IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Print this page

Regionalized global budget of the CO2 exchange at the air-water interface in continental shelf seas
Laruelle, G.G.; Lauerwald, R.; Pfeil, B; Regnier, P. (2014). Regionalized global budget of the CO2 exchange at the air-water interface in continental shelf seas. Global Biogeochem. Cycles 28(11): 1199-1214.
In: Global Biogeochemical Cycles. American Geophysical Union: Washington, DC. ISSN 0886-6236; e-ISSN 1944-9224, more
Peer reviewed article  

Available in  Authors 

Author keywords
    CO2; coastal ocean; carbon cycle

Authors  Top 
  • Laruelle, G.G., more
  • Lauerwald, R., more
  • Pfeil, B
  • Regnier, P., more

    Over the past decade, estimates of the atmospheric CO2 uptake by continental shelf seas were constrained within the 0.18–0.45 Pg C yr-1 range. However, most of those estimates are based on extrapolations from limited data sets of local flux measurements (n?2 air-sea exchange of the shelf seas by extracting 3?·?106 direct surface ocean CO2 measurements from the global database SOCAT (Surface Ocean CO2 Atlas), atmospheric CO2 values from GlobalVIEW and calculating gas transfer rates using readily available global temperature, salinity, and wind speed fields. We then aggregate our results using a global segmentation of the shelf in 45 units and 152 subunits to establish a consistent regionalized CO2 exchange budget at the global scale. Within each unit, the data density determines the spatial and temporal resolutions at which the air-sea CO2 fluxes are calculated and range from a 0.5° resolution in the best surveyed regions to a whole unit resolution in areas where data coverage is limited. Our approach also accounts, for the first time, for the partial sea ice cover of polar shelves. Our new regionalized global CO2 sink estimate of 0.19?±?0.05 Pg C yr-1 falls in the low end of previous estimates. Reported to an ice-free surface area of 22?·?106?km2, this value yields a flux density of 0.7?mol C m-2?yr-1, ~40% more intense than that of the open ocean. Our results also highlight the significant contribution of Arctic shelves to this global CO2 uptake (0.07 Pg C yr-1).

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors