DOI: 10.1002/2015GL065259
论文题名: Observed eastward progression of the Fukushima 134Cs signal across the North Pacific
作者: Yoshida S. ; Macdonald A.M. ; Jayne S.R. ; Rypina I.I. ; Buesseler K.O.
刊名: Geophysical Research Letters
ISSN: 0094-9454
EISSN: 1944-9185
出版年: 2015
卷: 42, 期: 17 起始页码: 7139
结束页码: 7147
语种: 英语
英文关键词: Fukushima tracer
; mode waters
Scopus关键词: Hydrographic surveys
; Radioisotopes
; Deep penetration
; Detectable signal
; Fukushima
; Physical process
; Trace amounts
; Vertical distributions
; Water mass subduction
; Western Pacific
; Cesium
; cesium
; concentration (composition)
; mode water
; penetration
; radionuclide
; tracer
; weapon
; Fukushima [Fukushima (PRF)]
; Fukushima [Tohoku]
; Honshu
; Japan
; Pacific Ocean
; Pacific Ocean (North)
; Tohoku
英文摘要: Radionuclide samples taken as part of hydrographic surveys at 30N in the North Pacific reveal that the easternmost edge of Fukushima-derived 134Cs observed at 174.3W in 2012 had progressed eastward across the basin to 160.6W by 2013. The 2013 30N observations indicate surface 134Cs concentrations of 3-5 Bq/m3 between 160E and 160W, slightly lower concentrations west of 160E and no detectable signal east of 160.6W. Profile samples show 134Cs penetration to 500 m west of 180 with shoaling penetration depth toward to the east. The near-uniform vertical distribution of 137Cs between 152W and 121.3W in the top 500 m is indicative of trace amounts of radionuclides remaining from weapons testing. The physical processes responsible for the deep 134Cs penetration in the western Pacific appear to be related to distinct water mass subduction pathways; however, the timing and rapidity of deep penetration over the broad scales observed has yet to be clarified. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943353875&doi=10.1002%2f2015GL065259&partnerID=40&md5=bdd698f23691cb570fa40da0ecd14cb9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9069
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Recommended Citation:
Yoshida S.,Macdonald A.M.,Jayne S.R.,et al. Observed eastward progression of the Fukushima 134Cs signal across the North Pacific[J]. Geophysical Research Letters,2015-01-01,42(17).