Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones
In this paper, the authors present the statistical characteristics of the buoyancy of outer-core convective-scale updrafts in numerically simulated sheared tropical cyclones (TCs). The total buoyancy is predominantly positive in weak-to-strong ambient vertical shears, whereas much of the total buoya...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2019-01-01
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| Series: | Atmospheric and Oceanic Science Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/16742834.2019.1548883 |
| _version_ | 1818434159222194176 |
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| author | Qingqing LI Qiaoxian FANG |
| author_facet | Qingqing LI Qiaoxian FANG |
| author_sort | Qingqing LI |
| collection | DOAJ |
| description | In this paper, the authors present the statistical characteristics of the buoyancy of outer-core convective-scale updrafts in numerically simulated sheared tropical cyclones (TCs). The total buoyancy is predominantly positive in weak-to-strong ambient vertical shears, whereas much of the total buoyancy under an extreme shear environment becomes negative. Thermal buoyancy positively contributes to the total buoyancy value. For weakly and moderately sheared TCs, the updraft buoyancy is statistically significantly stronger downshear but smaller upshear. Such a downshear preference of strong buoyancy becomes less evident as the shear magnitude increases. The total buoyancy of updrafts shows a decreasing tendency with radius. Both thermal and dynamic buoyancy do not significantly correlate with vertically averaged vertical mass fluxes. This also leads to no significant correlation between the total buoyancy and vertical mass fluxes of outer-core updrafts. |
| first_indexed | 2024-12-14T16:32:33Z |
| format | Article |
| id | doaj.art-94f07888388f4347be4f37b38881aa8e |
| institution | Directory Open Access Journal |
| issn | 1674-2834 2376-6123 |
| language | English |
| last_indexed | 2024-12-14T16:32:33Z |
| publishDate | 2019-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Atmospheric and Oceanic Science Letters |
| spelling | doaj.art-94f07888388f4347be4f37b38881aa8e2022-12-21T22:54:32ZengKeAi Communications Co., Ltd.Atmospheric and Oceanic Science Letters1674-28342376-61232019-01-01121586510.1080/16742834.2019.15488831548883Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclonesQingqing LI0Qiaoxian FANG1Nanjing University of Information Science and TechnologyNanjing University of Information Science and TechnologyIn this paper, the authors present the statistical characteristics of the buoyancy of outer-core convective-scale updrafts in numerically simulated sheared tropical cyclones (TCs). The total buoyancy is predominantly positive in weak-to-strong ambient vertical shears, whereas much of the total buoyancy under an extreme shear environment becomes negative. Thermal buoyancy positively contributes to the total buoyancy value. For weakly and moderately sheared TCs, the updraft buoyancy is statistically significantly stronger downshear but smaller upshear. Such a downshear preference of strong buoyancy becomes less evident as the shear magnitude increases. The total buoyancy of updrafts shows a decreasing tendency with radius. Both thermal and dynamic buoyancy do not significantly correlate with vertically averaged vertical mass fluxes. This also leads to no significant correlation between the total buoyancy and vertical mass fluxes of outer-core updrafts.http://dx.doi.org/10.1080/16742834.2019.1548883Tropical cyclonevertical wind shearouter coreupdraftbuoyancy |
| spellingShingle | Qingqing LI Qiaoxian FANG Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones Atmospheric and Oceanic Science Letters Tropical cyclone vertical wind shear outer core updraft buoyancy |
| title | Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones |
| title_full | Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones |
| title_fullStr | Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones |
| title_full_unstemmed | Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones |
| title_short | Buoyancy of convective-scale updrafts in the outer cores of sheared tropical cyclones |
| title_sort | buoyancy of convective scale updrafts in the outer cores of sheared tropical cyclones |
| topic | Tropical cyclone vertical wind shear outer core updraft buoyancy |
| url | http://dx.doi.org/10.1080/16742834.2019.1548883 |
| work_keys_str_mv | AT qingqingli buoyancyofconvectivescaleupdraftsintheoutercoresofshearedtropicalcyclones AT qiaoxianfang buoyancyofconvectivescaleupdraftsintheoutercoresofshearedtropicalcyclones |