Spatiotemporal change of cesium-137 in the Pacific coast of Tohoku, Japan: The mussel watch approach

MARINE POLLUTION BULLETIN

卷:168

Article

Murakami-Sugihara, Naoko¹  Shirai, Kotaro¹  Tazoe, Hirofumi²  Mizukawa, Kaoruko³  Takada, Hideshige³  Yamagata, Takeyasu⁴  Otosaka, Shigeyoshi¹  Ogawa, Hiroshi¹ 

[1] Univ Tokyo, Atmosphere & Ocean Res Inst, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778564, Japan

[2] Hirosaki Univ, Inst Radiat Emergency Med, 66-1 Hon Cho, Hirosaki, Aomori 0368564, Japan

[3] Tokyo Univ Agr & Technol, 3-5-8 Saiwai Cho, Fuchu, Tokyo 1838509, Japan

[4] Univ Tokyo, Univ Museum, Bunkyo Ku, 2-11-16 Yayoi, Tokyo 1130032, Japan

关键词: Radiocesium;    Fukushima;    Mussel watch;    Coastal area;   

DOI  :  10.1016/j.marpolbul.2021.112413

来源: Elsevier

【 摘 要 】

We measured radiocesium in mussel tissue collected from the Pacific coast of Tohoku from 2011 to 2015 to investigate the temporal and spatial dynamics of radiocesium in the coastal area. Radioactive 137Cs was detected in all the samples collected in 2011, but it was not found in samples from localities north of Sendai after 2012. In contrast, 137Cs was detected in many sites in the Fukushima area even from 2012 to 2015. The fluctuation of 137Cs concentration in mussel tissue seems to reflect the 137Cs concentration in suspended particles in the seawater, suggesting that there was an influx of soil deposition and resuspension of seabed sediment. These results suggest that the 137Cs concentration in mussel tissue sensitively indicates the 137Cs concentration in the environment, and that the mussel watch approach is an effective way to understand the dynamics of radiocesium concentrations in coastal areas.

【 授权许可】

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