Interactive comment on “ Development of a parameterization scheme for calculating dry deposition velocity of fine , coarse and giant particles ” by L . Zhang and
نویسنده
چکیده
RC 1. The Eq.1, which underlies the considerations, is wrong and has been disproven in several publications. Already Slinn and Slinn (1980) derived a more appropriate equation for dry deposition velocity with an artificial virtual resistance, which, unlike the Eq.1, satisfies the mass conservation requirement between the surface and reference height. However, it did not resolve the principal problem demonstrated by Venkatram and Pleim (1999). The essence is that the electrical analogy is not applicable to particles with noticeable sedimentation and cannot be made to comply by any means. This paradigm is valid exclusively for gases. With correct solutions available from recent publications, partly quoted by the authors, reviving the obsolete approach seems confusing.
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Interactive comment on “ Development of a parameterization scheme for calculating dry deposition velocity of fine , coarse and giant particles ” by L . Zhang and Z .
AC: We conducted some sensitivity tests but did not include the results in this discussion paper for the consideration of limiting the length of the paper. In the revised version, we have added a figure of the sensitivity test results and related discussions to address this comment. Briefly, the fitted parameters could change slightly and the modeled Vd using different log-normal size distribut...
متن کاملInteractive comment on “ Development of a parameterization scheme for calculating dry deposition velocity of fine , coarse and giant particles
1. Given the size distribution assumptions made here (the specific values of the median diameter and standard deviation) how universally applicable is this parameterization? Would the fitted parameters be identical for all other log-normal size distributions which might be characterized as “PM2.5”? or are these parameters only relevant if one assumes this specific size distribution? The authors...
متن کاملInteractive comment on “ Development of a parameterization scheme for calculating dry deposition velocity of fine , coarse and giant particles ” by
results from a more detailed model, but do they reproduce the REAL world?) What do these approx. mean in terms of applications in a model (regional/global) i.e. show results from an application of the approximations. Also maybe there could be some physical discussions of the functional forms (e.g. Eq. 5 are these models physically based and parsimonious?) The figures are rather poor in terms of...
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