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v47	v48
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41	41	> B. Guenet [[BR]]
	42	It is not clear why Soenke used the Montheit and Unsworht 1990 equation to calculate diffusion coefficient but it perhaps because he defined afpsmax as a function of soil texture which is not coherent with what is done in Sechiba. Indeed, sechiba defined the porosity as a parameter (the field capacity that could be considered as a synonym for porosity). I suggest to use another equation to define oxygen diffusion coefficient based on Wania et al., 2010 in GMD. They define equations based on regression that takes into account the effect of soil water content on diffusion.
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43	44	2. '''Calculation of the oxygen partial pressure'''. For both the calculation of the gradient of oxygen partial pressure (d(pO2)/dz) and the change in oxygen partial pressure (d(pO2)/dt), we need dz, the depth over which one makes the calculation. It is not clear to me which depth one should use. For information, OCN used z_decomp (see [source:branches/orchidee-N/ORCHIDEE/src_stomate/stomate_soilcarbon.f90@19#L705 here])