Unexpected consequences of increasing CO2 and ocean acidity on marine production of DMS and CH2ClI: Potential climate impacts

Details Unexpected consequences of increasing CO2 and ocean acidity on marine production of DMS and CH2ClI: Potential climate impacts Unexpected consequences of increasing CO2 and ocean acidity on marine production of DMS and CH2ClI: Potential climate impacts

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3405710w&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 5, CiteID L05710

Mathematics

Logic

10

Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Hydrology: Climate Impacts, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912), Paleoceanography: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4805)

Scientific paper

Increasing atmospheric mixing ratios of CO2 have already lowered surface ocean pH by 0.1 units compared to preindustrial values and pH is expected to decrease an additional 0.3 units by the end of this century. Pronounced physiological changes in some phytoplankton have been observed during previous CO2 perturbation experiments. Marine microorganisms are known to consume and produce climate-relevant organic gases. Concentrations of (CH3)2S (DMS) and CH2ClI were quantified during the Third Pelagic Ecosystem CO2 Enrichment Study. Positive feedbacks were observed between control mesocosms and those simulating future CO2. Dimethyl sulfide was 26% (+/-10%) greater than the controls in the 2x ambient CO2 treatments, and 18% (+/-10%) higher in the 3xCO2 mesocosms. For CH2ClI the 2xCO2 treatments were 46% (+/-4%) greater than the controls and the 3xCO2 mesocosms were 131% (+/-11%) higher. These processes may help contribute to the homeostasis of the planet.

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