Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific
Abstract This study investigates the asymmetric response of accumulated cyclone energy (ACE) of western North Pacific (WNP) tropical cyclones during autumn (September–November) to El Niño‐Southern Oscillation (ENSO) from 1970 to 2023. Although basinwide ACE is positively correlated with ENSO, it sig...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL116661 |
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| author | Jinjie Song Philip J. Klotzbach Na Wei Yihong Duan |
| author_facet | Jinjie Song Philip J. Klotzbach Na Wei Yihong Duan |
| author_sort | Jinjie Song |
| collection | DOAJ |
| description | Abstract This study investigates the asymmetric response of accumulated cyclone energy (ACE) of western North Pacific (WNP) tropical cyclones during autumn (September–November) to El Niño‐Southern Oscillation (ENSO) from 1970 to 2023. Although basinwide ACE is positively correlated with ENSO, it significantly decreases in La Niña but only slightly changes in El Niño. This is mainly due to a significant reduction (weak change) in basinwide TC genesis but also a southeastward (northwestward) shift in El Niño (La Niña). This leads to longer‐tracked (shorter‐tracked) storms in El Niño (La Niña). Furthermore, in El Niño years, ENSO‐related signals migrate farther eastward, leading to the regions suppressing TC genesis being much larger than those favoring TC genesis. By comparison, in La Niña years, ENSO‐related signals extend more westward, while the TC‐favoring regions are of a similar size to the TC‐suppressing regions. Finally, El Niño is primarily responsible for the asymmetric autumn ENSO‐ACE relationship. |
| format | Article |
| id | doaj-art-d4d893d9c0884e51a86e43f8a0988c31 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d4d893d9c0884e51a86e43f8a0988c312025-08-20T03:44:24ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015213n/an/a10.1029/2025GL116661Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North PacificJinjie Song0Philip J. Klotzbach1Na Wei2Yihong Duan3Jiangsu Key Laboratory of Severe Storm Disaster Risk Jiangsu Meteorological Bureau Nanjing ChinaDepartment of Atmospheric Science Colorado State University Fort Collins CO USAJiangsu Key Laboratory of Severe Storm Disaster Risk Jiangsu Meteorological Bureau Nanjing ChinaState Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Beijing ChinaAbstract This study investigates the asymmetric response of accumulated cyclone energy (ACE) of western North Pacific (WNP) tropical cyclones during autumn (September–November) to El Niño‐Southern Oscillation (ENSO) from 1970 to 2023. Although basinwide ACE is positively correlated with ENSO, it significantly decreases in La Niña but only slightly changes in El Niño. This is mainly due to a significant reduction (weak change) in basinwide TC genesis but also a southeastward (northwestward) shift in El Niño (La Niña). This leads to longer‐tracked (shorter‐tracked) storms in El Niño (La Niña). Furthermore, in El Niño years, ENSO‐related signals migrate farther eastward, leading to the regions suppressing TC genesis being much larger than those favoring TC genesis. By comparison, in La Niña years, ENSO‐related signals extend more westward, while the TC‐favoring regions are of a similar size to the TC‐suppressing regions. Finally, El Niño is primarily responsible for the asymmetric autumn ENSO‐ACE relationship.https://doi.org/10.1029/2025GL116661tropical cycloneaccumulated cyclone energyEl Niño‐Southern Oscillation |
| spellingShingle | Jinjie Song Philip J. Klotzbach Na Wei Yihong Duan Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific Geophysical Research Letters tropical cyclone accumulated cyclone energy El Niño‐Southern Oscillation |
| title | Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific |
| title_full | Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific |
| title_fullStr | Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific |
| title_full_unstemmed | Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific |
| title_short | Asymmetric Impact of El Niño‐Southern Oscillation on Autumn Accumulated Cyclone Energy Over the Western North Pacific |
| title_sort | asymmetric impact of el nino southern oscillation on autumn accumulated cyclone energy over the western north pacific |
| topic | tropical cyclone accumulated cyclone energy El Niño‐Southern Oscillation |
| url | https://doi.org/10.1029/2025GL116661 |
| work_keys_str_mv | AT jinjiesong asymmetricimpactofelninosouthernoscillationonautumnaccumulatedcycloneenergyoverthewesternnorthpacific AT philipjklotzbach asymmetricimpactofelninosouthernoscillationonautumnaccumulatedcycloneenergyoverthewesternnorthpacific AT nawei asymmetricimpactofelninosouthernoscillationonautumnaccumulatedcycloneenergyoverthewesternnorthpacific AT yihongduan asymmetricimpactofelninosouthernoscillationonautumnaccumulatedcycloneenergyoverthewesternnorthpacific |