Hood, E Maria; Merlivat, Liliane (2001): Atmospheric and seawater carbon dioxide at time series station DYFAMED. PANGAEA, https://doi.org/10.1594/PANGAEA.738670, Supplement to: Hood, EM; Merlivat, L (2001): Annual to interannual variations of fCO2 in the northwestern Mediterranean Sea: Results from hourly measurements made by CARIOCA buoys, 1995-1997. Journal of Marine Research, 59(1), 113-131, https://doi.org/10.1357/002224001321237399
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A time series of fCO2, SST, and fluorescence data was collected between 1995 and 1997 by a CARIOCA buoy moored at the DyFAMed station (Dynamique des Flux Atmospheriques en Mediterranée) located in the northwestern Mediterranean Sea. On seasonal timescales, the spring phytoplankton bloom decreases the surface water fCO2 to approximately 290 µatm, followed by summer heating and a strong increase in fCO2 to a maximum of approximately 510 µatm. While the DELTA fCO2 shows strong variations on seasonal timescales, the annual average air-sea disequilibrium is only 2 µatm. Temperature-normalized fCO2 shows a continued decrease in dissolved CO2 throughout the summer and fall at a rate of approximately 0.6 µatm/d. The calculated annual air-sea CO2 transfer rate is -0.10 to -0.15 moles CO2 m-2 y-1, with these low values reflecting the relatively weak wind speed regime and small annual air-sea fCO2 disequilibrium. Extrapolating this rate over the whole Mediterranean Sea would lead to a flux of approximately -3 * 10**12 to -4.5 * 10**12 grams C/y, in good agreement with other estimates. An analysis of the effects of sampling frequency on annual air-sea CO2 flux estimates showed that monthly sampling is adequate to resolve the annual CO2 flux to within approximately ±10 - 18% at this site. Annual flux estimates made using temperature-derived fCO2 based on the measured fCO2-SST correlations are in agreement with measurement-based calculations to within ± 7-10% (depending on the gas transfer parameterization used), and suggest that annual CO2 flux estimates may be reasonably well predicted in this region from satellite or model-derived SST and wind speed information.
Latitude: 43.416663 * Longitude: 7.014442
Date/Time Start: 1995-06-11T00:00:00 * Date/Time End: 1997-12-27T23:02:00
DYF_CARIOCA * Latitude Start: 43.416667 * Longitude Start: 7.014444 * Latitude End: 43.416660 * Longitude End: 7.014440 * Date/Time Start: 1995-06-11T00:00:00 * Date/Time End: 1997-12-27T23:02:00 * Campaign: DYFAMED * Basis: Time-series station * Method/Device: Mooring (long time) (MOORY)
Datasets listed in this publication series
- Hood, EM; Merlivat, L (2001): Atmospheric pressure and fugacity of carbon dioxide in air at time series station DYFAMED. https://doi.org/10.1594/PANGAEA.183901
- Hood, EM; Merlivat, L (2001): Temperature and fugacity of carbon dioxide in seawater at time series station DYFAMED. https://doi.org/10.1594/PANGAEA.183897