The Role of the Pacific-Japan Pattern in Extreme Heatwaves Over Korea and Japan
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Title
- The Role of the Pacific-Japan Pattern in Extreme Heatwaves Over Korea and Japan
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Author(s)
- Noh, El; Kim, Joowan; Jun, Sang-Yoon; Cha, Dong-Hyun; Park, Myung Sook; Kim, Joo-Hong; Kim, Hyeong-Gyu
- KIOST Author(s)
- Park, Myung Sook(박명숙)
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Alternative Author(s)
- 박명숙
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Publication Year
- 2021-09-28
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Abstract
- In the Northwestern Pacific, the meridionally propagating Rossby waves, known as the Pacific-Japan (PJ) pattern, is the dominant teleconnection pattern and is considered as a source of heatwaves in East Asia. In this study, the circulation and thermodynamic characteristics of these patterns were investigated based on daily timescale to evaluate their relationship with the likelihood of heatwaves in Korea and Japan. The investigations reveal that stations in Korea and Japan record approximately 90% increase in extremely hot days (Tmax > 35°C) during the positive PJ pattern events. According to thermodynamic budget, horizontal heat advection is a key factor for the observed near-surface warming during the positive PJ. The circulation pattern during the positive PJ largely explains the enhanced warm advection and physical heating due to the increased insolation and adiabatic heating are secondary factors for near-surface warming. This phenomenon is robustly observed regardless of the definition. © 2021. American Geophysical Union. All Rights Reserved.
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ISSN
- 0094-8276
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/42151
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DOI
- 10.1029/2021GL093990
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Bibliographic Citation
- Geophysical Research Letters, v.48, no.18, 2021
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Publisher
- John Wiley and Sons Inc
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Keywords
- heatwaves; horizontal temperature advection; Pacific-Japan pattern
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Type
- Article
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Language
- English
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Document Type
- Article
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