Initialization and dynamical stabilization of a cloud-resolving model
A multiscale cloud-resolving model (CRM) composed of the anelastic grid equations coupled to viscous turbulence subgrid equations for the wind velocity is presented along with an initialization and dynamical stabilization method named Insertion & Brownian Motion (IBM). The subgrid model avoi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Physics Open |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666032622000175 |
| _version_ | 1811337310020567040 |
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| author | Paul Krause Joseph Tribbia |
| author_facet | Paul Krause Joseph Tribbia |
| author_sort | Paul Krause |
| collection | DOAJ |
| description | A multiscale cloud-resolving model (CRM) composed of the anelastic grid equations coupled to viscous turbulence subgrid equations for the wind velocity is presented along with an initialization and dynamical stabilization method named Insertion & Brownian Motion (IBM). The subgrid model avoids the saturation of small scales. Its closure was driven by the assumption that the equilibrium law of energy production holds at small scales. The IBM method is shown to be effective in a 10-day long imperfect run with the CRM where the horizontal components of the grid velocity and the potential temperature are set to their reference value at the initial time. The model imperfection consists in a 30% raise in the heat transfer coefficient at surface, which directly impacts the potential temperature which is a control variable for the vertical component of the grid velocity. Future work will test the viability of the viscous turbulence equations as a subgrid model for global models that can be properly initialized and is less computationally demanding than 3D super-parametrization. |
| first_indexed | 2024-04-13T17:52:59Z |
| format | Article |
| id | doaj.art-04554683221f4ef5941aecd0010c51c7 |
| institution | Directory Open Access Journal |
| issn | 2666-0326 |
| language | English |
| last_indexed | 2024-04-13T17:52:59Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Open |
| spelling | doaj.art-04554683221f4ef5941aecd0010c51c72022-12-22T02:36:37ZengElsevierPhysics Open2666-03262022-09-0112100117Initialization and dynamical stabilization of a cloud-resolving modelPaul Krause0Joseph Tribbia1Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Correspondence to: Departamento de Matemática, Universidade Federal de Santa Catarina, Campus Universitário Trindade, CEP 88040-900, Florianópolis, SC, BrazilNational Center for Atmospheric Research, Boulder, CO, USAA multiscale cloud-resolving model (CRM) composed of the anelastic grid equations coupled to viscous turbulence subgrid equations for the wind velocity is presented along with an initialization and dynamical stabilization method named Insertion & Brownian Motion (IBM). The subgrid model avoids the saturation of small scales. Its closure was driven by the assumption that the equilibrium law of energy production holds at small scales. The IBM method is shown to be effective in a 10-day long imperfect run with the CRM where the horizontal components of the grid velocity and the potential temperature are set to their reference value at the initial time. The model imperfection consists in a 30% raise in the heat transfer coefficient at surface, which directly impacts the potential temperature which is a control variable for the vertical component of the grid velocity. Future work will test the viability of the viscous turbulence equations as a subgrid model for global models that can be properly initialized and is less computationally demanding than 3D super-parametrization.http://www.sciencedirect.com/science/article/pii/S2666032622000175Cloud-resolving modelAnelastic equationsViscous turbulence equationsDetermining variablesDynamical stabilization scheme |
| spellingShingle | Paul Krause Joseph Tribbia Initialization and dynamical stabilization of a cloud-resolving model Physics Open Cloud-resolving model Anelastic equations Viscous turbulence equations Determining variables Dynamical stabilization scheme |
| title | Initialization and dynamical stabilization of a cloud-resolving model |
| title_full | Initialization and dynamical stabilization of a cloud-resolving model |
| title_fullStr | Initialization and dynamical stabilization of a cloud-resolving model |
| title_full_unstemmed | Initialization and dynamical stabilization of a cloud-resolving model |
| title_short | Initialization and dynamical stabilization of a cloud-resolving model |
| title_sort | initialization and dynamical stabilization of a cloud resolving model |
| topic | Cloud-resolving model Anelastic equations Viscous turbulence equations Determining variables Dynamical stabilization scheme |
| url | http://www.sciencedirect.com/science/article/pii/S2666032622000175 |
| work_keys_str_mv | AT paulkrause initializationanddynamicalstabilizationofacloudresolvingmodel AT josephtribbia initializationanddynamicalstabilizationofacloudresolvingmodel |