Linear models average speed

A number of other functions have been proposed that relate piston velocity to wind speed. These are shown along with the Liss and Merlivat [59] relationship in Fig. 5. On the basis of TTO data from measurements in the Equatorial Atlantic using the radon deficiency method, Smethie et al. [62] proposed a linear relationship between wind speed and gas exchange. Wanninkhof [26] proposed a quadratic function and noted the effect of using an average wind speed when the dependence of exchange on wind speed is nonlinear. The relationship is for steady winds or short-term winds and was determined from the data for bomb 002 and the wind speed distribution around the global mean wind speed. The model predictions of Deacon [28], also shown in Fig. 5, are appropriate only to low wind speeds. 

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