Refine your search:     
Report No.
 - 

Transport processes of particulate materials near the seabed off Fukushima inferred from $$^{129}$$I/$$^{137}$$Cs ratio in sediment

Otosaka, Shigeyoshi ; Sato, Yuhi; Suzuki, Takashi; Kuwabara, Jun

Transport processes of radionuclides derived from the accident of Fukushima Daiichi Nuclear Power Plant (FDNPP) near the seabed are inferred from relationship between $$^{129}$$I and $$^{137}$$Cs concentrations in seabed sediment collected from August 2011 to January 2013 at totally 24 stations. $$^{129}$$I and $$^{137}$$Cs concentrations in the sediment surface (0$$sim$$1 cm layer) were 0.04$$sim$$0.45 mBq/kg and 12$$sim$$230 Bq/kg, respectively. The $$^{129}$$I/$$^{137}$$Cs ratio generally increased with time and the increasing tendency was remarkable in the shelf break region (bottom depth: 200$$sim$$400 m). These results indicate that (1) particles with higher $$^{129}$$I and $$^{137}$$Cs ratio settled to the bottom layer after 2012, and (2) such "recently settled" particles were accumulated in the shelf break region. The $$^{129}$$I/$$^{137}$$Cs in seabed sediment would be a helpful indicator to trace the fate of particulate radionuclides from coast to the open ocean.

Accesses

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.