Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns
ABSTRACT This study investigates the interannual variation of heat wave frequency ( HWF ) in South Korea during the past 42 years (1973–2014) and examines its connection with large‐scale atmospheric circulation changes. Korean heat waves tend to develop most frequently in late summer during July and...
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crwiley:10.1002/joc.4671 2024-09-09T19:26:56+00:00 Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns Lee, Woo‐Seop Lee, Myong‐In National Research Foundation of Korea Ministry of Science, ICT and Future Planning 2016 http://dx.doi.org/10.1002/joc.4671 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4671 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4671 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.4671 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4671 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ International Journal of Climatology volume 36, issue 15, page 4815-4830 ISSN 0899-8418 1097-0088 journal-article 2016 crwiley https://doi.org/10.1002/joc.4671 2024-08-20T04:16:27Z ABSTRACT This study investigates the interannual variation of heat wave frequency ( HWF ) in South Korea during the past 42 years (1973–2014) and examines its connection with large‐scale atmospheric circulation changes. Korean heat waves tend to develop most frequently in late summer during July and August. The leading Empirical Orthogonal Function accounting for 50% of the total variance shows a mono‐signed pattern over South Korea, suggesting that the dominant mechanisms responsible for the heat wave are linked in a spatial scale much larger than the nation. It also exhibits a regional variation with more occurrences in the southeastern inland area. The regression of the leading principal component ( PC ) time series of HWF with large‐scale atmospheric circulation identifies a north–south dipole pattern between the South China Sea and Northeast Asia. When this large‐scale circulation mode facilitates deep convection in South China Sea, it tends to weaken moisture transport from the South China Sea to Northeast Asia. Enhanced deep convection in the South China Sea triggers a source of Rossby wave train along southerly wind that generates positive geopotential height anomalies around Korea. The anomalous high pressure pattern is accompanied by large‐scale subsidence in Korea, thereby providing a favourable condition for extreme hot and dry days in Korea. This study highlights that there is a decadal change of the relationship between Korean heat waves and large‐scale atmospheric circulation patterns. The tropical forcing tends to be weakened in the recent decade, with more influences from the Arctic variability from the mid‐1990s. Article in Journal/Newspaper Arctic Wiley Online Library Arctic International Journal of Climatology 36 15 4815 4830 |
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English |
description |
ABSTRACT This study investigates the interannual variation of heat wave frequency ( HWF ) in South Korea during the past 42 years (1973–2014) and examines its connection with large‐scale atmospheric circulation changes. Korean heat waves tend to develop most frequently in late summer during July and August. The leading Empirical Orthogonal Function accounting for 50% of the total variance shows a mono‐signed pattern over South Korea, suggesting that the dominant mechanisms responsible for the heat wave are linked in a spatial scale much larger than the nation. It also exhibits a regional variation with more occurrences in the southeastern inland area. The regression of the leading principal component ( PC ) time series of HWF with large‐scale atmospheric circulation identifies a north–south dipole pattern between the South China Sea and Northeast Asia. When this large‐scale circulation mode facilitates deep convection in South China Sea, it tends to weaken moisture transport from the South China Sea to Northeast Asia. Enhanced deep convection in the South China Sea triggers a source of Rossby wave train along southerly wind that generates positive geopotential height anomalies around Korea. The anomalous high pressure pattern is accompanied by large‐scale subsidence in Korea, thereby providing a favourable condition for extreme hot and dry days in Korea. This study highlights that there is a decadal change of the relationship between Korean heat waves and large‐scale atmospheric circulation patterns. The tropical forcing tends to be weakened in the recent decade, with more influences from the Arctic variability from the mid‐1990s. |
author2 |
National Research Foundation of Korea Ministry of Science, ICT and Future Planning |
format |
Article in Journal/Newspaper |
author |
Lee, Woo‐Seop Lee, Myong‐In |
spellingShingle |
Lee, Woo‐Seop Lee, Myong‐In Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
author_facet |
Lee, Woo‐Seop Lee, Myong‐In |
author_sort |
Lee, Woo‐Seop |
title |
Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
title_short |
Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
title_full |
Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
title_fullStr |
Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
title_full_unstemmed |
Interannual variability of heat waves in South Korea and their connection with large‐scale atmospheric circulation patterns |
title_sort |
interannual variability of heat waves in south korea and their connection with large‐scale atmospheric circulation patterns |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/joc.4671 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4671 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4671 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.4671 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4671 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
International Journal of Climatology volume 36, issue 15, page 4815-4830 ISSN 0899-8418 1097-0088 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1002/joc.4671 |
container_title |
International Journal of Climatology |
container_volume |
36 |
container_issue |
15 |
container_start_page |
4815 |
op_container_end_page |
4830 |
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1809896465204510720 |