한국해양대학교

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계절예측시스템을 이용한 엘니뇨와 관련된 동아시아-북태평양의 겨울내 대기순환 변동 분석

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dc.contributor.author 김선용 -
dc.date.accessioned 2017-02-22T05:22:42Z -
dc.date.available 2017-02-22T05:22:42Z -
dc.date.issued 2015 -
dc.date.submitted 57069-08-26 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174568 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/8619 -
dc.description.abstract Though tropical SST anomalies associated with El Niño change slowly during the mature phase of El Niño, the resultant extratropical teleconnection patterns are quite different with time. In this study, the intra-winter changes in the teleconnection pattern associated with El Niño are investigated using the NCEP reanalysis and observational data and the high-resolution seasonal prediction data. The observational analyses show that there are distinctively changes in the teleconnection pattern over the North Pacific within the winter. In the early winter (November-December) of El Niño years, there is a distinctive anomalous Kuroshio anticyclone, which is closely related to the East Asian climate. In January, in contrast, the Kuroshio anticyclone suddenly disappears and a strong cyclonic flow, which is part of the Pacific-North American (PNA) teleconnection pattern, develops. It is suggested that the intra-winter changes are controlled by the relative roles of the equatorial central Pacific (CP) and western north Pacific (WNP) precipitation anomalies on the extratropical teleconnection over the North Pacific. On the other hand, the prediction data failed to capture the observed intra-winter changes in the teleconnection pattern, though the predictive skills for tropical SST and precipitation are high. It is revealed that this model’s discrepancy in the extratropical teleconnection is partly originated from the failure in predicting the relative magnitude of CP and WNP precipitation anomalies. Further analyses on the ensemble spread of the prediction data support the relative roles of CP and WNP precipitation anomalies in affecting the extratropical circulation over the North Pacific. -
dc.description.tableofcontents Contents List of Figures Abstract 1. Introduction 2. Data and model 2.1 GloSea5 model 2.2 Reanalysis and Oobservation data 3. Verification of the prediction skill 4. Teleconnection overto East Asia and North Pacific 5. Teleconnection difference from ensemble spread 6. Climatological field in tropics and extratropics 7. Summary and discussion References -
dc.language eng -
dc.publisher Ocean Science and Technology School -
dc.title 계절예측시스템을 이용한 엘니뇨와 관련된 동아시아-북태평양의 겨울내 대기순환 변동 분석 -
dc.title.alternative Intra-winter atmospheric circulation changes over East Asia and North Pacific associated with ENSO in a seasonal prediction model -
dc.type Thesis -
dc.date.awarded 2015-02 -
dc.contributor.alternativeName Sunyong Kim -
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해양과학기술융합학과 > Thesis
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