气候变化领域集成服务门户(CCPortal): Cryoconite: An efficient accumulator of radioactive fallout in glacial environments

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DOI	10.5194/tc-14-657-2020
	Cryoconite: An efficient accumulator of radioactive fallout in glacial environments
	Baccolo G.; Łokas E.; Gaca P.; Massabò D.; Ambrosini R.; Azzoni R.S.; Clason C.; Di Mauro B.; Franzetti A.; Nastasi M.; Prata M.; Prati P.; Previtali E.; Delmonte B.; Maggi V.
发表日期	2020
ISSN	19940416
起始页码	657
结束页码	672
卷号	14 期号:2
英文摘要	Cryoconite is rich in natural and artificial radioactivity, but a discussion about its ability to accumulate radionuclides is lacking. A characterization of cryoconite from two Alpine glaciers is presented here. Results confirm that cryoconite is significantly more radioactive than the matrices usually adopted for the environmental monitoring of radioactivity, such as lichens and mosses, with activity concentrations exceeding 10 000 Bq kg-1 for single radionuclides. This makes cryoconite an ideal matrix to investigate the deposition and occurrence of radioactive species in glacial environments. In addition, cryoconite can be used to track environmental radioactivity sources. We have exploited atomic and activity ratios of artificial radionuclides to identify the sources of the anthropogenic radioactivity accumulated in our samples. The signature of cryoconite from different Alpine glaciers is compatible with the stratospheric global fallout and Chernobyl accident products. Differences are found when considering other geographic contexts. A comparison with data from literature shows that Alpine cryoconite is strongly influenced by the Chernobyl fallout, while cryoconite from other regions is more impacted by events such as nuclear test explosions and satellite reentries. To explain the accumulation of radionuclides in cryoconite, the glacial environment as a whole must be considered, and particularly the interaction between ice, meltwater, cryoconite and atmospheric deposition. We hypothesize that the impurities originally preserved into ice and mobilized with meltwater during summer, including radionuclides, are accumulated in cryoconite because of their affinity for organic matter, which is abundant in cryoconite. In relation to these processes, we have explored the possibility of exploiting radioactivity to date cryoconite. © Author(s) 2020.
英文关键词	atmospheric deposition; Chernobyl accident; environmental monitoring; fallout; glacial environment; glacier dynamics; radionuclide migration; valley glacier; Chernobyl; Kiev [Ukraine]; Ukraine; Bryophyta
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202021
作者单位	Environmental and Earth Sciences Department, University of Milano-Bicocca, Milan, 20126, Italy; INFN Section of Milano-Bicocca, Milan, 20126, Italy; Department of Nuclear Physical Chemistry, Institute of Nuclear Physics Polish Academy of Sciences, Cracow, 31-342, Poland; Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton, SO14 3ZH, United Kingdom; Physics Department, University of Genoa, Genoa, 16146, Italy; INFN Section of Genoa, Genoa, 16146, Italy; Department of Environmental Science and Policy, University of Milan, Milan, 20133, Italy; School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL48AA, United Kingdom; Physics Department, University of Milano-Bicocca, Milan, 20126, Italy; Laboratory of Applied Nuclear Energy, University of Pavia, Pavia, 27100, Italy
推荐引用方式 GB/T 7714	Baccolo G.,Łokas E.,Gaca P.,et al. Cryoconite: An efficient accumulator of radioactive fallout in glacial environments[J],2020,14(2).
APA	Baccolo G..,Łokas E..,Gaca P..,Massabò D..,Ambrosini R..,...&Maggi V..(2020).Cryoconite: An efficient accumulator of radioactive fallout in glacial environments.Cryosphere,14(2).
MLA	Baccolo G.,et al."Cryoconite: An efficient accumulator of radioactive fallout in glacial environments".Cryosphere 14.2(2020).