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- W4229953352 abstract "Abstract. In mesoscale models (resolution ~1 km) used for regional dispersion of pollution plumes, the heat sources, the induced atmospheric convective motions and the volcanic emissions of gases and aerosols are all sub-grid scale processes (mostly true for effusive eruptions) which need to be parameterized. We propose a modified formulation of the EDMF scheme (Eddy Diffusivity-Mass Flux) proposed by Pergaud et al. (2009) which is based on a single updraft. It is used to represent volcano induced updrafts tested for a case study of January 2010 summit eruption of Piton de la Fournaise (PdF) volcano. The validation of this modified formulation using large eddy simulation (LES) focuses on the ability of the model to transport tracer concentrations up to 1–2 km in the lower troposphere as is the case of majority of PdF eruptions. The modelled volcanic plume agrees well with the SO2 (sulphur dioxide) tracer concentrations found with LES and a sensitivity test performed for the modified formulation of the EDMF scheme emphasizes the sensitivity of the parameterisation to entrainment at the plume base." @default.
- W4229953352 created "2022-05-11" @default.
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- W4229953352 date "2014-11-26" @default.
- W4229953352 modified "2023-09-27" @default.
- W4229953352 title "Simulations and parameterisation of shallow volcanic plumes of Piton de la Fournaise, La Réunion Island using Méso-NH version 4-9-3" @default.
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- W4229953352 doi "https://doi.org/10.5194/gmdd-7-8361-2014" @default.
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