Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan
Heavy rainfall events in western Japan during early July have become more frequent, yet the underlying mechanism behind this trend during the late stage of the Meiyu-Baiu rainy season remains unclear. Our long-term analysis of short-duration events revealed that a quasi-stationary Rossby wave train...
| 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 Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ad02ac |
| _version_ | 1797654544555966464 |
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| author | Shinji Matsumura Satoshi Iizuka |
| author_facet | Shinji Matsumura Satoshi Iizuka |
| author_sort | Shinji Matsumura |
| collection | DOAJ |
| description | Heavy rainfall events in western Japan during early July have become more frequent, yet the underlying mechanism behind this trend during the late stage of the Meiyu-Baiu rainy season remains unclear. Our long-term analysis of short-duration events revealed that a quasi-stationary Rossby wave train enhances the poleward transport of moisture from the western Pacific, contributing to the frequent occurrence of heavy rainfall events over western Japan. The local-scale circulation over the East China Sea plays a substantial role in producing this quasi-stationary Rossby wave train, which is closely linked to enhanced deep convection over the Kuroshio warm current, characterized by a distinct sea surface temperature (SST) front. The coarse resolution of both the model and SST data may hinder the ability of climate simulations to capture the local-scale circulation, underscoring the importance of quasi-stationary atmospheric circulation for a better understanding of heavy rainfall events through poleward moisture transport. |
| first_indexed | 2024-03-11T17:01:02Z |
| format | Article |
| id | doaj.art-291daccf467147a7900a402c6dde652c |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-11T17:01:02Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-291daccf467147a7900a402c6dde652c2023-10-20T08:01:52ZengIOP PublishingEnvironmental Research Letters1748-93262023-01-01181111403810.1088/1748-9326/ad02acLocal-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western JapanShinji Matsumura0https://orcid.org/0000-0001-6824-2573Satoshi Iizuka1National Research Institute for Earth Science and Disaster Resilience , Tsukuba, JapanNational Research Institute for Earth Science and Disaster Resilience , Tsukuba, JapanHeavy rainfall events in western Japan during early July have become more frequent, yet the underlying mechanism behind this trend during the late stage of the Meiyu-Baiu rainy season remains unclear. Our long-term analysis of short-duration events revealed that a quasi-stationary Rossby wave train enhances the poleward transport of moisture from the western Pacific, contributing to the frequent occurrence of heavy rainfall events over western Japan. The local-scale circulation over the East China Sea plays a substantial role in producing this quasi-stationary Rossby wave train, which is closely linked to enhanced deep convection over the Kuroshio warm current, characterized by a distinct sea surface temperature (SST) front. The coarse resolution of both the model and SST data may hinder the ability of climate simulations to capture the local-scale circulation, underscoring the importance of quasi-stationary atmospheric circulation for a better understanding of heavy rainfall events through poleward moisture transport.https://doi.org/10.1088/1748-9326/ad02acatmospheric riversheavy rainfallRossby wavesKuroshio front |
| spellingShingle | Shinji Matsumura Satoshi Iizuka Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan Environmental Research Letters atmospheric rivers heavy rainfall Rossby waves Kuroshio front |
| title | Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan |
| title_full | Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan |
| title_fullStr | Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan |
| title_full_unstemmed | Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan |
| title_short | Local-scale circulation associated with enhanced poleward moisture transport for Meiyu-Baiu heavy rainfall over western Japan |
| title_sort | local scale circulation associated with enhanced poleward moisture transport for meiyu baiu heavy rainfall over western japan |
| topic | atmospheric rivers heavy rainfall Rossby waves Kuroshio front |
| url | https://doi.org/10.1088/1748-9326/ad02ac |
| work_keys_str_mv | AT shinjimatsumura localscalecirculationassociatedwithenhancedpolewardmoisturetransportformeiyubaiuheavyrainfalloverwesternjapan AT satoshiiizuka localscalecirculationassociatedwithenhancedpolewardmoisturetransportformeiyubaiuheavyrainfalloverwesternjapan |