The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010)
Sensitivity tests based on a spectral nudging (SN) technique are conducted to analyze the effect of large-scale environmental factors on the movement of typhoon Megi (2010). The error of simulated typhoon track is effectively reduced using SN and the impact of dynamical factors is more significant t...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2017-12-01
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| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/8/12/257 |
| _version_ | 1818534361559990272 |
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| author | Xingliang Guo Wei Zhong |
| author_facet | Xingliang Guo Wei Zhong |
| author_sort | Xingliang Guo |
| collection | DOAJ |
| description | Sensitivity tests based on a spectral nudging (SN) technique are conducted to analyze the effect of large-scale environmental factors on the movement of typhoon Megi (2010). The error of simulated typhoon track is effectively reduced using SN and the impact of dynamical factors is more significant than that of thermal factors. During the initial integration and deflection period of Megi (2010), the local steering flow of the whole and lower troposphere is corrected by a direct large-scale wind adjustment, which improves track simulation. However, environmental field nudging may weaken the impacts of terrain and typhoon system development in the landfall period, resulting in large simulated track errors. Comparison of the steering flow and inner structure of the typhoon reveals that the large-scale circulation influences the speed and direction of typhoon motion by: (1) adjusting the local steering flow and (2) modifying the environmental vertical wind shear to change the location and symmetry of the inner severe convection. |
| first_indexed | 2024-12-11T18:10:39Z |
| format | Article |
| id | doaj.art-8575092c5dac4dd3a40f63da08db09eb |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-12-11T18:10:39Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-8575092c5dac4dd3a40f63da08db09eb2022-12-22T00:55:34ZengMDPI AGAtmosphere2073-44332017-12-0181225710.3390/atmos8120257atmos8120257The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010)Xingliang Guo0Wei Zhong1Institute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaInstitute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaSensitivity tests based on a spectral nudging (SN) technique are conducted to analyze the effect of large-scale environmental factors on the movement of typhoon Megi (2010). The error of simulated typhoon track is effectively reduced using SN and the impact of dynamical factors is more significant than that of thermal factors. During the initial integration and deflection period of Megi (2010), the local steering flow of the whole and lower troposphere is corrected by a direct large-scale wind adjustment, which improves track simulation. However, environmental field nudging may weaken the impacts of terrain and typhoon system development in the landfall period, resulting in large simulated track errors. Comparison of the steering flow and inner structure of the typhoon reveals that the large-scale circulation influences the speed and direction of typhoon motion by: (1) adjusting the local steering flow and (2) modifying the environmental vertical wind shear to change the location and symmetry of the inner severe convection.https://www.mdpi.com/2073-4433/8/12/257spectral nudgingtyphoon trackenvironmental factors |
| spellingShingle | Xingliang Guo Wei Zhong The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) Atmosphere spectral nudging typhoon track environmental factors |
| title | The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) |
| title_full | The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) |
| title_fullStr | The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) |
| title_full_unstemmed | The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) |
| title_short | The Use of a Spectral Nudging Technique to Determine the Impact of Environmental Factors on the Track of Typhoon Megi (2010) |
| title_sort | use of a spectral nudging technique to determine the impact of environmental factors on the track of typhoon megi 2010 |
| topic | spectral nudging typhoon track environmental factors |
| url | https://www.mdpi.com/2073-4433/8/12/257 |
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