AerSett v1.0: A simple and straightforward model for the settling speed of big spherical atmospheric aerosol
- 1LMD/IPSL, École Polytechnique, Institut Polytechnique de Paris, ENS, PSL Research University, Sorbonne Université, CNRS, Palaiseau France
- 2École des Ponts-ParisTech, Marne-la-Vallée, France
- 1LMD/IPSL, École Polytechnique, Institut Polytechnique de Paris, ENS, PSL Research University, Sorbonne Université, CNRS, Palaiseau France
- 2École des Ponts-ParisTech, Marne-la-Vallée, France
Abstract. This study introduces AerSett v1.0 (AERosol SETTling version 1.0), a model giving the settling speed of big spherical aerosols in the atmosphere without going through an iterative equation resolution. We prove that, for all spherical atmospheric aerosols with diameter D up to 1000 µm, this direct and explicit method based on the drag coefficient formulation of Clift and Gauvin (1971) gives results within 2 % of the exact solution obtained from numerical resolution of a non-linear fixed-point equation. This error is acceptable considering the uncertainties on the drag coefficient formulations themselves. For D < 100 µm, the error is below 0.5 %. We hope that with this simple and straightforward model, more Chemistry-Tranport models and General Circulation models will be able to take into account large-particle correction to the settling speed of big spherical aerosol particles in the atmosphere, without performing an iterative and time-consuming calculation.
Sylvain Mailler et al.
Status: final response (author comments only)
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RC1: 'Comment on gmd-2022-247', Anonymous Referee #1, 17 Nov 2022
The comment was uploaded in the form of a supplement: https://gmd.copernicus.org/preprints/gmd-2022-247/gmd-2022-247-RC1-supplement.pdf
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AC1: 'Reply on RC1', Sylvain Mailler, 13 Jan 2023
We are grateful to Anonymous Reviewer #1 for his/her careful Review of our manuscript. His/her review and that of Reviewer #2 helped us construct an enhanced version of the manuscript, with two new sections, one for including the slip correction factor in our method as suggested, one to quantify the performance improvement compared to other methods. Please find attached our detailed answer as well as the description of these modifications.
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AC1: 'Reply on RC1', Sylvain Mailler, 13 Jan 2023
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RC2: 'Comment on gmd-2022-247', Anonymous Referee #2, 24 Nov 2022
The comment was uploaded in the form of a supplement: https://gmd.copernicus.org/preprints/gmd-2022-247/gmd-2022-247-RC2-supplement.pdf
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AC2: 'Reply on RC2', Sylvain Mailler, 13 Jan 2023
We are grateful to Anonymous Reviewer #1 for his/her careful Review of our manuscript. His/her review and that of Reviewer #2 helped us construct an enhanced version of the manuscript, with two new sections, one for including the slip correction factor in our method as suggested, one to quantify the performance improvement compared to other methods.
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AC2: 'Reply on RC2', Sylvain Mailler, 13 Jan 2023
Sylvain Mailler et al.
Sylvain Mailler et al.
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