Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau
The GRAPES_Meso model has some forecast problems, such as larger south wind and more false precipitation in the downstream region of the Tibetan plateau. The proper smoothed-level terrain-following coordinate (SLEVE T-F coordinate for short) could efficiently reduce the pressure gradient force error...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Torrential Rain and Disasters
2020-04-01
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| Series: | 暴雨灾害 |
| Subjects: | |
| Online Access: | http://www.byzh.org.cn/cn/article/doi/10.3969/j.issn.1004-9045.2020.02.002 |
| _version_ | 1797786518075473920 |
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| author | Chao LI Dehui CHEN Xingliang LI Jianglin HU |
| author_facet | Chao LI Dehui CHEN Xingliang LI Jianglin HU |
| author_sort | Chao LI |
| collection | DOAJ |
| description | The GRAPES_Meso model has some forecast problems, such as larger south wind and more false precipitation in the downstream region of the Tibetan plateau. The proper smoothed-level terrain-following coordinate (SLEVE T-F coordinate for short) could efficiently reduce the pressure gradient force error and the mass transport error that are closely related to the wind and water vapor forecasting, therefore, potentially increase prediction performance. Four kinds of T-F coordinates are selected here to simulate a typical quasi-stationary front process. The results of the simulation indicate that under the weak evolution of synoptic background, the improvement of the SLEVE T-F coordinate would be more significant. The SLEVE T-F coordinate can reduce the bias of the wind, false precipitation, false synoptic systems and so on, which results in small calculating error and the better performance of the simulation. |
| first_indexed | 2024-03-13T01:10:03Z |
| format | Article |
| id | doaj.art-b5be07886a7a46e1a5647c3e70aaeeac |
| institution | Directory Open Access Journal |
| issn | 2097-2164 |
| language | zho |
| last_indexed | 2024-03-13T01:10:03Z |
| publishDate | 2020-04-01 |
| publisher | Editorial Office of Torrential Rain and Disasters |
| record_format | Article |
| series | 暴雨灾害 |
| spelling | doaj.art-b5be07886a7a46e1a5647c3e70aaeeac2023-07-06T04:41:40ZzhoEditorial Office of Torrential Rain and Disasters暴雨灾害2097-21642020-04-0139211712410.3969/j.issn.1004-9045.2020.02.0022642Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan PlateauChao LI0Dehui CHEN1Xingliang LI2Jianglin HU3National Meteorological Center Beijing 100081National Meteorological Center Beijing 100081National Meteorological Center Beijing 100081National Meteorological Center Beijing 100081The GRAPES_Meso model has some forecast problems, such as larger south wind and more false precipitation in the downstream region of the Tibetan plateau. The proper smoothed-level terrain-following coordinate (SLEVE T-F coordinate for short) could efficiently reduce the pressure gradient force error and the mass transport error that are closely related to the wind and water vapor forecasting, therefore, potentially increase prediction performance. Four kinds of T-F coordinates are selected here to simulate a typical quasi-stationary front process. The results of the simulation indicate that under the weak evolution of synoptic background, the improvement of the SLEVE T-F coordinate would be more significant. The SLEVE T-F coordinate can reduce the bias of the wind, false precipitation, false synoptic systems and so on, which results in small calculating error and the better performance of the simulation.http://www.byzh.org.cn/cn/article/doi/10.3969/j.issn.1004-9045.2020.02.002grapes modelterrain-following coordinatequasi-stationary frontdynamic corenumerical modelling |
| spellingShingle | Chao LI Dehui CHEN Xingliang LI Jianglin HU Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau 暴雨灾害 grapes model terrain-following coordinate quasi-stationary front dynamic core numerical modelling |
| title | Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau |
| title_full | Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau |
| title_fullStr | Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau |
| title_full_unstemmed | Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau |
| title_short | Impact of height-based terrain-following coordinates on a case of quasi-stationary front simulations around the Tibetan Plateau |
| title_sort | impact of height based terrain following coordinates on a case of quasi stationary front simulations around the tibetan plateau |
| topic | grapes model terrain-following coordinate quasi-stationary front dynamic core numerical modelling |
| url | http://www.byzh.org.cn/cn/article/doi/10.3969/j.issn.1004-9045.2020.02.002 |
| work_keys_str_mv | AT chaoli impactofheightbasedterrainfollowingcoordinatesonacaseofquasistationaryfrontsimulationsaroundthetibetanplateau AT dehuichen impactofheightbasedterrainfollowingcoordinatesonacaseofquasistationaryfrontsimulationsaroundthetibetanplateau AT xingliangli impactofheightbasedterrainfollowingcoordinatesonacaseofquasistationaryfrontsimulationsaroundthetibetanplateau AT jianglinhu impactofheightbasedterrainfollowingcoordinatesonacaseofquasistationaryfrontsimulationsaroundthetibetanplateau |