Decadal fCO(2) trends in global ocean margins and adjacent boundary current-influenced areas Academic Article uri icon


  • 2017. American Geophysical Union. All Rights Reserved. Determination of the rate of change of sea surface CO2 fugacity (fCO2) is important, as the fCO2 gradient between the atmosphere and the ocean determines the direction of CO2 flux and hence the fate of this greenhouse gas. Using a newly available, community-based global CO2 database (Surface Ocean CO2 Atlas Version 3 coastal data set) and a newly developed statistical method, we report that the global ocean margins (within 400km offshore, 30S70N) fCO2 temporal trends on decadal time scales (1.931.59atmyr1) closely follow the atmospheric fCO2 increase rate (1.900.06atmyr1) in the Northern Hemisphere but are lower (1.350.55atmyr1) in the Southern Hemisphere, reflecting dominant atmospheric forcing in conjunction with different warming rates in the two hemispheres. In addition to the atmospheric fCO2 forcing, a direct warming effect contributes more to fCO2 increase in the western boundary current-influenced areas, while intensified upwelling contributes more to fCO2 increase in eastern boundary current-influenced areas.

published proceedings


altmetric score

  • 2.85

author list (cited authors)

  • Wang, H., Hu, X., Cai, W., & Sterba-Boatwright, B.

citation count

  • 17

complete list of authors

  • Wang, Hongjie||Hu, Xinping||Cai, Wei-Jun||Sterba-Boatwright, Blair

publication date

  • September 2017