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Woods Hole Oceanographic Institution

Rachel Stanley

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Projects
» Estuarine Production

» Arctic Primary Production

» High-Resolution Net Community Production

» Intercalibration Study

» Noble Gas Mass Spectrometer

» Carbon Cycle in the Equatorial Pacific

» Air-Sea Gas Exchange

» Biological Production in the Sargasso Sea


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Air-Sea Gas Exchange Parameterizations from a Noble Gas Time-Series

Collaborators:
Dr. William Jenkins (WHOI)
Dr. Scott Doney (WHOI)
Dempsey E. Lott, III (WHOI)

 

Air-sea gas exchange, the flux of a gas across the ocean-water interface, is a major part of the biogeochemical cycle of many climatically important gases, such as CO2, N2O, DMS and O2. Air-sea gas exchange is very difficult to measure directly and thus parameterizations are commonly used that allow researches to calculate the bulk flux of a gas from some relatively easy to measure variables such as the wind speed. These parameterizations are used in all climate models as well as in many data-based studies. For example, in order to use a gas as a tracer, one must calculate the air-sea gas exchange flux of a gas. The importance of such parameterizations is underscored by the fact that the most widely used of the existing parameterizations, Wanninkhof (1992), has been cited 1000 times.  Nonetheless, existing parameterizations, including Wanninkhof (1992) have several significant shortcomings, perhaps most notably having an uncertainty of 25 to 50%. We are using the noble gas time-series in conjunction with one-dimensional numerical modeling (Stanley et al, 2006) in order to develop a new parameterization that has uncertainties of only 10%, that explicitly includes bubble processes, and that is based on monthly to seasonal time-scales, the time-scale that matches that of the biogeochemical cycles of many gases (Stanley et al, submitted).

 


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