Randy Holmes-Farley
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FWIW, this is the pure diffusion experiment I was referring to:
ieeexplore.ieee.org
“Abstract:Bucket experiments were conducted to measure the rate of diffusion of oxygen into sea water, stripped of dissolved oxygen to about 1 mg/1, of "homogeneous" salinity of 26-30\permil and with a "stable" temperature gradient. In five successive tests, the water required about 60 hours, under calm laboratory conditions, to exceed 7 mg/1 at all depths in the bucket. Results of these tests indicated input of oxygen to be much more rapid than expected from molecular diffusion of the Fickian type, giving a diffusion coefficient of 6 \times 10^{-3} cm 2 sec -1 compared to 2 \times 10^{-5} cm 2 sec -1 . It is suggested that evaporation in the thin water layer at the air/ water boundary increases the salinity sufficiently to initiate the transfer of oxygen from the atmosphere into sea water by convective movements, even in the presence of a stable temperature gradient and in the absence of turbulence”
![ieeexplore.ieee.org](/proxy.php?image=https%3A%2F%2Fieeexplore.ieee.org%2Fassets%2Fimg%2Fieee_logo_smedia_200X200.png&hash=ceb65b6e77984ac09c20ae3d4aecc2bc&return_error=1)
Diffusion of oxygen into still sea water
Bucket experiments were conducted to measure the rate of diffusion of oxygen into sea water, stripped of dissolved oxygen to about 1 mg/1, of "homogeneous" salinity of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">26-30\permil</tex> and with a...
“Abstract:Bucket experiments were conducted to measure the rate of diffusion of oxygen into sea water, stripped of dissolved oxygen to about 1 mg/1, of "homogeneous" salinity of 26-30\permil and with a "stable" temperature gradient. In five successive tests, the water required about 60 hours, under calm laboratory conditions, to exceed 7 mg/1 at all depths in the bucket. Results of these tests indicated input of oxygen to be much more rapid than expected from molecular diffusion of the Fickian type, giving a diffusion coefficient of 6 \times 10^{-3} cm 2 sec -1 compared to 2 \times 10^{-5} cm 2 sec -1 . It is suggested that evaporation in the thin water layer at the air/ water boundary increases the salinity sufficiently to initiate the transfer of oxygen from the atmosphere into sea water by convective movements, even in the presence of a stable temperature gradient and in the absence of turbulence”