气候变化领域集成服务门户(CCPortal): Impact of a massive dust storm on the gross alpha; gross beta; 40K; 137Cs; 210Pb; 7Be activities measured in atmospheric aerosols collected in Tenerife; Canary Islands

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DOI	10.1016/j.atmosenv.2020.117806
	Impact of a massive dust storm on the gross alpha; gross beta; 40K; 137Cs; 210Pb; 7Be activities measured in atmospheric aerosols collected in Tenerife; Canary Islands
	López-Pérez M.; Lorenzo-Salazar J.M.; Expósito F.J.; Díaz J.P.; Salazar P.
发表日期	2020
ISSN	13522310
卷号	239
英文摘要	From February 22 to 24, 2020, an intense dust storm affected the Spanish archipelago of the Canary Islands. Here we assess the radiological impact on the Canary Islands population of several natural and artificial radionuclides (40K, 137Cs, 210Pb, 7Be), and other radiological parameters (gross alpha and gross beta activity concentrations) measured in atmospheric aerosols before, during and after the dust storm. Total Suspended Matter highly correlated with PM10 (Pearson's correlation coefficient, ro = 0.98), showed increments ranging from 849% to 1778% against the background average levels, reaching levels of >3000 μg m−3. 40K and 137Cs radionuclides showed activity values over the minimum detection activity from January to March 2020, coupled with dust intrusion episodes during the study. This finding supports the use of these radionuclides as radiotracers for African low altitude dust intrusions occurring particularly during winter months over the Canary Islands. A high correlation between gross beta and 210Pb activities suggests that the latter is the main source for gross beta emitters in aerosol samples collected in the study region. 210Pb and 7Be showed a moderate positive correlation and did not show any significant change during the storm, suggesting a similar dynamics of alpha and beta emitters in the low atmosphere. A Principal Component Analysis of these observations showed two components representing a Saharan component (based on 40K, 137Cs, gross alpha, and PM10) and a heterogeneous component representing North Atlantic and Europe air masses (based on 7Be, 210Pb, and gross beta). In addition, a K-means cluster analysis helped to disentangle the origin of air masses arriving at the archipelago. Three different clusters were identified: a continental cluster (based on gross beta, 210Pb, and 7Be activity concentrations); an oceanic cluster (with low values of PM10 air concentrations, gross beta, gross alpha, and 210Pb, and 7Be and 40K activity concentrations), reflecting the Atlantic air contributions with lower radionuclide activity and microparticulate matter; and a dust intrusion cluster (with high PM10 values and 137Cs, 40K and gross alpha activity concentrations) representing dust intrusion episodes observed in Tenerife Island. These studies allow the detection and monitoring of radioactive elements, estimating the potential radiological risk to the population associated with mineral dust intrusions. © 2020 Elsevier Ltd
英文关键词	Aerosols; Atmospheric radionuclides; Back-trajectories; Dust storm; PM10
语种	英语
scopus关键词	Air quality; Atmospheric thermodynamics; Cluster analysis; Correlation methods; Dust; Intrusion detection; K-means clustering; Radioactive elements; Radioisotopes; Risk perception; Storms; Activity concentration; Gross alpha activities; Heterogeneous component; Natural and artificial radionuclides; Pearson's correlation coefficients; Positive correlations; Radionuclide activity; Total suspended matter; Atmospheric aerosols; beryllium 7; cesium 137; lead 210; potassium 40; tracer; air mass; cluster analysis; concentration (composition); correlation; dust storm; particulate matter; principal component analysis; radionuclide; air monitoring; air quality; air sampling; altitude; Article; atmospheric dispersion; Canary Islands; cluster analysis; correlation coefficient; dust storm; gross alpha activity; gross beta activity; health hazard; mineral dust; principal component analysis; priority journal; radiological parameters; suspended particulate matter; Atlantic Ocean; Atlantic Ocean (North); Canary Islands; Europe; Santa Cruz de Tenerife [(PRV) Canary Islands]; Spain; Tenerife
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144999
作者单位	Laboratorio de Física Médica y Radioactividad Ambiental, SEGAI, Universidad de La Laguna, Spain; Grupo de Observación de La Tierra y La Atmósfera, Universidad de La Laguna, Spain; Departamento de Medicina Física y Farmacología, Universidad de La Laguna, Spain
推荐引用方式 GB/T 7714	López-Pérez M.,Lorenzo-Salazar J.M.,Expósito F.J.,et al. Impact of a massive dust storm on the gross alpha; gross beta; 40K; 137Cs; 210Pb; 7Be activities measured in atmospheric aerosols collected in Tenerife; Canary Islands[J],2020,239.
APA	López-Pérez M.,Lorenzo-Salazar J.M.,Expósito F.J.,Díaz J.P.,&Salazar P..(2020).Impact of a massive dust storm on the gross alpha; gross beta; 40K; 137Cs; 210Pb; 7Be activities measured in atmospheric aerosols collected in Tenerife; Canary Islands.Atmospheric Environment,239.
MLA	López-Pérez M.,et al."Impact of a massive dust storm on the gross alpha; gross beta; 40K; 137Cs; 210Pb; 7Be activities measured in atmospheric aerosols collected in Tenerife; Canary Islands".Atmospheric Environment 239(2020).