134Cs and 137Cs in the North Pacific Ocean derived from the March 2011 TEPCO Fukushima Dai-ichi Nuclear Power Plant accident, Japan. Part one: surface pathway and vertical distributions

Aoyama, Michio; Hamajima, Yasunori; Hult, M.; Uematsu, Mitsuo; Oka, Eitarou; Tsumune, Daisuke; Kumamoto, Yuichiro

doi:10.1007/s10872-015-0335-z

Cited by 122 publications

(113 citation statements)

References 37 publications

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“…The first recording of Fukushima‐derived radioactive Cs in the eastern side of the North Pacific shows good agreement with the eastward speed of Fukushima‐derived radioactive Cs as 5 cm sec −1 in the central and eastern North Pacific estimated by Aoyama et al . (). Some of the global circulation models (Behrens et al ., ; Rypina et al ., ) also closely simulated the results of Smith et al .…”

Section: Surface Dispersion Of Radioactive Cesium In the North Pacificmentioning

confidence: 97%

“…In the formation area of CMW, Aoyama et al . () reported the Fukushima‐derived radioactive Cs both in STMW and CMW during June 2012 along the 165˚E transect. Most of the Fukushima‐derived radioactive Cs (more than 80% of the water column inventory) had been distributed in the CMW at 165˚E transect.…”

Section: Subsurface Intrusion Of Radioactive Cesium With Mode Watersmentioning

confidence: 99%

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Oceanic dispersion of Fukushima‐derived radioactive cesium: a review

Kaeriyama

2016

Fisheries Oceanography

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This review summarizes the more than 70 papers published during the 4 years since the Fukushima Dai-ichi nuclear power plant accident that occurred on 11 March 2011, and details the radioactive cesium dispersion pattern in the North Pacific and adjacent seas. The total amount of Fukushima-derived radioactive cesium released into the North Pacific via atmospheric deposition and direct release, spatial and temporal changes in the Pacific coast around the accident site, and the concentration levels of radioactive cesium around the Japanese Islands, not only the Pacific coast but also in adjacent seas, such as Japan Sea, East China Sea are summarized. Based on observational data mostly obtained during 2 years since the accident, and simulation results, oceanic dispersion of radioactive cesium in the entire area of the North Pacific is described. The Fukushima-derived radioactive cesium dispersed eastward as surface water and extended to the eastern side of the North Pacific in 2014, and was also observed via a southward intrusion to subsurface waters as Subtropical Mode Water and Central Mode Water. The radioactive cesium movement related to mode water is important in terms of the circulation of cesium into the ocean interior. Some new technologies and techniques concerning emergency monitoring of radioactivity in the ocean environment are also reported, the effectiveness of which has been demonstrated by use in relation to the Fukushima accident.

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Section: Surface Dispersion Of Radioactive Cesium In the North Pacificmentioning

confidence: 97%

Section: Subsurface Intrusion Of Radioactive Cesium With Mode Watersmentioning

confidence: 99%

Oceanic dispersion of Fukushima‐derived radioactive cesium: a review

Kaeriyama

2016

Fisheries Oceanography

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“…Aoyama et al (2016) Inomata et al (2016) and 16.1 ± 1.4 PBq by Tsubono et al (2016), which used more comprehensive ocean data sets and interpolation methods and models.…”

Section: Figurementioning

confidence: 99%

Fukushima Daiichi–Derived Radionuclides in the Ocean: Transport, Fate, and Impacts

Buesseler

Dai

Aoyama

et al. 2017

Annu. Rev. Mar. Sci.

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246

122

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The events that followed the Tohoku earthquake and tsunami on March 11, 2011, included the loss of power and overheating at the Fukushima Daiichi nuclear power plants, which led to extensive releases of radioactive gases, volatiles, and liquids, particularly to the coastal ocean. The fate of these radionuclides depends in large part on their oceanic geochemistry, physical processes, and biological uptake. Whereas radioactivity on land can be resampled and its distribution mapped, releases to the marine environment are harder to characterize owing to variability in ocean currents and the general challenges of sampling at sea. Five years later, it is appropriate to review what happened in terms of the sources, transport, and fate of these radionuclides in the ocean. In addition to the oceanic behavior of these contaminants, this review considers the potential health effects and societal impacts.

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“…). However, a rapid decrease in the radiocesium concentration in seawater (Aoyama et al ., ) would be expected to result in reduced contamination levels in marine organisms, especially pelagic fish species (Buesseler, ; Wada et al ., ). The radiocesium concentrations in marine fish species off the coast of Fukushima Prefecture have decreased significantly, whereas time‐series trends of radiocesium concentration have been shown to differ among taxa, habitats and spatial distributions (Wada et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Radiocesium contamination of aquatic organisms in the estuary of the Abukuma River flowing through Fukushima

Shigenobu

Ambe

Ono

et al. 2017

Fisheries Oceanography

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In the summer of 2013, we measured the radiocesium ( 134 Cs and 137 Cs) concentrations in aquatic organisms inhabiting the estuary of the Abukuma River, which flows through the Fukushima and Miyagi Prefectures. Radiocesium concentrations in four muscle-tissue samples of blackhead seabream (Acanthopagrus schlegeli) [1240, 914, 202 and 106 Bq kg À1 wet weight (w.w.)] and two whole-body samples deriving from multiple individuals of flathead grey mullet (Mugil cephalus) (129 and 110 Bq kg À1 w.w.) exceeded the Japanese standard limit for radiocesium levels in foods (100 Bq kg À1 w.w.). However, radiocesium concentrations in the other fish samples were lower than the Japanese standard limit. In addition, radiocesium concentrations in crustaceans, major prey items of omnivorous and carnivorous fish species in the Abukuma River estuary, were generally low (0.444-15.1 Bq kg À1 w.w.). Stable isotope analysis indicated that the feeding habit of the three heavily contaminated blackhead seabream, which the radiocesium concentrations were about several times or more higher than the Japanese standard limit, were similar to those of other individuals collected from the same sampling site. Therefore, the difference in the radiocesium level between the three heavily contaminated individuals and the lesscontaminated individuals of blackhead seabream was not because of a recent feeding habit in the Abukuma River estuary. Environmental conditions in the Abukuma River estuary in the summer of 2013 would not have had the potential to increase radiocesium concentrations in the muscle tissues of fish inhabiting the estuary to levels greater than 100 Bq kg À1 w.w.

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134Cs and 137Cs in the North Pacific Ocean derived from the March 2011 TEPCO Fukushima Dai-ichi Nuclear Power Plant accident, Japan. Part one: surface pathway and vertical distributions

Cited by 122 publications

References 37 publications

Oceanic dispersion of Fukushima‐derived radioactive cesium: a review

Oceanic dispersion of Fukushima‐derived radioactive cesium: a review

Fukushima Daiichi–Derived Radionuclides in the Ocean: Transport, Fate, and Impacts

Radiocesium contamination of aquatic organisms in the estuary of the Abukuma River flowing through Fukushima

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