Journal
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Volume 120, Issue 12, Pages 6117-6144Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015JD023283
Keywords
dust mobilization; Lagrangian transport modeling; airborne dust measurements
Categories
Funding
- EUFAR
- EUFAR through an Education and Training activity
- NERC consortium grant [NE/G017166/1]
- ERC [257543]
- Agence Nationale de la Recherche (ANR)
- Institut National des Sciences de l'Univers (INSU/CNRS) through the LEFE program
- Centre National d'Etudes Spatiales (CNES) through the TOSCA program
- Meteo-France
- NERC [NE/G015937/1, NE/G017166/1] Funding Source: UKRI
- Natural Environment Research Council [NE/G017166/1, NE/G015937/1] Funding Source: researchfish
- European Research Council (ERC) [257543] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Due to the harshness and inaccessibility of desert regions, the uncertainties concerning the processes of dust mobilization at the surface, airborne transport, and sedimentation are still considerable, limiting the ability to perform model simulations. In June 2011, a comprehensive data set of ground-based and airborne in situ measurements and remote sensing observations was acquired within the Fennec/Lagrangian Dust Source Inversion Experiment (LADUNEX) field campaign in the western Sahara region. Here we evaluate the ability of the state-of-the-art Lagrangian particle dispersion model FLEXPART, newly fitted with a dust mobilization capability, to simulate dust transport in this region. We investigate a case where a large mesoscale convective system (MCS) triggered dust emissions in central Mali, which subsequently moved as a large cold pool dust front toward northern Mauritania. Specifying dust mobilization for this case is shown to be an important obstacle to simulating dust transport during this event, since neither the MCS nor the associated cold pool-causing dust emission is represented in the meteorological analysis. Obtaining a realistic dust transport simulation for this case therefore requires an inversion approach using a manual specification of the dust sources supported by satellite imagery. When compared to in situ and remote sensing data from two aircraft, the Lagrangian dust transport simulations represent the overall shape and evolution of the dust plume well. While accumulation and coarse mode dust are well represented in the simulation, giant mode particles are considerably underestimated. Our results re-emphasize that dust emission associated with deep moist convection remains a key issue for reliable dust model simulations in northern Africa.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available