Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model
This paper is based on dust aerosol cycle modelling in the atmospheric model ALADIN (Aire Limitée Adaptation dynamique Développement InterNational) coupled with the EXternalised SURFace scheme SURFEX. Its main goal is to create an appropriate mineral dust emission parameterization compatible with th...
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ftdoajarticles:oai:doaj.org/article:75a4c9ba38eb42a4bca0ab128acab0f8 2023-05-15T13:06:23+02:00 Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model M. Mokhtari L. Gomes P. Tulet T. Rezoug 2012-05-01T00:00:00Z https://doi.org/10.5194/gmd-5-581-2012 https://doaj.org/article/75a4c9ba38eb42a4bca0ab128acab0f8 EN eng Copernicus Publications http://www.geosci-model-dev.net/5/581/2012/gmd-5-581-2012.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-5-581-2012 1991-959X 1991-9603 https://doaj.org/article/75a4c9ba38eb42a4bca0ab128acab0f8 Geoscientific Model Development, Vol 5, Iss 3, Pp 581-598 (2012) Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/gmd-5-581-2012 2022-12-30T22:56:41Z This paper is based on dust aerosol cycle modelling in the atmospheric model ALADIN (Aire Limitée Adaptation dynamique Développement InterNational) coupled with the EXternalised SURFace scheme SURFEX. Its main goal is to create an appropriate mineral dust emission parameterization compatible with the global database of land surface parameters ECOCLIMAP, and the Food and Agriculture Organization (FAO) soil type database in SURFEX. An improvement on the Dust Entrainment And Deposition scheme (DEAD) is proposed in this paper by introducing the geographical variation of surface soil size distribution, the Marticorena and Bergametti (1995) formulation of horizontal saltation flux and the Shao et al. (1996) formulation of sandblasting efficiency α . To show the importance of the modifications introduced in the DEAD, both sensitivity and comparative studies are conducted in 0 dimensions (0-D) and then in 3 dimensions (3-D) between the old DEAD and the new DEAD. The results of the 0-D simulations indicate that the revised DEAD scheme represents the dust source emission better, particularly in the Bodélé depression, and provides a reasonable friction threshold velocity. In 3-D simulations, small differences are found between the DEAD and the revised DEAD for the simulated Aerosol Optical Depth (AOD) compared with the AErosol RObotic NETwork (AERONET) photometer measurements available in the African Monsoon Multidisciplinary Analyses (AMMA) databases. For the surface concentration, a remarkable improvement is noted for the revised DEAD scheme. Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Geoscientific Model Development 5 3 581 598 |
institution |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 M. Mokhtari L. Gomes P. Tulet T. Rezoug Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
topic_facet |
Geology QE1-996.5 |
description |
This paper is based on dust aerosol cycle modelling in the atmospheric model ALADIN (Aire Limitée Adaptation dynamique Développement InterNational) coupled with the EXternalised SURFace scheme SURFEX. Its main goal is to create an appropriate mineral dust emission parameterization compatible with the global database of land surface parameters ECOCLIMAP, and the Food and Agriculture Organization (FAO) soil type database in SURFEX. An improvement on the Dust Entrainment And Deposition scheme (DEAD) is proposed in this paper by introducing the geographical variation of surface soil size distribution, the Marticorena and Bergametti (1995) formulation of horizontal saltation flux and the Shao et al. (1996) formulation of sandblasting efficiency α . To show the importance of the modifications introduced in the DEAD, both sensitivity and comparative studies are conducted in 0 dimensions (0-D) and then in 3 dimensions (3-D) between the old DEAD and the new DEAD. The results of the 0-D simulations indicate that the revised DEAD scheme represents the dust source emission better, particularly in the Bodélé depression, and provides a reasonable friction threshold velocity. In 3-D simulations, small differences are found between the DEAD and the revised DEAD for the simulated Aerosol Optical Depth (AOD) compared with the AErosol RObotic NETwork (AERONET) photometer measurements available in the African Monsoon Multidisciplinary Analyses (AMMA) databases. For the surface concentration, a remarkable improvement is noted for the revised DEAD scheme. |
format |
Article in Journal/Newspaper |
author |
M. Mokhtari L. Gomes P. Tulet T. Rezoug |
author_facet |
M. Mokhtari L. Gomes P. Tulet T. Rezoug |
author_sort |
M. Mokhtari |
title |
Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
title_short |
Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
title_full |
Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
title_fullStr |
Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
title_full_unstemmed |
Importance of the surface size distribution of erodible material: an improvement on the Dust Entrainment And Deposition (DEAD) Model |
title_sort |
importance of the surface size distribution of erodible material: an improvement on the dust entrainment and deposition (dead) model |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/gmd-5-581-2012 https://doaj.org/article/75a4c9ba38eb42a4bca0ab128acab0f8 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Geoscientific Model Development, Vol 5, Iss 3, Pp 581-598 (2012) |
op_relation |
http://www.geosci-model-dev.net/5/581/2012/gmd-5-581-2012.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-5-581-2012 1991-959X 1991-9603 https://doaj.org/article/75a4c9ba38eb42a4bca0ab128acab0f8 |
op_doi |
https://doi.org/10.5194/gmd-5-581-2012 |
container_title |
Geoscientific Model Development |
container_volume |
5 |
container_issue |
3 |
container_start_page |
581 |
op_container_end_page |
598 |
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1766003311571369984 |