Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure
ABSTRACT This study investigates the impact of a scale‐aware convective parameterization scheme (CPS) on the simulation of typhoon track and intensity through a series of experiments using the Global‐to‐Regional Integrated Forecast SysTem (GRIST) model. The results of four typhoon cases show the sca...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Atmospheric Science Letters |
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| Online Access: | https://doi.org/10.1002/asl.1315 |
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| author | Yanjie Liu Xiaocong Wang Yimin Liu Hao Miao Xuesong Zhu Wei Huang Yaxin Zhao Kai Wang |
| author_facet | Yanjie Liu Xiaocong Wang Yimin Liu Hao Miao Xuesong Zhu Wei Huang Yaxin Zhao Kai Wang |
| author_sort | Yanjie Liu |
| collection | DOAJ |
| description | ABSTRACT This study investigates the impact of a scale‐aware convective parameterization scheme (CPS) on the simulation of typhoon track and intensity through a series of experiments using the Global‐to‐Regional Integrated Forecast SysTem (GRIST) model. The results of four typhoon cases show the scale‐aware CPS generally reduces the track error by about 15 km and the intensity error by about 10% compared to the default CPS. By analyzing the budget equation of surface pressure tendency, we found the surface pressure fall due to CPS heating is about 0.6 hPa h−1 weaker when the scale‐aware CPS is used. This is, however, compensated by enhanced microphysics heating, which more than offsets the reduction in CPS and yields a net pressure depression of about 1 hPa h−1. In fact, when parameterized convection is suppressed, the microphysics process takes up the convective instability left over by CPS and stimulates even stronger diabatic heating by 13.8%. The increased microphysics precipitation, along with the intensified grid‐scale ascending, further validates the assertion. The results of this study demonstrate the benefits of scale‐aware CPS on typhoon modeling. |
| format | Article |
| id | doaj-art-a6596799115c4708b8b1762d15766a08 |
| institution | DOAJ |
| issn | 1530-261X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Atmospheric Science Letters |
| spelling | doaj-art-a6596799115c4708b8b1762d15766a082025-08-20T03:09:31ZengWileyAtmospheric Science Letters1530-261X2025-07-01267n/an/a10.1002/asl.1315Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level PressureYanjie Liu0Xiaocong Wang1Yimin Liu2Hao Miao3Xuesong Zhu4Wei Huang5Yaxin Zhao6Kai Wang7State Key Laboratory of Earth System Numerical Modeling and Application, Institute of Atmospheric Physics Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS) Beijing ChinaState Key Laboratory of Earth System Numerical Modeling and Application, Institute of Atmospheric Physics Chinese Academy of Sciences Beijing ChinaChinese Academy of Meteorological Sciences, Nanjing Joint Institute for Atmospheric Sciences Nanjing ChinaShanghai Typhoon Institute, China Meteorological Administration Shanghai ChinaShanghai Typhoon Institute, China Meteorological Administration Shanghai ChinaState Key Laboratory of Earth System Numerical Modeling and Application, Institute of Atmospheric Physics Chinese Academy of Sciences Beijing ChinaCollege of Atmospheric Science Nanjing University of Information Science and Technology Nanjing ChinaABSTRACT This study investigates the impact of a scale‐aware convective parameterization scheme (CPS) on the simulation of typhoon track and intensity through a series of experiments using the Global‐to‐Regional Integrated Forecast SysTem (GRIST) model. The results of four typhoon cases show the scale‐aware CPS generally reduces the track error by about 15 km and the intensity error by about 10% compared to the default CPS. By analyzing the budget equation of surface pressure tendency, we found the surface pressure fall due to CPS heating is about 0.6 hPa h−1 weaker when the scale‐aware CPS is used. This is, however, compensated by enhanced microphysics heating, which more than offsets the reduction in CPS and yields a net pressure depression of about 1 hPa h−1. In fact, when parameterized convection is suppressed, the microphysics process takes up the convective instability left over by CPS and stimulates even stronger diabatic heating by 13.8%. The increased microphysics precipitation, along with the intensified grid‐scale ascending, further validates the assertion. The results of this study demonstrate the benefits of scale‐aware CPS on typhoon modeling.https://doi.org/10.1002/asl.1315Lekimaprecipitationscale‐aware convectionsurface pressure tendencytyphoon |
| spellingShingle | Yanjie Liu Xiaocong Wang Yimin Liu Hao Miao Xuesong Zhu Wei Huang Yaxin Zhao Kai Wang Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure Atmospheric Science Letters Lekima precipitation scale‐aware convection surface pressure tendency typhoon |
| title | Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure |
| title_full | Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure |
| title_fullStr | Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure |
| title_full_unstemmed | Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure |
| title_short | Mechanistic Impacts of a Scale‐Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea‐Level Pressure |
| title_sort | mechanistic impacts of a scale aware convection scheme on typhoon intensity diagnostics from minimum sea level pressure |
| topic | Lekima precipitation scale‐aware convection surface pressure tendency typhoon |
| url | https://doi.org/10.1002/asl.1315 |
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