https://scholars.lib.ntu.edu.tw/handle/123456789/493021
DC 欄位 | 值 | 語言 |
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dc.contributor.author | Chang, C.-C. | en_US |
dc.contributor.author | Burr, G.S. | en_US |
dc.contributor.author | Jull, A.J.T. | en_US |
dc.contributor.author | Russell, J.L. | en_US |
dc.contributor.author | Biddulph, D. | en_US |
dc.contributor.author | White, L. | en_US |
dc.contributor.author | Prouty, N.G. | en_US |
dc.contributor.author | Chen, Y.-G. | en_US |
dc.contributor.author | Shen, C.-C. | en_US |
dc.contributor.author | Zhou, W. | en_US |
dc.contributor.author | CHUAN-CHOU SHEN | en_US |
dc.contributor.author | YUE-GAU CHEN | en_US |
dc.creator | CHUAN-CHOU SHEN;Lam, D.D.;Zhou, W.;Shen, C.-C.;Chen, Y.-G.;Prouty, N.G.;White, L.;Biddulph, D.;Russell, J.L.;Jull, A.J.T.;Burr, G.S.;Chang, C.-C. | - |
dc.date.accessioned | 2020-05-15T07:00:36Z | - |
dc.date.available | 2020-05-15T07:00:36Z | - |
dc.date.issued | 2016 | - |
dc.identifier.uri | https://scholars.lib.ntu.edu.tw/handle/123456789/493021 | - |
dc.description.abstract | The long-lived radionuclide 129I (half-life: 15.7 × 106 yr) is well-known as a useful environmental tracer. At present, the global 129I in surface water is about 1–2 orders of magnitude higher than pre-1960 levels. Since the 1990s, anthropogenic 129I produced from industrial nuclear fuels reprocessing plants has been the primary source of 129I in marine surface waters of the Atlantic and around the globe. Here we present four coral 129I time series records from: 1) Con Dao and 2) Xisha Islands, the South China Sea, 3) Rabaul, Papua New Guinea and 4) Guam. The Con Dao coral 129I record features a sudden increase in 129I in 1959. The Xisha coral shows similar peak values for 129I as the Con Dao coral, punctuated by distinct low values, likely due to the upwelling in the central South China Sea. The Rabaul coral features much more gradual 129I increases in the 1970s, similar to a published record from the Solomon Islands. The Guam coral 129I record contains the largest measured values for any site, with two large peaks, in 1955 and 1959. Nuclear weapons testing was the primary 129I source in the Western Pacific in the latter part of the 20th Century, notably from testing in the Marshall Islands. The Guam 1955 peak and Con Dao 1959 increases are likely from the 1954 Castle Bravo test, and the Operation Hardtack I test is the most likely source of the 1959 peak observed at Guam. Radiogenic iodine found in coral was carried primarily through surface ocean currents. The coral 129I time series data provide a broad picture of the surface distribution and depth penetration of 129I in the Pacific Ocean over the past 60 years. © 2016 The Authors | - |
dc.relation.ispartof | Journal of Environmental Radioactivity | - |
dc.subject.classification | [SDGs]SDG14 | - |
dc.subject.other | Industrial plants; Nuclear fuel reprocessing; Nuclear weapons; Radioactive tracers; Surface waters; Time series; Coral; Environmental tracers; Long-lived radionuclides; Nuclear weapons testing; Ocean mixing; Surface distributions; Surface ocean; ^129I; Ocean currents; iodine 129; radioactive iodine; sea water; water pollutant; anthropogenic effect; coral; iodine; nuclear weapons testing; oceanic current; radionuclide; reconstruction; seawater; surface water; testing method; time series; tracer; twentieth century; upwelling; Article; atomic bomb; China; circulation; coral; environmental radioactivity; Guam; Marshall Islands; ocean current; Papua New Guinea; sea; Solomon Islands; surface property; time series analysis; Viet Nam; analysis; animal; Anthozoa; chemical model; chemistry; half life time; island (geological); Pacific Ocean; radiation monitoring; water flow; water pollutant; Con Dao Islands; Guam; Mariana Islands; Marshall Islands; Pacific Ocean; Pacific Ocean (West); Papua New Guinea; Paracel Islands; Solomon Islands [(ISG) Melanesia]; South China Sea; Viet Nam; Anthozoa; Animals; Anthozoa; Half-Life; Iodine Radioisotopes; Islands; Models, Chemical; Nuclear Weapons; Pacific Ocean; Radiation Monitoring; Seawater; Water Movements; Water Pollutants, Radioactive | - |
dc.title | Reconstructing surface ocean circulation with 129I time series records from corals | - |
dc.type | journal article | en |
dc.identifier.doi | 10.1016/j.jenvrad.2016.09.016 | - |
dc.identifier.scopus | 2-s2.0-84990837071 | - |
dc.identifier.url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990837071&doi=10.1016%2fj.jenvrad.2016.09.016&partnerID=40&md5=0b40f80f86c4f3b524bd0d5ed0377367 | - |
dc.relation.pages | 144-150 | - |
dc.relation.journalvolume | 165 | - |
item.fulltext | no fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.openairetype | journal article | - |
item.grantfulltext | none | - |
crisitem.author.dept | Geosciences | - |
crisitem.author.orcid | 0000-0003-2833-2771 | - |
crisitem.author.orcid | 0000-0002-8693-583X | - |
crisitem.author.parentorg | College of Science | - |
顯示於: | 地質科學系 |
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