Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity
Abstract This study investigated the response of the North Pacific storm track (NPST) activity to the meridional shift of the Japan/East Sea subpolar front during the cold season using a statistical method called generalized equilibrium feedback analysis. Results showed that the NPST response exhibi...
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL113622 |
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| author | Peilong Yu Shiyao Chen Huijun Wang Xiaopei Lin Mingkeng Duan Chao Zhang |
| author_facet | Peilong Yu Shiyao Chen Huijun Wang Xiaopei Lin Mingkeng Duan Chao Zhang |
| author_sort | Peilong Yu |
| collection | DOAJ |
| description | Abstract This study investigated the response of the North Pacific storm track (NPST) activity to the meridional shift of the Japan/East Sea subpolar front during the cold season using a statistical method called generalized equilibrium feedback analysis. Results showed that the NPST response exhibits a basin‐wide anomaly in winter but a north‐south dipole in spring. Synoptic eddy temperature variance budget was employed to explore possible mechanisms from the perspective of eddy available potential energy (EAPE) generation. In winter, the baroclinic conversion directly induced by baroclinicity changes drives EAPE generation, and then, the positive eddy feedback reinforces this EAPE generation, giving rise to an intensified NPST. In spring, poleward‐shifted baroclinicity drives a displaced EAPE generation, leading to the poleward displacement of NPST. The shifted baroclinicity is caused by a basin‐scale warm air temperature anomaly, which is coherent with the anticyclone anomaly induced by the divergence of synoptic eddy heat and vorticity fluxes. |
| format | Article |
| id | doaj-art-8419a3298f544a22af8e5c1d0c578c88 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8419a3298f544a22af8e5c1d0c578c882025-01-20T13:05:57ZengWileyGeophysical Research Letters0094-82761944-80072025-01-01521n/an/a10.1029/2024GL113622Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track ActivityPeilong Yu0Shiyao Chen1Huijun Wang2Xiaopei Lin3Mingkeng Duan4Chao Zhang5College of Meteorology and Oceanography National University of Defense Technology Changsha ChinaCollege of Meteorology and Oceanography National University of Defense Technology Changsha ChinaCollaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change Nanjing University of Information Science and Technology Nanjing ChinaPhysical Oceanography Laboratory/Frontiers Science Center for Deep Ocean Multispheres and Earth System/Sanya Oceanographic Institution Ocean University of China Qingdao ChinaCollaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change Nanjing University of Information Science and Technology Nanjing ChinaCollege of Meteorology and Oceanography National University of Defense Technology Changsha ChinaAbstract This study investigated the response of the North Pacific storm track (NPST) activity to the meridional shift of the Japan/East Sea subpolar front during the cold season using a statistical method called generalized equilibrium feedback analysis. Results showed that the NPST response exhibits a basin‐wide anomaly in winter but a north‐south dipole in spring. Synoptic eddy temperature variance budget was employed to explore possible mechanisms from the perspective of eddy available potential energy (EAPE) generation. In winter, the baroclinic conversion directly induced by baroclinicity changes drives EAPE generation, and then, the positive eddy feedback reinforces this EAPE generation, giving rise to an intensified NPST. In spring, poleward‐shifted baroclinicity drives a displaced EAPE generation, leading to the poleward displacement of NPST. The shifted baroclinicity is caused by a basin‐scale warm air temperature anomaly, which is coherent with the anticyclone anomaly induced by the divergence of synoptic eddy heat and vorticity fluxes.https://doi.org/10.1029/2024GL113622North Pacific storm trackJapan/East Seasubpolar fronteddy available potential energybaroclinicity |
| spellingShingle | Peilong Yu Shiyao Chen Huijun Wang Xiaopei Lin Mingkeng Duan Chao Zhang Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity Geophysical Research Letters North Pacific storm track Japan/East Sea subpolar front eddy available potential energy baroclinicity |
| title | Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity |
| title_full | Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity |
| title_fullStr | Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity |
| title_full_unstemmed | Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity |
| title_short | Observed Influences of Subpolar Front in the Japan/East Sea on Winter and Spring North Pacific Storm Track Activity |
| title_sort | observed influences of subpolar front in the japan east sea on winter and spring north pacific storm track activity |
| topic | North Pacific storm track Japan/East Sea subpolar front eddy available potential energy baroclinicity |
| url | https://doi.org/10.1029/2024GL113622 |
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