Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006)
Based on Doppler Weather radar observations and numerical simulations applying the Weather Research and Forecasting (WRF) system, this study focused on the rapid intensification (RI) of Typhoon “Mekkhala” (2006) in the inshore area in 2020. The simulated track of the typhoon relatively matched with...
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| Format: | Article |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1230879/full |
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| author | Dehua Chen Dehua Chen Dehua Chen Yongcheng Jiang Yongcheng Jiang Yongcheng Jiang Xin Huang Xin Huang Xin Huang Aiping Xun Aiping Xun Aiping Xun Huaning Dai Huaning Dai Huaning Dai Hanyun Zhang Hanyun Zhang Hanyun Zhang |
| author_facet | Dehua Chen Dehua Chen Dehua Chen Yongcheng Jiang Yongcheng Jiang Yongcheng Jiang Xin Huang Xin Huang Xin Huang Aiping Xun Aiping Xun Aiping Xun Huaning Dai Huaning Dai Huaning Dai Hanyun Zhang Hanyun Zhang Hanyun Zhang |
| author_sort | Dehua Chen |
| collection | DOAJ |
| description | Based on Doppler Weather radar observations and numerical simulations applying the Weather Research and Forecasting (WRF) system, this study focused on the rapid intensification (RI) of Typhoon “Mekkhala” (2006) in the inshore area in 2020. The simulated track of the typhoon relatively matched with the observation, with a slight eastward bias compared to the observed track. During the phase of RI, there was a slight weakening of vertical wind shear between 200–500 hPa. The temporary decrease in vertical wind shear became a favorable factor for the intensification of the typhoon. In general, vertical wind shear of the lower atmosphere is the key to supporting the RI of Typhoon Mekkhala. In the middle troposphere, the southward component of the vertical wind shear suddenly increases, indicates that the inflow of southern wind to the core of the typhoon had strengthened. Thus, the strengthening of the moisture transport by enhanced southern wind, contributed to the intensification of the typhoon. During the intensification of the typhoon, the low-level vorticity was significantly enhanced, and the high vorticity values expanded from the lower to higher troposphere. The vertical distribution of vorticity transformed from symmetry to asymmetry. The development of secondary circulation on both sides of the typhoon is a dynamic factor for intensification. |
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| language | English |
| last_indexed | 2024-03-12T02:10:07Z |
| publishDate | 2023-09-01 |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-67cb20db6f2f404185f90d25a7cb24352023-09-06T14:20:22ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-09-011110.3389/feart.2023.12308791230879Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006)Dehua Chen0Dehua Chen1Dehua Chen2Yongcheng Jiang3Yongcheng Jiang4Yongcheng Jiang5Xin Huang6Xin Huang7Xin Huang8Aiping Xun9Aiping Xun10Aiping Xun11Huaning Dai12Huaning Dai13Huaning Dai14Hanyun Zhang15Hanyun Zhang16Hanyun Zhang17Xiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaXiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaXiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaXiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaXiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaXiamen Key Laboratory of Strait Meteorology, Xiamen, ChinaFujian Key Laboratory of Severe Weather, Fuzhou, ChinaXiamen Meteorological Observatory, Xiamen, ChinaBased on Doppler Weather radar observations and numerical simulations applying the Weather Research and Forecasting (WRF) system, this study focused on the rapid intensification (RI) of Typhoon “Mekkhala” (2006) in the inshore area in 2020. The simulated track of the typhoon relatively matched with the observation, with a slight eastward bias compared to the observed track. During the phase of RI, there was a slight weakening of vertical wind shear between 200–500 hPa. The temporary decrease in vertical wind shear became a favorable factor for the intensification of the typhoon. In general, vertical wind shear of the lower atmosphere is the key to supporting the RI of Typhoon Mekkhala. In the middle troposphere, the southward component of the vertical wind shear suddenly increases, indicates that the inflow of southern wind to the core of the typhoon had strengthened. Thus, the strengthening of the moisture transport by enhanced southern wind, contributed to the intensification of the typhoon. During the intensification of the typhoon, the low-level vorticity was significantly enhanced, and the high vorticity values expanded from the lower to higher troposphere. The vertical distribution of vorticity transformed from symmetry to asymmetry. The development of secondary circulation on both sides of the typhoon is a dynamic factor for intensification.https://www.frontiersin.org/articles/10.3389/feart.2023.1230879/fullTyphoon “Mekkhala”rapid intensificationnumerical simulationdoppler weather radarWest coast of Taiwan Strait |
| spellingShingle | Dehua Chen Dehua Chen Dehua Chen Yongcheng Jiang Yongcheng Jiang Yongcheng Jiang Xin Huang Xin Huang Xin Huang Aiping Xun Aiping Xun Aiping Xun Huaning Dai Huaning Dai Huaning Dai Hanyun Zhang Hanyun Zhang Hanyun Zhang Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) Frontiers in Earth Science Typhoon “Mekkhala” rapid intensification numerical simulation doppler weather radar West coast of Taiwan Strait |
| title | Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) |
| title_full | Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) |
| title_fullStr | Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) |
| title_full_unstemmed | Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) |
| title_short | Observation and simulation study on the rapid intensification mechanism of Typhoon “Mekkhala” (2006) |
| title_sort | observation and simulation study on the rapid intensification mechanism of typhoon mekkhala 2006 |
| topic | Typhoon “Mekkhala” rapid intensification numerical simulation doppler weather radar West coast of Taiwan Strait |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1230879/full |
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