scholarly journals Implementing the HYbrid MAss flux Convection Scheme (HYMACS) in ICON – First idealized tests and adaptions to the dynamical core for local mass sources

2020 ◽  
Vol 146 (731) ◽  
pp. 2689-2716
Author(s):  
M. Langguth ◽  
V. Kuell ◽  
A. Bott
Keyword(s):  
Mass Flux ◽  
Convection Scheme ◽  
Dynamical Core ◽  
Local Mass ◽  
Mass Sources

scholarly journals Inherently mass-conservative version of the semi-Lagrangian Absolute Vorticity (SL-AV) atmospheric model dynamical core

2013 ◽  
Vol 6 (3) ◽  
pp. 4809-4832
Author(s):  
V. V. Shashkin ◽  
M. A. Tolstykh
Keyword(s):  
Baroclinic Instability ◽  
Mass Conservation ◽  
Atmospheric Model ◽  
Seasonal Forecasts ◽  
Absolute Vorticity ◽  
Dynamical Core ◽  
Local Mass ◽  
Local Mass Conservation ◽  
Long Time ◽  
Global And Local

Abstract. The semi-Lagrangian Absolute Vorticity (SL-AV) atmospheric model is the global semi-Lagrangian hydrostatic model used for operational medium-range and seasonal forecasts at Hydrometeorological centre of Russia. The distinct feature of SL-AV dynamical core is the semi-implicit semi-Lagrangian vorticity-divergence formulation on the unstaggered grid. Semi-implicit semi-Lagrangian approach allows for long time steps while violates the global and local mass-conservation. In particular, the total mass in simulations with semi-Lagrangian models can drift significantly if no aposteriori mass-fixing algorithms are applied. However, the global mass-fixing algorithms degrade the local mass conservation. The inherently mass-conservative version of SL-AV model dynamical core presented in the article ensures global and local mass conservation without mass-fixing algorithms. The mass conservation is achieved with the introduction of the finite-volume semi-Lagrangian discretization for continuity equation based on the 3-D extension of the conservative cascade semi-Lagrangian transport scheme (CCS). The numerical experiments show that the presented new version of SL-AV dynamical core combines the accuracy and stability of the standard SL-AV dynamical core with the mass-conservation properties. The results of the mountain induced Rossby wave test and baroclinic instability test for mass-conservative dynamical core are found to be in agreement with the results available in literature.

A mass-flux convection scheme for regional and global models

2001 ◽  
Vol 127 (573) ◽  
pp. 869-886 ◽  
Author(s):  
P. Bechtold ◽  
E. Bazile ◽  
F. Guichard ◽  
P. Mascart ◽  
E. Richard
Keyword(s):  
Mass Flux ◽  
Convection Scheme ◽  
Global Models

scholarly journals Inherently mass-conservative version of the semi-Lagrangian absolute vorticity (SL-AV) atmospheric model dynamical core

2014 ◽  
Vol 7 (1) ◽  
pp. 407-417 ◽  
Author(s):  
V. V. Shashkin ◽  
M. A. Tolstykh
Keyword(s):  
Baroclinic Instability ◽  
Mass Conservation ◽  
Atmospheric Model ◽  
Seasonal Forecasts ◽  
Absolute Vorticity ◽  
Dynamical Core ◽  
Local Mass ◽  
Local Mass Conservation ◽  
Long Time ◽  
Global And Local

Abstract. The semi-Lagrangian absolute vorticity (SL-AV) atmospheric model is the global semi-Lagrangian hydrostatic model used for operational medium-range and seasonal forecasts at the Hydrometeorological Centre of Russia. The distinct feature of the SL-AV dynamical core is the semi-implicit, semi-Lagrangian vorticity-divergence formulation on the unstaggered grid. A semi-implicit, semi-Lagrangian approach allows for long time steps but violates the global and local mass conservation. In particular, the total mass in simulations with semi-Lagrangian models can drift significantly if no a posteriori mass-fixing algorithm is applied. However, the global mass-fixing algorithms degrade the local mass conservation. The new inherently mass-conservative version of the SL-AV model dynamical core presented here ensures global and local mass conservation without mass-fixing algorithms. The mass conservation is achieved with the introduction of the finite-volume, semi-Lagrangian discretization for a continuity equation based on the 3-D extension of the conservative cascade semi-Lagrangian transport scheme (CCS). Numerical experiments show that the new version of the SL-AV dynamical core presented combines the accuracy and stability of the standard SL-AV dynamical core with the mass-conservation properties. The results of the mountain-induced Rossby-wave test and baroclinic instability test for the mass-conservative dynamical core are found to be in agreement with the results available in the literature.

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