Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises
Measurements of CO2 parameters in and over the tropical Atlantic ocean have been made during the CITHER 1 cruise (January to March 1993). These observations are compared to the results obtained a decade earlier in the same area during the FOCAL experiment (1982-1984). The increase of atmospheric CO2 (1.3 to 1.5 ppm yr-1) is in agreement with the secular trend. The variation of CO2 fugacity, fCO2, in surface seawater is analysed and compared with variations of hydrographic conditions. The apparent increase of ocean surface fCO2 is somewhat higher than the atmospheric increase: during the 9-year period, the apparent increase of oceanic fCO2 is found to range from 22.5 to 24.9 µatm. A new estimate of air-sea CO2 flux in the Atlantic equatorial belt indicates that the oceanic source is enhanced in 1993 compared to 1984. An interannual change in total inorganic carbon, TCO2, through the accumulation of CO2 in the mixed layer is assessed and analysed in comparison with the fCO2 increase. The agreement between the evolutions of the two parameters of the oceanic CO2 system is acceptable by taking into account the uncertainties to estimate these evolutions.
Main Authors: | , , |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | P01 - Conservation de la nature et ressources foncières, 000 - Autres thèmes, |
Online Access: | http://agritrop.cirad.fr/576402/ http://agritrop.cirad.fr/576402/1/Tellus_1995_47B_70-85.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-cirad-fr-576402 |
---|---|
record_format |
koha |
spelling |
dig-cirad-fr-5764022022-04-22T15:03:44Z http://agritrop.cirad.fr/576402/ http://agritrop.cirad.fr/576402/ Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises. Oudot C., Ternon J.F., Lecomte Jérôme. 1995. Tellus. Series B, Chemical and physical meteorology, 47 (1-2) : 70-85.https://doi.org/10.1034/j.1600-0889.47.issue1.8.x <https://doi.org/10.1034/j.1600-0889.47.issue1.8.x> Researchers Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises Oudot, C. Ternon, J.F. Lecomte, Jérôme eng 1995 Tellus. Series B, Chemical and physical meteorology P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes Measurements of CO2 parameters in and over the tropical Atlantic ocean have been made during the CITHER 1 cruise (January to March 1993). These observations are compared to the results obtained a decade earlier in the same area during the FOCAL experiment (1982-1984). The increase of atmospheric CO2 (1.3 to 1.5 ppm yr-1) is in agreement with the secular trend. The variation of CO2 fugacity, fCO2, in surface seawater is analysed and compared with variations of hydrographic conditions. The apparent increase of ocean surface fCO2 is somewhat higher than the atmospheric increase: during the 9-year period, the apparent increase of oceanic fCO2 is found to range from 22.5 to 24.9 µatm. A new estimate of air-sea CO2 flux in the Atlantic equatorial belt indicates that the oceanic source is enhanced in 1993 compared to 1984. An interannual change in total inorganic carbon, TCO2, through the accumulation of CO2 in the mixed layer is assessed and analysed in comparison with the fCO2 increase. The agreement between the evolutions of the two parameters of the oceanic CO2 system is acceptable by taking into account the uncertainties to estimate these evolutions. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/576402/1/Tellus_1995_47B_70-85.pdf text cc_by_nc info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/4.0/ https://doi.org/10.1034/j.1600-0889.47.issue1.8.x 10.1034/j.1600-0889.47.issue1.8.x info:eu-repo/semantics/altIdentifier/doi/10.1034/j.1600-0889.47.issue1.8.x info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1034/j.1600-0889.47.issue1.8.x |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes |
spellingShingle |
P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes Oudot, C. Ternon, J.F. Lecomte, Jérôme Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
description |
Measurements of CO2 parameters in and over the tropical Atlantic ocean have been made during the CITHER 1 cruise (January to March 1993). These observations are compared to the results obtained a decade earlier in the same area during the FOCAL experiment (1982-1984). The increase of atmospheric CO2 (1.3 to 1.5 ppm yr-1) is in agreement with the secular trend. The variation of CO2 fugacity, fCO2, in surface seawater is analysed and compared with variations of hydrographic conditions. The apparent increase of ocean surface fCO2 is somewhat higher than the atmospheric increase: during the 9-year period, the apparent increase of oceanic fCO2 is found to range from 22.5 to 24.9 µatm. A new estimate of air-sea CO2 flux in the Atlantic equatorial belt indicates that the oceanic source is enhanced in 1993 compared to 1984. An interannual change in total inorganic carbon, TCO2, through the accumulation of CO2 in the mixed layer is assessed and analysed in comparison with the fCO2 increase. The agreement between the evolutions of the two parameters of the oceanic CO2 system is acceptable by taking into account the uncertainties to estimate these evolutions. |
format |
article |
topic_facet |
P01 - Conservation de la nature et ressources foncières 000 - Autres thèmes |
author |
Oudot, C. Ternon, J.F. Lecomte, Jérôme |
author_facet |
Oudot, C. Ternon, J.F. Lecomte, Jérôme |
author_sort |
Oudot, C. |
title |
Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
title_short |
Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
title_full |
Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
title_fullStr |
Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
title_full_unstemmed |
Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises |
title_sort |
measurements of atmospheric and oceanic co2 in the tropical atlantic: 10 years after the 1982-1984 focal cruises |
url |
http://agritrop.cirad.fr/576402/ http://agritrop.cirad.fr/576402/1/Tellus_1995_47B_70-85.pdf |
work_keys_str_mv |
AT oudotc measurementsofatmosphericandoceanicco2inthetropicalatlantic10yearsafterthe19821984focalcruises AT ternonjf measurementsofatmosphericandoceanicco2inthetropicalatlantic10yearsafterthe19821984focalcruises AT lecomtejerome measurementsofatmosphericandoceanicco2inthetropicalatlantic10yearsafterthe19821984focalcruises |
_version_ |
1758024542239850497 |