How long does precipitation inhibit wind erosion in the Sahel?
Abstract Simultaneous measurements of saltation, wind speed, and rainfall performed in Niger before, during, and after 18 rain events are used to investigate how rain events affect wind erosion in the Sahel. The results show that the inhibition of saltation is rapid but progressive after the beginni...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069324 |
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| author | G. Bergametti J. L. Rajot C. Pierre C. Bouet B. Marticorena |
| author_facet | G. Bergametti J. L. Rajot C. Pierre C. Bouet B. Marticorena |
| author_sort | G. Bergametti |
| collection | DOAJ |
| description | Abstract Simultaneous measurements of saltation, wind speed, and rainfall performed in Niger before, during, and after 18 rain events are used to investigate how rain events affect wind erosion in the Sahel. The results show that the inhibition of saltation is rapid but progressive after the beginning of a rain event. The decrease of sand transport during the rain event is better linked to the time elapsed from the beginning of the rain event rather than to the cumulative rainfall. In the Sahel, after a rain event, less than 12 h is necessary to almost fully restore the sand transport potential. Our results suggest that assuming that no sand transport and dust emission occur during the 12 h following the end of a rain event could be a reasonable alternative to existing parameterizations of the influence of soil moisture on the wind erosion threshold, at least for the Sahelian conditions. |
| format | Article |
| id | doaj-art-8d5036766b0d415bbffbbf0542fd3c35 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8d5036766b0d415bbffbbf0542fd3c352025-08-20T01:50:59ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143126643664910.1002/2016GL069324How long does precipitation inhibit wind erosion in the Sahel?G. Bergametti0J. L. Rajot1C. Pierre2C. Bouet3B. Marticorena4Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583 Université Paris‐Est Créteil and Université Paris Diderot, IPSL Paris FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583 Université Paris‐Est Créteil and Université Paris Diderot, IPSL Paris FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583 Université Paris‐Est Créteil and Université Paris Diderot, IPSL Paris FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583 Université Paris‐Est Créteil and Université Paris Diderot, IPSL Paris FranceLaboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583 Université Paris‐Est Créteil and Université Paris Diderot, IPSL Paris FranceAbstract Simultaneous measurements of saltation, wind speed, and rainfall performed in Niger before, during, and after 18 rain events are used to investigate how rain events affect wind erosion in the Sahel. The results show that the inhibition of saltation is rapid but progressive after the beginning of a rain event. The decrease of sand transport during the rain event is better linked to the time elapsed from the beginning of the rain event rather than to the cumulative rainfall. In the Sahel, after a rain event, less than 12 h is necessary to almost fully restore the sand transport potential. Our results suggest that assuming that no sand transport and dust emission occur during the 12 h following the end of a rain event could be a reasonable alternative to existing parameterizations of the influence of soil moisture on the wind erosion threshold, at least for the Sahelian conditions.https://doi.org/10.1002/2016GL069324wind erosionrainSaheldust emission |
| spellingShingle | G. Bergametti J. L. Rajot C. Pierre C. Bouet B. Marticorena How long does precipitation inhibit wind erosion in the Sahel? Geophysical Research Letters wind erosion rain Sahel dust emission |
| title | How long does precipitation inhibit wind erosion in the Sahel? |
| title_full | How long does precipitation inhibit wind erosion in the Sahel? |
| title_fullStr | How long does precipitation inhibit wind erosion in the Sahel? |
| title_full_unstemmed | How long does precipitation inhibit wind erosion in the Sahel? |
| title_short | How long does precipitation inhibit wind erosion in the Sahel? |
| title_sort | how long does precipitation inhibit wind erosion in the sahel |
| topic | wind erosion rain Sahel dust emission |
| url | https://doi.org/10.1002/2016GL069324 |
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