A parametric model of vertical eddy fluxes in the atmosphere

Louis, Jean-François

doi:10.1007/bf00117978

Cited by 2,233 publications

(1,446 citation statements)

References 18 publications

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“…Water vapour, cloud water, and tracers are advected by the semi-Lagrangian scheme of Williamson and Rasch (1994), while spectral Eulerian advection is applied to the other prognostic variables. Parameterization schemes for radiation (Fouquart and Bonnel, 1980;Morcrette, 1991;van Dorland et al, 1997), convection (Tiedtke, 1989), large-scale cloud formation (Roeckner, 1995), land surface processes, orographic gravity wave drag (Miller et al, 1989), and vertical turbulent diffusion (Louis, 1979;Brinkop and Roeckner, 1995) are employed. The model version described here (E39) includes an improved parameterization of water vapour pressure over ice (Sonntag, 1994).…”

Section: Model Descriptionmentioning

confidence: 99%

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Results of an interactively coupled atmospheric chemistry – general circulation model: Comparison with observations

et al. 2001

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Abstract.The coupled climate-chemistry model ECHAM4.L39(DLR)/CHEM is presented which enables a simultaneous treatment of meteorology and atmospheric chemistry and their feedbacks. This is the first model which interactively combines a general circulation model with a chemical model, employing most of the important reactions and species necessary to describe the stratospheric and upper tropospheric ozone chemistry, and which is computationally fast enough to allow long-term integrations with currently available computer resources. This is possible as the model time-step used for the chemistry can be chosen as large as the integration time-step for the dynamics. Vertically the atmosphere is discretized by 39 levels from the surface up to the top layer which is centered at 10 hPa, with a relatively high vertical resolution of approximately 700 m near the extra-tropical tropopause. We present the results of a control simulation representing recent conditions (1990) and compare it to available observations. The focus is on investigations of stratospheric dynamics and chemistry relevant to describe the stratospheric ozone layer.ECHAM4.L39(DLR)/CHEM reproduces main features of stratospheric dynamics in the arctic vortex region, including stratospheric warming events. This constitutes a major improvement compared to earlier model versions. However, apparent shortcomings in antarctic circulation and temperatures persist. The seasonal and interannual variability of the ozone layer is simulated in accordance with observations. Activation and deactivation of chlorine in the polar stratospheric vortices and their inter-hemispheric differences are reproduced. Considering methane oxidation as part of the dynamic-chemistry feedback results in an improved representation of the spatial distribution of stratospheric water vapour concentrations.The current model constitutes a powerful tool to investigate, for instance, the combined direct and indirect effects of anthropogenic trace gas emissions. Key words. Atmospheric composition and structure (mid-Correspondence to: M. Dameris (martin.dameris@dlr.de) dle atmosphere -composition and chemistry) -Meteorology and atmospheric dynamics (general circulation; middle atmosphere dynamics)

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Section: Model Descriptionmentioning

confidence: 99%

“…with a carbon dioxide (CO 2 ) concentration of 353 ppmv, sea surface temperatures prescribed to the average of the years 1979(Gates, 1992, and chemical boundary conditions representative for the beginning 1990s (Table 3). After a spin-up period of 4 years, the model is integrated over 20 annual cycles in quasi-equilibrium mode.…”

Section: Model Descriptionmentioning

confidence: 99%

Results of an interactively coupled atmospheric chemistry – general circulation model: Comparison with observations

et al. 2001

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“…In addition, sensible and latent heat fluxes are computed according to the relationships developed by Louis (1979). The net surface longwave radiative flux is computed with a simplified transmission model that treats emission and absorption in combined spectral bands.…”

Section: Hydrodynamic Modelmentioning

confidence: 99%

3-D Hydrodynamic Modeling in a Geospatial Framework

Bollinger

Garrett

Koffman

et al. 2008

Journal of Map & Geography Libraries

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Abstract3-D hydrodynamic models are used by the Savannah River National Laboratory (SRNL) to simulate the transport of thermal and radionuclide discharges in coastal estuary systems. Development of such models requires accurate bathymetry, coastline, and boundary condition data in conjunction with the ability to rapidly discretize model domains and interpolate the required geospatial data onto the domain. To facilitate rapid and accurate hydrodynamic model development, SRNL has developed a pre-and postprocessor application in a geospatial framework to automate the creation of models using existing data. This automated capability allows development of very detailed models to maximize exploitation of available surface water radionuclide sample data and thermal imagery.4

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“…For the sake of space, we do not reproduce the equations of these models. H denotes the convective contribution due to sensible heat; it is predicted by Louis (1979). L l is the latent heat and is given by the model of Noilhan and Planton (1989).…”

Section: F Cs (T S T) = R Net (T S T) -[H(t S T) + L L (T S T)mentioning

confidence: 99%

OSIrIS: a physically based simulation tool to improve training in thermal infrared remote sensing over urban areas at high spatial resolution

Poglio

Mathieu-Marni²,

Ranchin

et al. 2006

Remote Sensing of Environment

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. OSIrIS: a physically based simulation tool to improve training in thermal infrared remote sensing over urban areas at high spatial resolution. Remote Sensing of Environment, Elsevier, 2006, 104, pp.238-246. <10.1016/j.rse.2006 a physically based simulation tool to improve training in thermal infrared remote sensing over urban areas at high spatial resolution. Remote Sensing of Environment, 104, 238-246, 2006Environment, 104, 238-246, , doi:10.1016Environment, 104, 238-246, /j.rse.2006 AbstractThis paper describes an infrared image simulator for remote sensing applications, called OSIrIS Examples are given that illustrate specific aspects of infrared images.

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A parametric model of vertical eddy fluxes in the atmosphere

Cited by 2,233 publications

References 18 publications

Results of an interactively coupled atmospheric chemistry – general circulation model: Comparison with observations

Results of an interactively coupled atmospheric chemistry – general circulation model: Comparison with observations

3-D Hydrodynamic Modeling in a Geospatial Framework

OSIrIS: a physically based simulation tool to improve training in thermal infrared remote sensing over urban areas at high spatial resolution

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