Evaluation of a regional ocean reanalysis system for the East Asian Marginal Seas based on the ensemble Kalman filter SCIE SCOPUS KCI

DC Field Value Language
dc.contributor.author Seo, Gwang-Ho -
dc.contributor.author Choi, Byoung-Ju -
dc.contributor.author Cho, Yang-Ki -
dc.contributor.author Kim, Young Ho -
dc.contributor.author Kim, Sangil -
dc.date.accessioned 2020-04-20T03:40:51Z -
dc.date.available 2020-04-20T03:40:51Z -
dc.date.created 2020-01-28 -
dc.date.issued 2015-03 -
dc.identifier.issn 1738-5261 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/2531 -
dc.description.abstract This study introduces the East Asian Marginal Seas (EAMS) reanalysis system and evaluates its products from 1982 to 2006. The EAMS reanalysis system consists of an ocean circulation model with 0.25A degrees horizontal grid spacing and a data assimilation module. Temperature profiles taken by ship and Argo floats as well as satellite-borne sea surface temperature (SST) were assimilated into the model by applying the ensemble Kalman filter every 7 days. The reanalyzed oceanic fields were compared with ones by the control run without data assimilation to assess the impact of the data assimilation. The assimilative model significantly improved the horizontal structures of SST, sea surface height (SSH), vertical structure of temperature, and volume transports through the major straits. Root-mean-square error (RMSE) of SST decreased from 1.0 to 0.6A degrees C. Horizontal and vertical distribution of subsurface temperature was corrected close to the observed values. High SSH variability in the south of Japan and in the Kuroshio extension region was partially restored. Overshooting of the Kuroshio Current and the East Korea Warm Current was suppressed to the south by the data assimilation. SSH and surface circulation in the Oyashio region and in the East Sea (also known as the Sea of Japan) recovered, which corrected the sea level difference between the East Sea and the Pacific Ocean and produced realistic transport through the Korea Strait. The reanalysis well resolved transport through the Korea Strait. The correlation coefficient with the transport based on an Acoustic Doppler Current Profiler measurement was 0.70 and the RMSE was 0.37 Sv (10(6) m(3)/s), whereas those were 0.59 and 0.43 Sv in the control run, respectively. The EAMS reanalysis dataset may help us to understand circulation variations in the marginal seas and to investigate factors controlling volume and heat transport. -
dc.description.uri 1 -
dc.language English -
dc.subject SOUTH CHINA SEA -
dc.subject KOREA STRAIT -
dc.subject PACIFIC-OCEAN -
dc.subject EAST/JAPAN SEA -
dc.subject MODEL -
dc.subject CURRENTS -
dc.title Evaluation of a regional ocean reanalysis system for the East Asian Marginal Seas based on the ensemble Kalman filter -
dc.type Article -
dc.citation.endPage 48 -
dc.citation.startPage 29 -
dc.citation.title OCEAN SCIENCE JOURNAL -
dc.citation.volume 50 -
dc.citation.number 1 -
dc.contributor.alternativeName 김영호 -
dc.identifier.bibliographicCitation OCEAN SCIENCE JOURNAL, v.50, no.1, pp.29 - 48 -
dc.identifier.doi 10.1007/s12601-015-0003-7 -
dc.identifier.scopusid 2-s2.0-84926391065 -
dc.identifier.wosid 000352217300003 -
dc.type.docType Article -
dc.identifier.kciid ART001972972 -
dc.description.journalClass 1 -
dc.subject.keywordPlus SOUTH CHINA SEA -
dc.subject.keywordPlus DATA ASSIMILATION -
dc.subject.keywordPlus VOLUME TRANSPORT -
dc.subject.keywordPlus LEVEL DIFFERENCE -
dc.subject.keywordPlus KOREA STRAIT -
dc.subject.keywordPlus TSUSHIMA STRAITS -
dc.subject.keywordPlus PACIFIC-OCEAN -
dc.subject.keywordPlus EAST/JAPAN SEA -
dc.subject.keywordPlus MODEL -
dc.subject.keywordPlus CURRENTS -
dc.subject.keywordAuthor reanalysis -
dc.subject.keywordAuthor data assimilation -
dc.subject.keywordAuthor Northwest Pacific -
dc.subject.keywordAuthor ensemble Kalman filter -
dc.subject.keywordAuthor transport -
dc.relation.journalWebOfScienceCategory Marine & Freshwater Biology -
dc.relation.journalWebOfScienceCategory Oceanography -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.description.journalRegisteredClass kci -
dc.relation.journalResearchArea Marine & Freshwater Biology -
dc.relation.journalResearchArea Oceanography -
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