Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific
Abstract This study reveals that the atmosphere‐ocean coupled intraseasonal oscillation (ISO) enhances the occurrence frequency of Category 5 (C5) typhoons in the western North Pacific (WNP). Climatologically, the major region of C5 typhoon occurrence in the WNP is collocated with the intraseasonal...
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| Format: | Article |
| Language: | English |
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Wiley
2017-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL072743 |
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| author | Chun‐Hsiung Weng Huang‐Hsiung Hsu |
| author_facet | Chun‐Hsiung Weng Huang‐Hsiung Hsu |
| author_sort | Chun‐Hsiung Weng |
| collection | DOAJ |
| description | Abstract This study reveals that the atmosphere‐ocean coupled intraseasonal oscillation (ISO) enhances the occurrence frequency of Category 5 (C5) typhoons in the western North Pacific (WNP). Climatologically, the major region of C5 typhoon occurrence in the WNP is collocated with the intraseasonal variance of outgoing longwave radiation and tropical cyclone heat potential. The active convection and large ocean heat content associated with ISO create an environment conducive to the occurrence of C5 typhoons. Between 1980 and 2009, approximately 82% of C5 typhoons occurred when one or both of the two conditions were fulfilled. Our results suggest that compared with the thermodynamic factor of ocean heat content, dynamic factors (i.e., convection and near‐surface moisture convergence) within the favorable intraseasonal background state likely play a more influential role in inducing C5 typhoons. |
| format | Article |
| id | doaj-art-41d571c5aac544a6baefdc05f0eee6c2 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2017-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-41d571c5aac544a6baefdc05f0eee6c22025-08-20T02:31:41ZengWileyGeophysical Research Letters0094-82761944-80072017-04-014473339334510.1002/2017GL072743Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North PacificChun‐Hsiung Weng0Huang‐Hsiung Hsu1Research Center for Environmental Changes Academia Sinica Taipei TaiwanResearch Center for Environmental Changes Academia Sinica Taipei TaiwanAbstract This study reveals that the atmosphere‐ocean coupled intraseasonal oscillation (ISO) enhances the occurrence frequency of Category 5 (C5) typhoons in the western North Pacific (WNP). Climatologically, the major region of C5 typhoon occurrence in the WNP is collocated with the intraseasonal variance of outgoing longwave radiation and tropical cyclone heat potential. The active convection and large ocean heat content associated with ISO create an environment conducive to the occurrence of C5 typhoons. Between 1980 and 2009, approximately 82% of C5 typhoons occurred when one or both of the two conditions were fulfilled. Our results suggest that compared with the thermodynamic factor of ocean heat content, dynamic factors (i.e., convection and near‐surface moisture convergence) within the favorable intraseasonal background state likely play a more influential role in inducing C5 typhoons.https://doi.org/10.1002/2017GL072743intraseasonal oscillationatmosphere‐ocean interactionC5 typhoonwestern North Pacificintraseasonal oscillationatmosphere‐ocean interaction |
| spellingShingle | Chun‐Hsiung Weng Huang‐Hsiung Hsu Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific Geophysical Research Letters intraseasonal oscillation atmosphere‐ocean interaction C5 typhoon western North Pacific intraseasonal oscillation atmosphere‐ocean interaction |
| title | Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific |
| title_full | Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific |
| title_fullStr | Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific |
| title_full_unstemmed | Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific |
| title_short | Intraseasonal oscillation enhancing C5 typhoon occurrence over the tropical western North Pacific |
| title_sort | intraseasonal oscillation enhancing c5 typhoon occurrence over the tropical western north pacific |
| topic | intraseasonal oscillation atmosphere‐ocean interaction C5 typhoon western North Pacific intraseasonal oscillation atmosphere‐ocean interaction |
| url | https://doi.org/10.1002/2017GL072743 |
| work_keys_str_mv | AT chunhsiungweng intraseasonaloscillationenhancingc5typhoonoccurrenceoverthetropicalwesternnorthpacific AT huanghsiunghsu intraseasonaloscillationenhancingc5typhoonoccurrenceoverthetropicalwesternnorthpacific |