Investigating subsurface pathways of Fukushima cesium in the Northwest Pacific
Date
2019-06-18Metadata
Show full item recordCitable URI
https://hdl.handle.net/1912/24556As published
https://doi.org/10.1029/2019GL082500DOI
10.1029/2019GL082500Keyword
Fukushima tracer; transport across Kuroshio Extension current; subsurface pathways and barriers; mode waters; particle trackingAbstract
Advective pathways for Fukushima Daiichi Nuclear Power Plant (FDNPP)‐derived cesium observed in 2013 at 166°E south of the Kuroshio Extension (KE) at >500 m on the 26.5σθ isopycnal are investigated. Attention is paid to the KE's role in shaping these pathways. Using a high‐resolution model, particle trajectories were simulated backward and forward in time on 26.5σθ between the 2013 observations and the 2011 source. A large fraction of backtracked trajectories interacted with the mixed layer just offshore of the FDNPP. The likeliest pathway reaching the deepest 2013 observed cesium location runs along the KE out to ~165°E, where it turns sharply southward. Forward trajectory statistics suggest that for 26.5σθ waters originating north of the KE, this current acted as a permeable barrier west of 155–160°E. The deepest 2011 model mixed layers suggest that FDNPP‐derived radionuclides may have been present at 30°N in 2013 at greater depths and densities (700 m; 26.8σθ).
Description
A© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Cedarholm, E. R., Rypina, I. I., Macdonald, A. M., & Yoshida, S. Investigating subsurface pathways of Fukushima cesium in the Northwest Pacific. Geophysical Research Letters, 46(12), (2019): 6821-6829, doi:10.1029/2019GL082500.
Collections
Suggested Citation
Cedarholm, E. R., Rypina, I. I., Macdonald, A. M., & Yoshida, S. (2019). Investigating subsurface pathways of Fukushima cesium in the Northwest Pacific. Geophysical Research Letters, 46(12), 6821-6829.The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International
Related items
Showing items related by title, author, creator and subject.
-
Investigation on acoustic reception pathways in finless porpoise (Neophocaena asiaorientalis sunameri) with insight into an alternative pathway
(2018-10)Sound transmission and reception are both vital components to odontocete echolocation and daily life. Here, we combine computed tomography (CT) scanning and Finite Element Modeling to investigate the acoustic propagation ... -
Short-term dispersal of Fukushima-derived radionuclides off Japan : modeling efforts and model-data intercomparison
(Copernicus Publications on behalf of the European Geosciences Union, 2013-07-24)The Great East Japan Earthquake and tsunami that caused a loss of power at the Fukushima nuclear power plants (FNPP) resulted in emission of radioactive isotopes into the atmosphere and the ocean. In June of 2011, an ... -
Fukushima 137Cs at the base of planktonic food webs off Japan
(2015-09-18)The potential bioaccumulation of 137Cs in marine food webs off Japan became a concern following the release of radioactive contaminants from the damaged Fukushima nuclear power plant into the coastal ocean. Previous ...
