Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation
This study investigates the modulation of western North Pacific (WNP) tropical cyclone rapid intensification (RI) by the North Pacific Gyre Oscillation (NPGO) on decadal timescales. There is a significant inverse relationship between basinwide RI numbers during July–November and the simultaneous NPG...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Environmental Research Communications |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2515-7620/ace762 |
| _version_ | 1797770496750649344 |
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| author | Jinjie Song Philip J Klotzbach Yifei Dai Yihong Duan |
| author_facet | Jinjie Song Philip J Klotzbach Yifei Dai Yihong Duan |
| author_sort | Jinjie Song |
| collection | DOAJ |
| description | This study investigates the modulation of western North Pacific (WNP) tropical cyclone rapid intensification (RI) by the North Pacific Gyre Oscillation (NPGO) on decadal timescales. There is a significant inverse relationship between basinwide RI numbers during July–November and the simultaneous NPGO index from 1970 to 2021. During the positive NPGO phase, suppressed RI occurs over almost the entire WNP, with a distinctly different spatial distribution compared to the Pacific Decadal Oscillation-driven pattern of RI modulation. RI occurrence is significantly reduced over the eastern Philippine Sea (10°–25°N, 140°–155°E). This is primarily caused by enhanced negative low-level vorticity, which can be linked to the horizontal extent of the anomalous low-level anticyclone. By comparison, over the western Philippine Sea (10°–25°N, 125°–140°E), there are only weak RI occurrence changes due to offsetting influences of increased mid-level humidity and decreased low-level vorticity. |
| first_indexed | 2024-03-12T21:24:06Z |
| format | Article |
| id | doaj.art-d1672b5abd344ae3833cca7ff8e22bc9 |
| institution | Directory Open Access Journal |
| issn | 2515-7620 |
| language | English |
| last_indexed | 2024-03-12T21:24:06Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Communications |
| spelling | doaj.art-d1672b5abd344ae3833cca7ff8e22bc92023-07-28T11:53:29ZengIOP PublishingEnvironmental Research Communications2515-76202023-01-015707100510.1088/2515-7620/ace762Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre OscillationJinjie Song0https://orcid.org/0000-0003-3948-8894Philip J Klotzbach1Yifei Dai2Yihong Duan3Nanjing Joint Institute for Atmospheric Sciences, Chinese Academy of Meteorological Sciences, Nanjing, People’s Republic of China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, People’s Republic of ChinaDepartment of Atmospheric Science, Colorado State University , Fort Collins, CO, United States of AmericaNanjing Joint Institute for Atmospheric Sciences, Chinese Academy of Meteorological Sciences, Nanjing, People’s Republic of China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, People’s Republic of ChinaState Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, People’s Republic of ChinaThis study investigates the modulation of western North Pacific (WNP) tropical cyclone rapid intensification (RI) by the North Pacific Gyre Oscillation (NPGO) on decadal timescales. There is a significant inverse relationship between basinwide RI numbers during July–November and the simultaneous NPGO index from 1970 to 2021. During the positive NPGO phase, suppressed RI occurs over almost the entire WNP, with a distinctly different spatial distribution compared to the Pacific Decadal Oscillation-driven pattern of RI modulation. RI occurrence is significantly reduced over the eastern Philippine Sea (10°–25°N, 140°–155°E). This is primarily caused by enhanced negative low-level vorticity, which can be linked to the horizontal extent of the anomalous low-level anticyclone. By comparison, over the western Philippine Sea (10°–25°N, 125°–140°E), there are only weak RI occurrence changes due to offsetting influences of increased mid-level humidity and decreased low-level vorticity.https://doi.org/10.1088/2515-7620/ace762tropical cyclonerapid intensificationNorth Pacific Gyre Oscillation |
| spellingShingle | Jinjie Song Philip J Klotzbach Yifei Dai Yihong Duan Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation Environmental Research Communications tropical cyclone rapid intensification North Pacific Gyre Oscillation |
| title | Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation |
| title_full | Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation |
| title_fullStr | Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation |
| title_full_unstemmed | Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation |
| title_short | Decadal changes in rapid intensification of western North Pacific tropical cyclones modulated by the North Pacific Gyre Oscillation |
| title_sort | decadal changes in rapid intensification of western north pacific tropical cyclones modulated by the north pacific gyre oscillation |
| topic | tropical cyclone rapid intensification North Pacific Gyre Oscillation |
| url | https://doi.org/10.1088/2515-7620/ace762 |
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