doi: 10.1073 / pnas.1618926114 Press release, USGS: Ocean Absorption of Carbon Dioxide More than Makes Up for Methane Emissions from Seafloor Methane Seeps (cage.uit.no)
CO2 then also feeds back via ocean absorption / outgassing regulated by SST's. (judithcurry.com)
Ocean absorption is a result of both the higher concentration of CO2 in the atmosphere and the alkaline nature of seawater (Note that this absorption that is leading to the «other» CO2 problem, ocean acidification — which may prove detrimental to coral reefs and other organisms that use carbonate). (realclimate.org)