Air-sea gas exchange of CO 2 and DMS in the North Atlantic by eddy covariance

We report the first simultaneous eddy covariance flux measurements of CO2 and dimethylsulfide (DMS) over the open ocean for two North Atlantic cruises. After normalization for Schmidt number, the two gases give essentially identical gas transfer coefficients and wind speed dependences for the wind s...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Miller, Scott D, Marandino, Christa A, De Bruyn, Warren, Saltzman, Eric S, McCormick, C.
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2009
Subjects:
Physical Sciences and Mathematics
air mass
autocatalytic
chlorine chemistry
Cl atoms
continental outflow
dimethylsulfide
marine aerosols
marine air
marine boundary layers
model estimates
model simulation
Saharan dust
tropical Atlantic
aerodynamics
aerosols
air pollution
boundary layers
chlorine
methane
ozone
atmospheric chemistry
aerosol
atmospheric pollution
boundary layer
catalysis
dust
environmental fate
marine atmosphere
troposphere
Atlantic islands
Atlantic Ocean
Cape Verde
Macaronesia
North Atlantic
Online Access:http://www.escholarship.org/uc/item/1b11r8vc
Description
Summary:We report the first simultaneous eddy covariance flux measurements of CO2 and dimethylsulfide (DMS) over the open ocean for two North Atlantic cruises. After normalization for Schmidt number, the two gases give essentially identical gas transfer coefficients and wind speed dependences for the wind speed range 2–10 ms−1. The data indicate a linear relationship between the gas transfer coefficient and mean wind speed, with measured gas transfer coefficients slightly above the Wanninkhof (1992) parameterization, particularly at low wind speeds.

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