DYNAMICO

Institution: Institut Pierre Simon Laplace, Paris, France

Model Metadata

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Description:

• hydrostatic, shallow-atmosphere

• icosahedral, hexagonal, C-grid, structured

• pressure-based hybrid terrain-following eta  coordinate

• Lorentz vertical staggering

• mass- and enstrophy-conserving finite differences based on the vector-invariant form (Sadourny, 1975 ; Ringler et al., 2010)

• explicit 4-th order dissipation

• Eulerian positive definite, slope-limited transport (Dubey et al., submitted)

Test Case Results

Pure Advection

• 1-1: 3D deformational flow
• 1-2: 3D Hadley-like meridional circulation
• 1-3: 2D solid-body rotation of cloud-like tracers in the presence of orography (not implemented)

Impact of orography on a non-rotating steady-state at rest: Hydrostatic scales

• 2-0-0: optional: Accuracy of the pressure-gradient calculation in presence of a mountain

Rotating planet: From hydrostatic to non-hydrostatic scales

• 2-1: Mountain waves over a Schär-type mountain on a small planet
• 2-2: Mountain waves over a Schär-type mountain on a small planet with wind shear (problem with implementation)
• 3-1: Non-orographic gravity waves on a small planet

Simple planet: From hydrostatic to non-hydrostatic scales

• 4-1-0 4-1-1 : Dry baroclinic instability on a shrinking planet

Simple moist interactions

• 4-2: Moist baroclinic instability with large-scale condensation
• 4-3: optional: Moist baroclinic instability with simplified physics forcings
• 5-1: Idealized tropical cyclone with simplified physics forcings

Complex moist interactions

• 5-2: optional: Idealized tropical cyclone with full physics package

Typical horizontal resolutions, physics and dynamics time steps, and dissipation coefficients:

Please replace the text below with the model-specific information. The text just serves as a guide. If the model uses an acronym to denote its typical horizontal resolution (e.g. ni48) please identify it in column 1 in the Table below. It will be especially helpful to list resolutions that approximate a grid spacing of 2 deg, 1.5 deg. 1 deg, 0.5 deg and 0.25 deg. These correspond to equatorial grid spacings of about 220 km, 165 km, 110 km, 55 km and 28 km, respectively, and represent the horizontal grid spacings recommended for the test cases.

Please list all resolution-dependent dissipation coefficients that are typically utilized at these resolutions (e.g. 4th-order diffusion coefficient, 2nd-order diffusion coefficient, divergence damping coefficient, ...)

If the dissipation method and its potential coefficent does not depend on the resolution (e.g. coefficient for a temporal Robert-Asselin filter in case of a leapfrog scheme, order of Shapiro filter, polar FFT filter, etc. ) please list the mechanism and its coefficient (if applicable) in the text here.

Information on the computational grid:

please insert figure of the grid, short description / keywords (e.g. icosahedral triangular grid, optimized via spring dynamics)

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References:

• URL to online description and documentation if available
• list of key papers

Members of this modeling group during DCMIP-2012 and room location:

Room: to be determined