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Biogeochemical processes in land-ocean interfaces, surface estuaries, subterranean estuaries and sediment-water interface
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Air-water gas exchange in a shallow, microtidal estuary
Monday 7th @ 1350-1410, Conference Room 1
Bryce Van Dam* , Florida International University
Craig Tobias, University of Connecticut
James Edson, WHOI
Presenter Email: bvandam@fiu.edu |
| We combine a direct, eddy covariance determination of CO2 flux with in-situ pCO2 measurements in an effort to better refine gas transfer parameterizations in microtidal estuaries. Due in part to large variability in pCO2, our parameterization does not differ significantly from literature ones when assessed over annual scales. Over diel time scales, however, our measurements of gas transfer velocity diverge from literature values. In particular, we demonstrate large differences in measured gas transfer velocity between day and night. We discuss the importance of water-side convection on gas transfer, and asses the impact of different parameterizations on calculated CO2 evasion rates over different time scales. |
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