO2 flux around − 5 ± 5 mmol C m− 2 day− 1. This work was developed and funded within the ECO project (MCyT REN2002-00503/MAR) and the European Commission (EU FP6 CARBOOCEAN Integrated Project, Contract No. ... |
format |
Article in Journal/Newspaper |
author |
Padín, X. A. Vázquez Rodríguez, Marcos Ríos, Aida F. Pérez, Fiz F. |
author_facet |
Padín, X. A. Vázquez Rodríguez, Marcos Ríos, Aida F. Pérez, Fiz F. |
author_sort |
Padín, X. A. |
title |
Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
title_short |
Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
title_full |
Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
title_fullStr |
Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
title_full_unstemmed |
Atmospheric CO2 measurements and error analysis on seasonal air-sea CO2 fluxes in the Bay of Biscay |
title_sort |
atmospheric co2 measurements and error analysis on seasonal air-sea co2 fluxes in the bay of biscay |
publisher |
Elsevier |
publishDate |
2007 |
url |
http://hdl.handle.net/10261/50426 https://doi.org/10.1016/j.jmarsys.2006.05.010 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1016/j.jmarsys.2006.05.010 Journal of Marine Systems 66(1-4): 285-296 (2007) 0924-7963 http://hdl.handle.net/10261/50426 doi:10.1016/j.jmarsys.2006.05.010 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.jmarsys.2006.05.010 |
container_title |
Journal of Marine Systems |
container_volume |
66 |
container_issue |
1-4 |
container_start_page |
285 |
op_container_end_page |
296 |
_version_ |
1790604727989305344 |