フクシマを海洋から考察する Fukushima: A View from the Ocean

English Below

講師 ケン・ベッセラー(米国ウッズホール海洋研究所 海洋・環境放射能センター長)

広島平和研究所では、下記のとおりHPI研究フォーラムを開催しました。

      

  
1.  テーマ
「フクシマを海洋から考察する」

2.  日時
2019年3月20日(水)18:00-20:00


3.  場所
広島市立大学サテライトキャンパス セミナールーム2
広島市中区大手町4-1-1大手町平和ビル9階(市役所本庁舎向い)


4.  講演の概要
2011年3月に発生した地震と津波、福島第一原子力発電所からの放射性物質の放出という大惨事の連鎖は、社会にとっても海洋にとっても未曾有の出来事であった。
この講演では、福島第一原子力発電所から放出された放射性汚染物質の概要、及び、これまでの8年間の調査で明らかにされたことを報告する。また、福島原発由来の放射性核種(放射能をもつ原子核の種類)はどのような影響を及ぼすのか、海洋の未来を見据える。
具体的には、特に放射性セシウムに着目しながら時系列観測データを分析し、海洋における汚染物質の移流拡散、及び、海洋魚が種別に含有する放射性物質の量的変化を検証する。さらに海洋生物相や堆積物の放射能レベルの長期的傾向、貯蔵タンク内の汚染水処理、放射性セシウム含有微粒子の検出など、未解決の重要課題についても議論してみたい。

5.  講師の略歴
ケン・ベッセラー博士は、米国ウッズホール海洋研究所(WHOI)の海洋科学者であり、海洋に存在する天然及び人工放射性核種の研究を専門としている。その研究領域は、大気圏内核実験の放射性降下物、チェルノブイリ事故の黒海への影響評価、太平洋における福島第一原子力発電所からの放射性核種汚染の調査など幅広い。ベッセラー氏は、WHOI海洋化学・地球化学部長、米国国立科学財団・化学海洋学プログラム参事等を経て、現在は、WHOI海洋・環境放射能センター(Center for Marine and Environmental Radioactivity)長を務める。2011年には、英タイムズ社の高等教育情報誌(Times Higher Education)により、2000年~2010年の10年間で最も多く論文が引用された海洋科学者に選出されている。

HPI Research Forum on March 20, 2019

〝Fukushima: A View from the Ocean″ 

 By Dr. Ken Buesseler, Director of the Center for Marine and Environmental Radioactivity, Woods Hole Oceanographic Institution (WHOI), USA

The Hiroshima Peace Institute held the HPI Research Forum as follows:

1. Topic
"Fukushima: A View from the Ocean"

2. Lecturer
Ken Buesseler, Director of the Center for Marine and Environmental Radioactivity, Woods Hole Oceanographic Institution, USA

3. Date and Time
March 20, 2019 (Wed.) 18:00-20:00


4. Venue
Seminar Room 2, Satellite Campus, Hiroshima City University
9F Otemachi Heiwa Building, 4-1-1 Otemachi, Nakaku, Hiroshima


5. Abstract of the Forum

The triple disaster of the March 11, 2011 earthquake, tsunami, and subsequent radiation releases at Fukushima Dai-ichi were unprecedented events for the ocean and society. This pubic lecture will provide an overview and 8 year update regarding the radioactive contaminants released from the Fukushima Daiichi Nuclear Power Plants. The talk will consider the radioactive world we live in and address the specific fate of Fukushima radionuclides in the ocean, with an eye to the future ocean.  The emphasis is on the radioactive forms of cesium, though other radionuclides are also considered.  Topics include:  sources from atmospheric and ocean discharges in 2011; a Pacific Ocean time-series that tracks the transport of contaminants across the ocean; an extended time-series in marine fish that examines species specific variability in radionuclide content; and a discussion of the burial of particle associated contaminants on the seafloor.  The look to the future includes estimates of ongoing releases from groundwater associated with beach sands in comparison to other land sources, such as rivers and operations during decommissioning.  We end by considering the long term trends in radioactivity levels in marine biota and sediments, with comparisons to other sites in the world, and open discussion on key issues that have yet to be resolved, such as the fate of contaminated water in the storage tanks and discovery of cesium microparticles.


6. Profile of Ken Buesseler

Dr. Buesseler is a Senior Scientist at the Woods Hole Oceanographic Institution who specializes in the study of natural and man-made radionuclides in the ocean.  His work includes studies of fallout from atmospheric nuclear weapons testing, assessments of Chernobyl impacts on the Black Sea, and examination of radionuclide contaminants in the Pacific resulting from the Fukushima Daiichi nuclear power plants. Dr. Buesseler has served as Chair of the Marine Chemistry and Geochemistry Department at WHOI, and two years as an Associate Program Director at the US National Science Foundation, Chemical Oceanography Program. In 2009 he was elected Fellow of the American Geophysical Union and in 2018 as a Fellow of the American Association for the Advancement of Science (AAAS).  In 2011 he was noted as the top cited ocean scientist by the Times Higher Education for the decade 2000-2010, and he is a foreign member of the Royal Netherlands Academy of Arts and Sciences.  He was honored in 2013 by the Japan Society for the Promotion of Science with their highest level Fellowship award for overseas researchers “who are Nobel laureates or recipients of similarly high level international prizes who currently occupy a leading position in their subject field”. He is currently Director of the Center for Marine and Environmental Radioactivity at WHOI (http://www.whoi.edu/CMER), and regularly speaks to public audiences and engages citizens as part of Our Radioactive Ocean.