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Sub-Seasonal Variability of ENSO Teleconnections in Western North America and Its Prediction Skill

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dc.contributor.authorPark, Chang-Hyun-
dc.contributor.authorChoi, Jung-
dc.contributor.authorSon, Seok-Woo-
dc.contributor.authorKim, Daehyun-
dc.contributor.authorYeh, Sang-Wook-
dc.contributor.authorKug, Jong-Seong-
dc.date.accessioned2024-05-07T01:30:24Z-
dc.date.available2024-05-07T01:30:24Z-
dc.date.created2023-04-28-
dc.date.created2023-04-28-
dc.date.issued2023-03-
dc.identifier.citationJournal of geophysical research - Atmospheres, Vol.128 No.6, p. 037985-
dc.identifier.issn2169-897X-
dc.identifier.urihttps://hdl.handle.net/10371/200934-
dc.description.abstractThe El Niño–Southern Oscillation (ENSO) significantly affects the wintertime surface climate in western North America (WNA) via the Pacific/North American-like teleconnection pattern. Here, we show that the ENSO teleconnections over the WNA have significant sub-seasonal variation despite the persistence of ENSO-related tropical sea surface temperature anomalies throughout the entire winter. The ENSO–WNA teleconnections become substantially weakened in mid-winter, considerably weaker than those in early and late winter. This mid-winter weakening of the ENSO–WNA teleconnections is attributable to the convection over the equatorial Indian Ocean. In mid-December of El Niño winters, the anomalously-enhanced convection develops over the equatorial Indian Ocean and excites the teleconnection pattern with a 2-week time lag. This teleconnection largely opposes the Pacific/North American-like teleconnection pattern that is induced by anomalous convection over the equatorial central Pacific. Such sub-seasonal variation of ENSO teleconnections is poorly predicted by multi-model hindcasts, affecting the mid-latitude prediction skill. It particularly results in a poorer prediction skill of WNA surface air temperature in mid-winter than in late winter. This result highlights a need to better simulate the ENSO-related tropical convection and the associated teleconnections in the model to improve the long-lead prediction of the WNA surface climate.-
dc.language영어-
dc.publisherAmerican Geophysical Union-
dc.titleSub-Seasonal Variability of ENSO Teleconnections in Western North America and Its Prediction Skill-
dc.typeArticle-
dc.identifier.doi10.1029/2022JD037985-
dc.citation.journaltitleJournal of geophysical research - Atmospheres-
dc.identifier.wosid000973474000001-
dc.identifier.scopusid2-s2.0-85152588477-
dc.citation.number6-
dc.citation.startpage037985-
dc.citation.volume128-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorSon, Seok-Woo-
dc.contributor.affiliatedAuthorKim, Daehyun-
dc.contributor.affiliatedAuthorKug, Jong-Seong-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.subject.keywordPlusATMOSPHERIC RESPONSE-
dc.subject.keywordPlusPRECIPITATION-
dc.subject.keywordPlusCLIMATE-
dc.subject.keywordPlusSENSITIVITY-
dc.subject.keywordPlusPATTERNS-
dc.subject.keywordPlusEXTREMES-
dc.subject.keywordPlusPNA-
dc.subject.keywordAuthorENSO teleconnections-
dc.subject.keywordAuthorwestern north America-
dc.subject.keywordAuthorsub-seasonal variability-
dc.subject.keywordAuthorIndian ocean-
dc.subject.keywordAuthorsub-seasonal to seasonal prediction-
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  • College of Natural Sciences
  • Department of Earth and Environmental Sciences
Research Area Climate Change, Earth & Environmental Data, Severe Weather, 기후과학, 위험기상, 지구환경 데이터과학

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