A prognostic turbulence scheme for the nonhydrostatic plume model ATHAM

Herzog et al presents a turbulence scheme for the Active Tracer High-resolution Atmospheric Model (ATHAM) to parameterize the effect of subgrid-scale turbulence. The presence of high tracer concentrations in a particle-laden plume is taken into account, as well as supersonic affects at low Mach numb...

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Bibliographic Details
Published inJournal of the atmospheric sciences Vol. 60; no. 22; pp. 2783 - 2796
Main Authors HERZOG, Michael, OBERHUBER, Josef M, GRAF, Hans-E
Format Journal Article
LanguageEnglish
Published Boston, MA American Meteorological Society 15.11.2003
Subjects
Atmosphere
Earth, ocean, space
Exact sciences and technology
External geophysics
Kinetics
Meteorology
Turbulence
Volcanic eruptions
efficiency
Volcanic eruption
Structure stability
Equation of motion
Atmosphere model
plumes
Scale effect
tracers
digital simulation
buoyancy
Modeling
Atmospheric dynamics
three-dimensional models
Internal structure
Turbulence scale
Turbulence energy
Height
Anisotropic turbulence
Kinetic energy
Exchange coefficient
high resolution
Mach number
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Summary:Herzog et al presents a turbulence scheme for the Active Tracer High-resolution Atmospheric Model (ATHAM) to parameterize the effect of subgrid-scale turbulence. The presence of high tracer concentrations in a particle-laden plume is taken into account, as well as supersonic affects at low Mach numbers. Numerical simulations of convective plumes of typical Plinian volcanic eruption with the nonhydrostatic plume model ATHAM reveal that a complex treatment of turbulent quantities is necessary in order to capture the bulk characteristics of the plume height, the horizontal extent, and plume development in time.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-4928
1520-0469
DOI:10.1175/1520-0469(2003)060<2783:APTSFT>2.0.CO;2