A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation
Abstract The horizontal turbulence parameterization is vital for the intensity and structure forecasting of tropical cyclone (TC) in numerical weather prediction (NWP) models. The default two‐dimensional (2D) standard Smagorinsky model with a single universal constant in Weather and Research Forecas...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL110392 |
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| author | Xu Zhang Qijun Huang Yulong Ma |
| author_facet | Xu Zhang Qijun Huang Yulong Ma |
| author_sort | Xu Zhang |
| collection | DOAJ |
| description | Abstract The horizontal turbulence parameterization is vital for the intensity and structure forecasting of tropical cyclone (TC) in numerical weather prediction (NWP) models. The default two‐dimensional (2D) standard Smagorinsky model with a single universal constant in Weather and Research Forecasting (WRF) model has been proven to be over dissipative for TC, leading to underprediction of TC intensity. This study provides the first attempt to implement the physically based 2D dynamic Smagorinsky model (DSM) for horizontal turbulence parameterization in WRF model for TC forecasts. The DSM dynamically computes the Smagorinsky coefficient as a function of the resolved flow during the simulation, avoiding the need to prescribe the coefficient a prior. The test results of the DSM in a TC NWP model show that the DSM can significantly improve the wind intensity forecasts compared to the standard Smagorinsky model. |
| format | Article |
| id | doaj-art-cdb7f5f5c9de4b9da935f19ee54824f1 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-cdb7f5f5c9de4b9da935f19ee54824f12025-08-20T03:12:51ZengWileyGeophysical Research Letters0094-82761944-80072024-10-015119n/an/a10.1029/2024GL110392A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone SimulationXu Zhang0Qijun Huang1Yulong Ma2Shanghai Typhoon Institute China Meteorological Administration Shanghai ChinaShanghai Typhoon Institute China Meteorological Administration Shanghai ChinaGuangdong‐Hong kong‐Macau Greater Bay Area Weather Research Center for Monitoring Warning and Forecasting Shenzhen Institute of Meteorological Innovation Shenzhen ChinaAbstract The horizontal turbulence parameterization is vital for the intensity and structure forecasting of tropical cyclone (TC) in numerical weather prediction (NWP) models. The default two‐dimensional (2D) standard Smagorinsky model with a single universal constant in Weather and Research Forecasting (WRF) model has been proven to be over dissipative for TC, leading to underprediction of TC intensity. This study provides the first attempt to implement the physically based 2D dynamic Smagorinsky model (DSM) for horizontal turbulence parameterization in WRF model for TC forecasts. The DSM dynamically computes the Smagorinsky coefficient as a function of the resolved flow during the simulation, avoiding the need to prescribe the coefficient a prior. The test results of the DSM in a TC NWP model show that the DSM can significantly improve the wind intensity forecasts compared to the standard Smagorinsky model.https://doi.org/10.1029/2024GL110392tropical cyclonehorizontal diffusionintensity forecastdynamic Smagorinsky model |
| spellingShingle | Xu Zhang Qijun Huang Yulong Ma A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation Geophysical Research Letters tropical cyclone horizontal diffusion intensity forecast dynamic Smagorinsky model |
| title | A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation |
| title_full | A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation |
| title_fullStr | A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation |
| title_full_unstemmed | A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation |
| title_short | A Dynamic Smagorinsky Model for Horizontal Turbulence Parameterization in Tropical Cyclone Simulation |
| title_sort | dynamic smagorinsky model for horizontal turbulence parameterization in tropical cyclone simulation |
| topic | tropical cyclone horizontal diffusion intensity forecast dynamic Smagorinsky model |
| url | https://doi.org/10.1029/2024GL110392 |
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