Influence of the upper gravity-wave damping layer on precipitation over complex terrain
The upper boundary condition of a numerical model can significantly influence the model prediction results. This study used the Weather Research and Forecasting model to introduce the Rayleigh damping layer in the complex terrain of southern Gansu, China. Sensitivity tests are conducted for a strong...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2022.1044969/full |
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| author | H. X. Duan H. X. Duan H. X. Duan T. J. Zhang T. J. Zhang T. J. Zhang C. S. Gong C. S. Gong C. S. Gong G. L. Zhou G. L. Zhou G. L. Zhou WeiWei Zhu |
| author_facet | H. X. Duan H. X. Duan H. X. Duan T. J. Zhang T. J. Zhang T. J. Zhang C. S. Gong C. S. Gong C. S. Gong G. L. Zhou G. L. Zhou G. L. Zhou WeiWei Zhu |
| author_sort | H. X. Duan |
| collection | DOAJ |
| description | The upper boundary condition of a numerical model can significantly influence the model prediction results. This study used the Weather Research and Forecasting model to introduce the Rayleigh damping layer in the complex terrain of southern Gansu, China. Sensitivity tests are conducted for a strong precipitation process that occurred in 2016. Meanwhile, the effects of the upper gravity-wave damping layer and vertical velocity damping term of different schemes are explored. The results show that the upper gravity-wave damping layer can effectively reduce the error caused by false gravity waves in the complex terrain of southern Gansu Province. Moreover, the applicability of this model in the complex terrain of northwestern China is discussed. Overal, prediction of the precipitation area and intensity is improved. Specifically, the introduction of an implicit gravity-wave damping layer has a more significant damping effect on the upwardly propagating gravity-wave. |
| first_indexed | 2024-04-11T08:11:23Z |
| format | Article |
| id | doaj.art-463913f368c544c185ba17170b881ea9 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-11T08:11:23Z |
| publishDate | 2022-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-463913f368c544c185ba17170b881ea92022-12-22T04:35:21ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2022-11-011010.3389/fenvs.2022.10449691044969Influence of the upper gravity-wave damping layer on precipitation over complex terrainH. X. Duan0H. X. Duan1H. X. Duan2T. J. Zhang3T. J. Zhang4T. J. Zhang5C. S. Gong6C. S. Gong7C. S. Gong8G. L. Zhou9G. L. Zhou10G. L. Zhou11WeiWei Zhu12Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, ChinaKey Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, ChinaNorthwestern Regional Center of Numerical Weather Prediction, ChinaInstitute of Arid Meteorology, China Meteorological Administration, Lanzhou, ChinaKey Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, ChinaNorthwestern Regional Center of Numerical Weather Prediction, ChinaInstitute of Arid Meteorology, China Meteorological Administration, Lanzhou, ChinaKey Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, ChinaNorthwestern Regional Center of Numerical Weather Prediction, ChinaInstitute of Arid Meteorology, China Meteorological Administration, Lanzhou, ChinaKey Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, ChinaNorthwestern Regional Center of Numerical Weather Prediction, ChinaChangdu Meteorological Bureau of Tibet, Changdu, ChinaThe upper boundary condition of a numerical model can significantly influence the model prediction results. This study used the Weather Research and Forecasting model to introduce the Rayleigh damping layer in the complex terrain of southern Gansu, China. Sensitivity tests are conducted for a strong precipitation process that occurred in 2016. Meanwhile, the effects of the upper gravity-wave damping layer and vertical velocity damping term of different schemes are explored. The results show that the upper gravity-wave damping layer can effectively reduce the error caused by false gravity waves in the complex terrain of southern Gansu Province. Moreover, the applicability of this model in the complex terrain of northwestern China is discussed. Overal, prediction of the precipitation area and intensity is improved. Specifically, the introduction of an implicit gravity-wave damping layer has a more significant damping effect on the upwardly propagating gravity-wave.https://www.frontiersin.org/articles/10.3389/fenvs.2022.1044969/fullupper gravity-wave absorptioncomplex terrainprecipitationWRF modelenergy flux |
| spellingShingle | H. X. Duan H. X. Duan H. X. Duan T. J. Zhang T. J. Zhang T. J. Zhang C. S. Gong C. S. Gong C. S. Gong G. L. Zhou G. L. Zhou G. L. Zhou WeiWei Zhu Influence of the upper gravity-wave damping layer on precipitation over complex terrain Frontiers in Environmental Science upper gravity-wave absorption complex terrain precipitation WRF model energy flux |
| title | Influence of the upper gravity-wave damping layer on precipitation over complex terrain |
| title_full | Influence of the upper gravity-wave damping layer on precipitation over complex terrain |
| title_fullStr | Influence of the upper gravity-wave damping layer on precipitation over complex terrain |
| title_full_unstemmed | Influence of the upper gravity-wave damping layer on precipitation over complex terrain |
| title_short | Influence of the upper gravity-wave damping layer on precipitation over complex terrain |
| title_sort | influence of the upper gravity wave damping layer on precipitation over complex terrain |
| topic | upper gravity-wave absorption complex terrain precipitation WRF model energy flux |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2022.1044969/full |
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