Comparison between eddy‐covariance and flux‐gradient size‐resolved dust fluxes during wind erosion events
RAJOT, J.‐l.
Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
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Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
RAJOT, J.‐l.
Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
BOUET, C.
Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
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Institut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Geophysical Research: Atmospheres. 2021-07-16, vol. 126, n° 13, p. 1-27
American Geophysical Union
Résumé en anglais
Estimating accurately dust emission flux during aeolian erosion events is crucial for quantifying the amount of dust in the atmosphere. The rare existing field experiments quantifying such flux were mainly performed using ...Lire la suite >
Estimating accurately dust emission flux during aeolian erosion events is crucial for quantifying the amount of dust in the atmosphere. The rare existing field experiments quantifying such flux were mainly performed using the flux-gradient (FG) method. Here, we present the first intercomparison of the size-resolved dust fluxes estimated by both the FG and the eddy-covariance (EC) methods during several erosion events. Both methods were applied simultaneously during the WIND-O-V (WIND erOsion in presence of sparse Vegetation)'s 2017 field experiment over an isolated erodible bare plot in South Tunisia. Overall, both methods predict similar dust fluxes for particle smaller than about 4 μm. For coarser particles, the EC method predicts a smaller dust flux than the FG method. Factors explaining this difference are discussed such as the different sampling heads used by the dust particle counters of both methods, or the possible weakening of the constant dust flux layer at the location of the upper dust particle counter of the FG method. This intercomparison highlights the difficulties and advantages of each method as well as their complementarity.< Réduire
Mots clés en anglais
flux-gradient
wind erosion
dust flux
eddy-covariance
Project ANR
Erosion éolienne en présence de végétation éparse - ANR-15-CE02-0013
Origine
Importé de halUnités de recherche