气候变化领域集成服务门户(CCPortal): Eight-year variations in atmospheric radiocesium in Fukushima city

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DOI	10.5194/acp-22-675-2022
	Eight-year variations in atmospheric radiocesium in Fukushima city
	Watanabe, Akira; Kajino, Mizuo; Ninomiya, Kazuhiko; Nagahashi, Yoshitaka; Shinohara, Atsushi
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	675
结束页码	692
卷号	22 期号:1 页码:18
英文摘要	After the Fukushima nuclear accident, atmospheric Cs-134 and Cs-137 measurements were taken in Fukushima city for 8 years, from March 2011 to March 2019. The airborne surface concentrations and deposition of radiocesium (radio-Cs) were high in winter and low in summer; these trends are the opposite of those observed in a contaminated forest area. The effective half-lives of 137Cs in the concentrations and deposition before 2015 (0.754 and 1.30 years, respectively) were significantly shorter than those after 2015 (2.07 and 4.69 years, respectively), which was likely because the dissolved radio-Cs was discharged from the local terrestrial ecosystems more rapidly than the particulate radio-Cs. In fact, the dissolved fractions of precipitation were larger than the particulate fractions before 2015, but the particulate fractions were larger after 2016. X-ray fluorescence analysis suggested that biotite may have played a key role in the environmental behavior of particulate forms of radio-Cs after 2014. However, the causal relationship between the seasonal variations in particle size distributions and the possible sources of particles is not yet fully understood. The current study also proposes an evaluation method of the consistency of a numerical model for radio-Cs resuspension and suggests that improvements to the model are necessary.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000746467000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273405
作者单位	Fukushima University; Japan Meteorological Agency; University of Tsukuba; Osaka University; Osaka University
推荐引用方式 GB/T 7714	Watanabe, Akira,Kajino, Mizuo,Ninomiya, Kazuhiko,et al. Eight-year variations in atmospheric radiocesium in Fukushima city[J],2022,22(1):18.
APA	Watanabe, Akira,Kajino, Mizuo,Ninomiya, Kazuhiko,Nagahashi, Yoshitaka,&Shinohara, Atsushi.(2022).Eight-year variations in atmospheric radiocesium in Fukushima city.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(1),18.
MLA	Watanabe, Akira,et al."Eight-year variations in atmospheric radiocesium in Fukushima city".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.1(2022):18.