Tracking the Fate of Particle Associated Fukushima Daiichi Cesium in the Ocean off Japan
-
- Ken O. Buesseler
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 2543, United States
-
- Christopher R. German
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 2543, United States
-
- Makio C. Honda
- Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
-
- Shigeyoshi Otosaka
- Japan Atomic Energy Agency, Tokai-mura Ibaraki 319-1112, Japan
-
- Erin E. Black
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 2543, United States
-
- Hajime Kawakami
- Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
-
- Steven J. Manganini
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 2543, United States
-
- Steven M. Pike
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 2543, United States
書誌事項
- 公開日
- 2015-07-29
- 資源種別
- journal article
- DOI
-
- 10.1021/acs.est.5b02635
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
A three year time-series of particle fluxes is presented from sediment traps deployed at 500 and 1000 m at a site 115 km southeast of Fukushima Daiichi Nuclear Power Plant (FDNPP). Results show a high fraction of lithogenic material and mass flux peaks that do not align between the trap depths, suggesting a lateral source of sediments. Fukushima cesium-137 and cesium-134 were enhanced in flux peaks that, given variations in trap (137)Cs/(210)Pbex ratios, are characteristic of material derived from shelf and slope sediments found from120 to500 m. These lateral flux peaks are possibly triggered by passing typhoons. The Cs fluxes are an order of magnitude higher than were previously reported for the trap located 100 km due east of FDNPP. We attribute this large difference to the position of our trap under the southeasterly currents that carry contaminated waters and resuspended sediments away from FDNPP and into the Pacific. These higher Cs sedimentary fluxes offshore are still small relative to the inventory of Cs currently buried nearshore. Consequently, we do not expect them to effect any rapid decrease in Cs levels for the coastal sediments near FDNPP that have been linked to enhanced Cs in demersal fish.
収録刊行物
-
- Environmental Science & Technology
-
Environmental Science & Technology 49 (16), 9807-9816, 2015-07-29
American Chemical Society (ACS)