scholarly journals Cloud Process Coupling and Time Integration in the E3SM Atmosphere Model

2021 ◽  
Author(s):  
Sean Patrick Santos ◽  
Peter M. Caldwell ◽  
Christopher S. Bretherton
Keyword(s):  
Time Integration ◽  
Atmosphere Model ◽  
Cloud Process ◽  
Process Coupling

scholarly journals Cloud Process Coupling and Time Integration in the E3SM Atmosphere Model

2021 ◽  
Author(s):  
Sean Patrick Santos ◽  
Christopher Bretherton ◽  
Peter Caldwell
Keyword(s):  
Time Integration ◽  
Atmosphere Model ◽  
Cloud Process ◽  
Process Coupling

scholarly journals Cloud Process Coupling and Time Integration in the E3SM Atmosphere Model

2020 ◽  
Author(s):  
Sean Patrick Santos ◽  
Christopher Bretherton ◽  
Peter Caldwell
Keyword(s):  
Time Integration ◽  
Atmosphere Model ◽  
Cloud Process ◽  
Process Coupling

scholarly journals WAVETRISK-2.1: an adaptive dynamical core for ocean modelling

2021 ◽  
Author(s):  
Nicholas Keville-Reynolds Kevlahan ◽  
Florian Lemarié
Keyword(s):  
Free Surface ◽  
Shallow Water ◽  
Time Integration ◽  
Ocean Model ◽  
Mesh Adaptivity ◽  
Time Step ◽  
Vertical Coordinate ◽  
Slip Boundary ◽  
Modelling Framework ◽  
Atmosphere Model

Abstract. This paper introduces WAVETRISK-2.1 (i.e. WAVETRISK-OCEAN), an incompressible version of the atmosphere model wavetrisk-1.x with free-surface. This new model is built on the same wavelet-based dynamically adaptive core as wavetrisk, which itself uses DYNANICO's mimetic vector-invariant multilayer rotating shallow water formulation. Both codes use a Lagrangian vertical coordinate with conservative remapping. The ocean variant solves the incompressible multilayer shallow water equations with inhomogeneous density layers. Time integration uses barotropic--baroclinic mode splitting via an semi-implicit free surface formulation, which is about 34–44 times faster than an unsplit explicit time-stepping. The barotropic and baroclinic estimates of the free surface are reconciled at each time step using layer dilation. No slip boundary conditions at coastlines are approximated using volume penalization. The vertical eddy viscosity and diffusivity coefficients are computed from a closure model based on turbulent kinetic energy (TKE). Results are presented for a standard set of ocean model test cases adapted to the sphere (seamount, upwelling and baroclinic turbulence). An innovative feature of wavetrisk-ocean is that it could be coupled easily to the wavetrisk atmosphere model, thus providing a first building block toward an integrated Earth-system model using a consistent modelling framework with dynamic mesh adaptivity and mimetic properties.

WAVETRISK-OCEAN: an adaptive dynamical core for ocean modelling

2021 ◽  
Author(s):  
Kevlahan Nicholas
Keyword(s):  
Free Surface ◽  
Shallow Water ◽  
Time Integration ◽  
Ocean Model ◽  
Time Step ◽  
Vertical Coordinate ◽  
Modelling Framework ◽  
Standard Set ◽  
Atmosphere Model ◽  
Multilayer Shallow Water Equations

<p>This talk introduces WAVETRISK-OCEAN, an incompressible version of the atmosphere model WAVETRISK.  This new model is built on the same wavelet-based dynamically adaptive core as WAVETRISK, which itself uses DYNAMICO's mimetic vector-invariant multilayer shallow water formulation. Both codes use a Lagrangian vertical coordinate with conservative remapping.  The ocean variant solves the incompressible multilayer shallow water equations with a Ripa type thermodynamic treatment of horizontal density gradients.  Time integration uses barotropic-baroclinic mode splitting via an implicit free surface formulation, which is about 15 times faster than explicit time stepping.  The barotropic and baroclinic estimates of the free surface are reconciled at each time step using layer dilation. No slip boundary conditions at coastlines are approximated using volume penalization.  Results are presented for a standard set of ocean model test cases adapted to the sphere (seamount,  upwelling and baroclinic jet) as well as  turbulent wind-driven gyre flow in simplified geometries.  An innovative feature of WAVETRISK-OCEAN is that it could be coupled easily to the WAVETRISK atmosphere model, providing a simple integrated Earth system model using a consistent modelling framework.</p>

scholarly journals Improving Time Step Convergence in an Atmosphere Model With Simplified Physics: The Impacts of Closure Assumption and Process Coupling

2020 ◽  
Vol 12 (10) ◽  
Author(s):  
Hui Wan ◽  
Carol S. Woodward ◽  
Shixuan Zhang ◽  
Christopher J. Vogl ◽  
Panos Stinis ◽  
...  
Keyword(s):  
Time Step ◽  
Atmosphere Model ◽  
Process Coupling ◽  
Closure Assumption

Advances and Challenges in Time-Integration of PDE's

2003 ◽  
Author(s):  
David Gottlieb ◽  
Jan Hesthaven
Keyword(s):  
Time Integration

The Aeras Next Generation Global Atmosphere Model.

2016 ◽  
Author(s):  
Peter Andrew Bosler ◽  
Steven W. Bova ◽  
Irina P. Demeshko ◽  
Jeffrey A. Fike ◽  
Oksana Guba ◽  
...  
Keyword(s):  
Next Generation ◽  
Atmosphere Model
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