Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes
Abstract Although the cold wake of tropical cyclones (TCs) is recognized to be typically rightward biased relative to TC track (in the North Hemisphere), it remains unclear to what extent the rightward bias should be for specified TCs. Based on numerical simulations and observational statistics, thi...
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| Format: | Article |
| Language: | English |
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Wiley
2023-09-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL104578 |
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| author | Zhanhong Ma Xinyue Yan Jianfang Fei |
| author_facet | Zhanhong Ma Xinyue Yan Jianfang Fei |
| author_sort | Zhanhong Ma |
| collection | DOAJ |
| description | Abstract Although the cold wake of tropical cyclones (TCs) is recognized to be typically rightward biased relative to TC track (in the North Hemisphere), it remains unclear to what extent the rightward bias should be for specified TCs. Based on numerical simulations and observational statistics, this study shows that the distance of cold wake rightward bias is closely related to latitude, translation speed and radius of maximum wind (RMW) of a TC, but is independent from maximum surface wind and radial wind profile outside the RMW, namely TC intensity and size. A semi‐empirical equation is derived to represent the rightward bias extent of cold wakes. For TCs with slower translation speed, smaller RMW, or at higher latitudes, the cold wakes are less asymmetric relative to the TC track. Atmospheric simulations also show that the TC tends to be weaker and more asymmetric as the cold wake is closer to TC center. |
| format | Article |
| id | doaj-art-1312e0b01c154feebce90f05c0a0988e |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-1312e0b01c154feebce90f05c0a0988e2025-08-20T03:02:10ZengWileyGeophysical Research Letters0094-82761944-80072023-09-015017n/an/a10.1029/2023GL104578Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold WakesZhanhong Ma0Xinyue Yan1Jianfang Fei2College of Meteorology and Oceanography National University of Defense Technology Changsha ChinaCollege of Meteorology and Oceanography National University of Defense Technology Changsha ChinaCollege of Meteorology and Oceanography National University of Defense Technology Changsha ChinaAbstract Although the cold wake of tropical cyclones (TCs) is recognized to be typically rightward biased relative to TC track (in the North Hemisphere), it remains unclear to what extent the rightward bias should be for specified TCs. Based on numerical simulations and observational statistics, this study shows that the distance of cold wake rightward bias is closely related to latitude, translation speed and radius of maximum wind (RMW) of a TC, but is independent from maximum surface wind and radial wind profile outside the RMW, namely TC intensity and size. A semi‐empirical equation is derived to represent the rightward bias extent of cold wakes. For TCs with slower translation speed, smaller RMW, or at higher latitudes, the cold wakes are less asymmetric relative to the TC track. Atmospheric simulations also show that the TC tends to be weaker and more asymmetric as the cold wake is closer to TC center.https://doi.org/10.1029/2023GL104578tropical cyclonecold wake |
| spellingShingle | Zhanhong Ma Xinyue Yan Jianfang Fei Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes Geophysical Research Letters tropical cyclone cold wake |
| title | Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes |
| title_full | Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes |
| title_fullStr | Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes |
| title_full_unstemmed | Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes |
| title_short | Quantifying the Rightward Bias Extent of Tropical Cyclones' Cold Wakes |
| title_sort | quantifying the rightward bias extent of tropical cyclones cold wakes |
| topic | tropical cyclone cold wake |
| url | https://doi.org/10.1029/2023GL104578 |
| work_keys_str_mv | AT zhanhongma quantifyingtherightwardbiasextentoftropicalcyclonescoldwakes AT xinyueyan quantifyingtherightwardbiasextentoftropicalcyclonescoldwakes AT jianfangfei quantifyingtherightwardbiasextentoftropicalcyclonescoldwakes |