Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations
Abstract The tropical cyclone (TC) generated orographic precipitation frequently causes severe floods and landslides over coastal and land areas, but its underlying processes remain largely unresolved. This study explored this issue using a high-density rain gauge network and Doppler radar observati...
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| Format: | Article |
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Nature Portfolio
2025-01-01
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| Series: | npj Climate and Atmospheric Science |
| Online Access: | https://doi.org/10.1038/s41612-025-00921-4 |
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| author | Lin-Wen Cheng Cheng-Ku Yu Syuan-Ping Chen |
| author_facet | Lin-Wen Cheng Cheng-Ku Yu Syuan-Ping Chen |
| author_sort | Lin-Wen Cheng |
| collection | DOAJ |
| description | Abstract The tropical cyclone (TC) generated orographic precipitation frequently causes severe floods and landslides over coastal and land areas, but its underlying processes remain largely unresolved. This study explored this issue using a high-density rain gauge network and Doppler radar observations to investigate an intense orographic precipitation event over Da-Tun Mountain (DT) in northern Taiwan associated with Typhoon Meari (2011). Detailed examination of observations and the quantification of precipitation enhancement showed that the seeder–feeder mechanism, rather than the widely known upslope lifting mechanism, was a primary contributor to heavy precipitation. Smaller-scale, landfalling convective elements embedded within TC background precipitation and their interactions with DT also influenced the degree of orographic enhancement of precipitation. These rapidly evolving scenarios represent a secondary contributor to the modulation of precipitation intensities. The results from the study provide important insights into the relative importance of the different processes of orographically enhanced precipitation for TCs. |
| format | Article |
| id | doaj-art-72f8ffa77e7c4512ad2ca11f9f18e045 |
| institution | Kabale University |
| issn | 2397-3722 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Climate and Atmospheric Science |
| spelling | doaj-art-72f8ffa77e7c4512ad2ca11f9f18e0452025-02-02T12:14:40ZengNature Portfolionpj Climate and Atmospheric Science2397-37222025-01-018111410.1038/s41612-025-00921-4Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observationsLin-Wen Cheng0Cheng-Ku Yu1Syuan-Ping Chen2Department of Atmospheric Sciences, National Taiwan UniversityDepartment of Atmospheric Sciences, National Taiwan UniversityDepartment of Atmospheric Sciences, National Taiwan UniversityAbstract The tropical cyclone (TC) generated orographic precipitation frequently causes severe floods and landslides over coastal and land areas, but its underlying processes remain largely unresolved. This study explored this issue using a high-density rain gauge network and Doppler radar observations to investigate an intense orographic precipitation event over Da-Tun Mountain (DT) in northern Taiwan associated with Typhoon Meari (2011). Detailed examination of observations and the quantification of precipitation enhancement showed that the seeder–feeder mechanism, rather than the widely known upslope lifting mechanism, was a primary contributor to heavy precipitation. Smaller-scale, landfalling convective elements embedded within TC background precipitation and their interactions with DT also influenced the degree of orographic enhancement of precipitation. These rapidly evolving scenarios represent a secondary contributor to the modulation of precipitation intensities. The results from the study provide important insights into the relative importance of the different processes of orographically enhanced precipitation for TCs.https://doi.org/10.1038/s41612-025-00921-4 |
| spellingShingle | Lin-Wen Cheng Cheng-Ku Yu Syuan-Ping Chen Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations npj Climate and Atmospheric Science |
| title | Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations |
| title_full | Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations |
| title_fullStr | Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations |
| title_full_unstemmed | Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations |
| title_short | Identifying mechanisms of tropical cyclone generated orographic precipitation with Doppler radar and rain gauge observations |
| title_sort | identifying mechanisms of tropical cyclone generated orographic precipitation with doppler radar and rain gauge observations |
| url | https://doi.org/10.1038/s41612-025-00921-4 |
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