http://scholars.ntou.edu.tw/handle/123456789/19555
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Huang, Wei-Jen | en_US |
dc.contributor.author | Lee, Ming-Ta | en_US |
dc.contributor.author | Huang, Kuei-Chen | en_US |
dc.contributor.author | Kao, Kai-Jung | en_US |
dc.contributor.author | Lee, Ming-An | en_US |
dc.contributor.author | Yang, Yiing-Jang | en_US |
dc.contributor.author | Jan, Sen | en_US |
dc.contributor.author | Chen, Chen-Tung Arthur | en_US |
dc.date.accessioned | 2022-01-03T02:20:17Z | - |
dc.date.available | 2022-01-03T02:20:17Z | - |
dc.date.issued | 2021-11-17 | - |
dc.identifier.issn | 2045-2322 | - |
dc.identifier.uri | http://scholars.ntou.edu.tw/handle/123456789/19555 | - |
dc.description.abstract | The release of anthropogenic radiocesium to the North Pacific Ocean (NPO) has occurred in the past 60 years. Factors controlling Cs-137 (half-life, 30.2 year) and Cs-134 (half-life, 2.06 year) activity concentrations in the Kuroshio east of Taiwan and the Taiwan Strait (latitude 20 degrees N-27 degrees N, longitude 116 degrees E-123 degrees E) remain unclear. This study collected seawater samples throughout this region and analyzed Cs-134 and Cs-137 activity concentrations between 2018 and 2019. A principal component analysis (PCA) was performed to analyze the controlling factors of radiocesium. Results of all Cs-134 activity concentrations were below the detection limit (0.5 Bq m(-3)). Analyses of water column Cs-137 profiles revealed a primary concentration peak (2.1-2.2 Bq m(-3)) at a depth range of 200-400 m (potential density sigma(theta:) 25.3 to 26.1 kg m(-3)). The PCA result suggests that this primary peak was related to density layers in the water column. A secondary Cs-137 peak (1.90 Bq m(-3)) was observed in the near-surface waters (sigma(theta) = 18.8 to 21.4 kg m(-3)) and was possibly related to upwelling and river-to-sea mixing on the shelf. In the Taiwan Strait, Cs-137 activity concentrations in the near-surface waters were higher in the summer than in the winter. We suggest that upwelling facilitates the vertical transport of Cs-137 at the shelf break of the western NPO. | en_US |
dc.language.iso | English | en_US |
dc.publisher | NATURE PORTFOLIO | en_US |
dc.relation.ispartof | SCIENTIFIC REPORTS | en_US |
dc.title | Radiocesium in the Taiwan Strait and the Kuroshio east of Taiwan from 2018 to 2019 | en_US |
dc.type | journal article | en_US |
dc.identifier.doi | 10.1038/s41598-021-01895-y | - |
dc.identifier.isi | WOS:000722246000074 | - |
dc.relation.journalvolume | 11 | en_US |
dc.relation.journalissue | 1 | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.openairetype | journal article | - |
item.languageiso639-1 | English | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.fulltext | no fulltext | - |
crisitem.author.dept | College of Ocean Science and Resource | - |
crisitem.author.dept | Department of Environmental Biology and Fisheries Science | - |
crisitem.author.dept | National Taiwan Ocean University,NTOU | - |
crisitem.author.dept | Department of Transportation Science | - |
crisitem.author.dept | College of Maritime Science and Management | - |
crisitem.author.dept | General Education Center | - |
crisitem.author.dept | Liberal Education Division | - |
crisitem.author.dept | Center of Excellence for Ocean Engineering | - |
crisitem.author.dept | River and Coastal Disaster Prevention | - |
crisitem.author.dept | Ecology and Environment Construction | - |
crisitem.author.orcid | 0000-0001-6970-7643 | - |
crisitem.author.parentorg | National Taiwan Ocean University,NTOU | - |
crisitem.author.parentorg | College of Ocean Science and Resource | - |
crisitem.author.parentorg | College of Maritime Science and Management | - |
crisitem.author.parentorg | National Taiwan Ocean University,NTOU | - |
crisitem.author.parentorg | National Taiwan Ocean University,NTOU | - |
crisitem.author.parentorg | General Education Center | - |
crisitem.author.parentorg | National Taiwan Ocean University,NTOU | - |
crisitem.author.parentorg | Center of Excellence for Ocean Engineering | - |
crisitem.author.parentorg | Center of Excellence for Ocean Engineering | - |
顯示於: | 環境生物與漁業科學學系 |
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