Oudot Claude, Andrié Chantal. (1989). Short-term changes in the partial pressure of CO2 in Eastern Tropical Atlantic surface seawater and in atmospheric CO2 mole fraction. Tellus, 41B, p. 537-553.
Titre du document
Short-term changes in the partial pressure of CO2 in Eastern Tropical Atlantic surface seawater and in atmospheric CO2 mole fraction
Année de publication
1989
Type de document
Article
Auteurs
Oudot Claude, Andrié Chantal
Source
Tellus, 1989,
41B, p. 537-553
Continuous monitoring of oceanic and atmospheric CO2 during periods of 8 to 12 days in two particular locations of the tropical Atlantic was carried out during June-August 1986. At the first location (convergence zone; about 5°N, 20°W), the ocean surface was generally slightly undersaturated with respect to the atmosphere, whereas at the second one (Guinea Dome; 12°N, 22°W), the ocean surface was an important source zone of CO2 for the atmosphere. The results of PCO2 in surface seawater, after correction of the temperature effect, show a decrease between morning and evening related to photosynthetic activity ... The net CO2 flux changes considerably during a short periode (8 to 12 days) in the same place, as does the gas transfer coefficient across the sea surface through the variation of the wind speed : the variability is about 80-90 %. The net CO2 flux calculated from mean data is lower (about 30%) than the net CO2 flux calculated from data taken over short time intervals. in the Guinea Dome area in summer, the net CO2 flux can be as hinh (1.8 mmol m-2-d-1) as in the equatorial area
