Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk
Abstract This study examined the relationship between heatwaves in Korea and blocking in the Sea of Okhotsk (OK) region, which significantly influences the Korean climate in summer. According to the analysis, negative correlations were observed between the blocking frequency in the OK region and hea...
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crwiley:10.1002/joc.7659 2024-09-15T18:22:54+00:00 Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk Choi, Jae‐Won Song, Chan‐Yeong Kim, Eung‐Sup Ahn, Joong‐Bae Rural Development Administration 2022 http://dx.doi.org/10.1002/joc.7659 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7659 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7659 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7659 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 42, issue 15, page 7497-7515 ISSN 0899-8418 1097-0088 journal-article 2022 crwiley https://doi.org/10.1002/joc.7659 2024-07-18T04:26:31Z Abstract This study examined the relationship between heatwaves in Korea and blocking in the Sea of Okhotsk (OK) region, which significantly influences the Korean climate in summer. According to the analysis, negative correlations were observed between the blocking frequency in the OK region and heatwave days (HWD) and the surface air temperature (SAT) in Korea over the past four decades (1979–2018). These negative correlations suggest that when the blocking frequency in the OK region increases in summer, the HWD and SAT decrease in Korea. This study selected 10 years of high blocking frequency years (high BF years) and 10 years of low blocking frequency years (low BF years) and analysed the differences between the two groups to explain the negative relationship between the HWD in Korea and the blocking frequency in the OK region. The difference between the two groups revealed strong anomalous anticyclonic and cyclonic circulations that developed in the north Siberia region and northeast Australia (NEA), respectively, throughout all layers in the troposphere. The large anomalous anticyclonic pattern in the North Siberia region was related to the blocking high, while the anomalous cyclonic pattern that developed in NEA was related to the East Asian summer monsoon (EASM) front. The difference in the sea surface temperature (SST) between the two groups was also analysed. In the North Atlantic Ocean, a tripole structure appeared with a cold anomaly in the high latitudes, a warm anomaly in the mid‐latitudes and a cold anomaly again in the low latitudes, which is a typical spatial distribution of the SST anomaly related to the positive North Atlantic Oscillation (NAO) phase. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Siberia Wiley Online Library International Journal of Climatology 42 15 7497 7515 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract This study examined the relationship between heatwaves in Korea and blocking in the Sea of Okhotsk (OK) region, which significantly influences the Korean climate in summer. According to the analysis, negative correlations were observed between the blocking frequency in the OK region and heatwave days (HWD) and the surface air temperature (SAT) in Korea over the past four decades (1979–2018). These negative correlations suggest that when the blocking frequency in the OK region increases in summer, the HWD and SAT decrease in Korea. This study selected 10 years of high blocking frequency years (high BF years) and 10 years of low blocking frequency years (low BF years) and analysed the differences between the two groups to explain the negative relationship between the HWD in Korea and the blocking frequency in the OK region. The difference between the two groups revealed strong anomalous anticyclonic and cyclonic circulations that developed in the north Siberia region and northeast Australia (NEA), respectively, throughout all layers in the troposphere. The large anomalous anticyclonic pattern in the North Siberia region was related to the blocking high, while the anomalous cyclonic pattern that developed in NEA was related to the East Asian summer monsoon (EASM) front. The difference in the sea surface temperature (SST) between the two groups was also analysed. In the North Atlantic Ocean, a tripole structure appeared with a cold anomaly in the high latitudes, a warm anomaly in the mid‐latitudes and a cold anomaly again in the low latitudes, which is a typical spatial distribution of the SST anomaly related to the positive North Atlantic Oscillation (NAO) phase. |
author2 |
Rural Development Administration |
format |
Article in Journal/Newspaper |
author |
Choi, Jae‐Won Song, Chan‐Yeong Kim, Eung‐Sup Ahn, Joong‐Bae |
spellingShingle |
Choi, Jae‐Won Song, Chan‐Yeong Kim, Eung‐Sup Ahn, Joong‐Bae Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
author_facet |
Choi, Jae‐Won Song, Chan‐Yeong Kim, Eung‐Sup Ahn, Joong‐Bae |
author_sort |
Choi, Jae‐Won |
title |
Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
title_short |
Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
title_full |
Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
title_fullStr |
Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
title_full_unstemmed |
Possible relationship between heatwaves in Korea and the summer blocking frequency in the Sea of Okhotsk |
title_sort |
possible relationship between heatwaves in korea and the summer blocking frequency in the sea of okhotsk |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/joc.7659 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7659 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7659 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7659 |
genre |
North Atlantic North Atlantic oscillation Siberia |
genre_facet |
North Atlantic North Atlantic oscillation Siberia |
op_source |
International Journal of Climatology volume 42, issue 15, page 7497-7515 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.7659 |
container_title |
International Journal of Climatology |
container_volume |
42 |
container_issue |
15 |
container_start_page |
7497 |
op_container_end_page |
7515 |
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1810462937702203392 |