Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones
Abstract Persistent strong winds are a common feature within the near‐surface layer of tropical cyclones, which can induce pronounced horizontal motion as raindrops descend. However, current state‐of‐art microphysics schemes typically only consider the vertical motion of raindrops, ultimately failin...
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL115535 |
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| author | Lin Deng Xuwei Bao Istvan Geresdi Lulin Xue Wei Huang Yang Zhao Wanchen Wu Tiantian Li |
| author_facet | Lin Deng Xuwei Bao Istvan Geresdi Lulin Xue Wei Huang Yang Zhao Wanchen Wu Tiantian Li |
| author_sort | Lin Deng |
| collection | DOAJ |
| description | Abstract Persistent strong winds are a common feature within the near‐surface layer of tropical cyclones, which can induce pronounced horizontal motion as raindrops descend. However, current state‐of‐art microphysics schemes typically only consider the vertical motion of raindrops, ultimately failing to accurately simulate the collisional outcomes of raindrops and the associated raindrop size distributions (RSDs) under strong winds. For instance, the original bin microphysics scheme was unable to successfully reproduced the evolution of RSDs with decreasing height, as measured from the multi‐layer observations during the landfall of Typhoon Pakhar (2017). Thus, this study introduces a modified bin microphysics scheme that incorporates the influence of horizontal wind speeds, vertical wind shear and smaller‐scale turbulence on the total movement velocity (including horizontal and vertical components) of raindrops, and consequently on their collisional outcomes. This modification demonstrates a remarkable improvement in the representation of the intrinsic variation in RSDs with decreasing height under strong‐wind conditions. |
| format | Article |
| id | doaj-art-6820a89e37c54e1db430c66f93cbae06 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-6820a89e37c54e1db430c66f93cbae062025-08-20T03:59:22ZengWileyGeophysical Research Letters0094-82761944-80072025-04-01528n/an/a10.1029/2025GL115535Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical CyclonesLin Deng0Xuwei Bao1Istvan Geresdi2Lulin Xue3Wei Huang4Yang Zhao5Wanchen Wu6Tiantian Li7Shanghai Typhoon Institute, and Key Laboratory of Numerical Modeling for Tropical Cyclone of the China Meteorological Administration Shanghai ChinaShanghai Typhoon Institute, and Key Laboratory of Numerical Modeling for Tropical Cyclone of the China Meteorological Administration Shanghai ChinaFaculty of Sciences University of Pecs Pécs HungaryNational Center for Atmospheric Research Boulder CO USAShanghai Typhoon Institute, and Key Laboratory of Numerical Modeling for Tropical Cyclone of the China Meteorological Administration Shanghai ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System‐Key Laboratory of Physical Oceanography, and College of Oceanic and Atmospheric Sciences Ocean University of China Qingdao ChinaShanghai Typhoon Institute, and Key Laboratory of Numerical Modeling for Tropical Cyclone of the China Meteorological Administration Shanghai ChinaShanghai Typhoon Institute, and Key Laboratory of Numerical Modeling for Tropical Cyclone of the China Meteorological Administration Shanghai ChinaAbstract Persistent strong winds are a common feature within the near‐surface layer of tropical cyclones, which can induce pronounced horizontal motion as raindrops descend. However, current state‐of‐art microphysics schemes typically only consider the vertical motion of raindrops, ultimately failing to accurately simulate the collisional outcomes of raindrops and the associated raindrop size distributions (RSDs) under strong winds. For instance, the original bin microphysics scheme was unable to successfully reproduced the evolution of RSDs with decreasing height, as measured from the multi‐layer observations during the landfall of Typhoon Pakhar (2017). Thus, this study introduces a modified bin microphysics scheme that incorporates the influence of horizontal wind speeds, vertical wind shear and smaller‐scale turbulence on the total movement velocity (including horizontal and vertical components) of raindrops, and consequently on their collisional outcomes. This modification demonstrates a remarkable improvement in the representation of the intrinsic variation in RSDs with decreasing height under strong‐wind conditions.https://doi.org/10.1029/2025GL115535collisional breakupstrong horizontal windstropical cycloneshigh‐tower observationmicrophysics scheme |
| spellingShingle | Lin Deng Xuwei Bao Istvan Geresdi Lulin Xue Wei Huang Yang Zhao Wanchen Wu Tiantian Li Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones Geophysical Research Letters collisional breakup strong horizontal winds tropical cyclones high‐tower observation microphysics scheme |
| title | Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones |
| title_full | Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones |
| title_fullStr | Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones |
| title_full_unstemmed | Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones |
| title_short | Previously Neglected Effects of Strong Horizontal Winds on Raindrop Collisions in Tropical Cyclones |
| title_sort | previously neglected effects of strong horizontal winds on raindrop collisions in tropical cyclones |
| topic | collisional breakup strong horizontal winds tropical cyclones high‐tower observation microphysics scheme |
| url | https://doi.org/10.1029/2025GL115535 |
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