A decrease in the sink for atmospheric CO2 in the North Atlantic

Details A decrease in the sink for atmospheric CO2 in the North Atlantic A decrease in the sink for atmospheric CO2 in the North Atlantic

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3107306l&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 7, CiteID L07306

Mathematics

Logic

40

Oceanography: Biological And Chemical: Carbon Cycling, Global Change: Biogeochemical Processes (4805), Global Change: Oceans (4203), Oceanography: Biological And Chemical: Gases

Scientific paper

Global ocean carbon models and available syntheses of the oceanic CO2 flux suggest that the North Atlantic subpolar gyre (50°N-70°N, 80°W-10°W) is a region of increasing uptake of CO2 from the atmosphere, with the oceanic partial pressure of CO2 (pCO2) increasing more slowly than the atmospheric CO2 over time. Our analysis of available CO2 data shows that, on the contrary, seawater pCO2 has increased faster than the atmosphere in recent decades, especially in summer, resulting in a decrease in uptake from the atmosphere. A decrease in the biological productivity of the region may be the underlying cause of this trend. From the observed trend we estimated a significant decrease in the annual carbon uptake in this region.

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