气候变化领域集成服务门户(CCPortal): Environmental magnetic fingerprinting of anthropogenic and natural atmospheric deposition over southwestern Europe

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DOI	10.1016/j.atmosenv.2021.118568
	Environmental magnetic fingerprinting of anthropogenic and natural atmospheric deposition over southwestern Europe
	Larrasoaña J.C.; Pey J.; Zhao X.; Heslop D.; Mochales T.; Mata P.; Beamud E.; Reyes J.; Cerro J.C.; Pérez N.; Castillo S.
发表日期	2021
ISSN	1352-2310
卷号	261
英文摘要	Here we present an environmental magnetic study of atmospheric deposition collected by a multi-site network in Spain that covers fourteen locations representative of urban, industrial, agricultural, and natural environments across southwestern Europe. We have combined magnetic methods with scanning electron microscopy and geochemical data to characterize the magnetic mineral assemblages of particulate matter across different types of sites and phenomenological scenarios, and to unravel their environmental significance in terms of the most important anthropogenic and natural components of atmospheric deposition. Our results enable identification of two magnetite/maghemite components of anthropogenic origin, derived mostly from vehicular traffic, plus a hematite component associated with a baseline supply of north African dust, in all the studied sites regardless of their type. The ubiquitous presence of anthropogenic magnetite/maghemite particles in pristine natural environments, albeit in lower concentrations, point to their arrival from neighbouring urban areas through atmospheric mixing processes. Samples including particulate matter deposited during distinctively intense periods of north African dust supply are characterized by a fourth component, represented also by coarser-grained hematite, that is likely derived from a different source area within the Sahara Desert. The concomitant increase observed in these cases in the amounts of magnetite/maghemite particles suggests strongly that part of the magnetite/maghemite load attributed to anthropogenic sources for the rest of the phenomenological scenarios is aeolian in origin. This seems to explain the overall moderate correlation observed between magnetite/maghemite contents and proxies for vehicular traffic, and demonstrates the need for caution when interpreting environmental magnetic proxies for magnetite/maghemite abundances in terms of anthropogenic loads. This is especially the case in southern European cities where a steady supply of north African dust occurs throughout most of the year. Our results show a good correlation between hematite abundances and geochemical proxies for north African dust, which collectively delineate broad maxima during the summer and large peaks during distinctive dust breakouts. Thus, environmental magnetic proxies of hematite abundances can be used to monitor the contribution of natural sources to atmospheric deposition. © 2021 The Author(s)
关键词	Atmospheric deposition Environmental magnetism North African dust Particulate matter Pollution Spain
语种	英语
scopus关键词	Atmospheric chemistry; Deposition; Dust; Hematite; Magnetism; Pollution; Scanning electron microscopy; Urban growth; African dust; Anthropogenics; Atmospheric depositions; Environmental magnetism; Haematite; Maghemites; North african dust; Particulate Matter; Southwestern europe; Spain; Magnetite; ferric oxide; iron oxide; magnetite; anthropogenic effect; atmospheric deposition; maghemite; magnetic method; magnetite; mixing ratio; particulate matter; sampling; anthropology; Article; atmospheric deposition; atmospheric particulate matter; chemical fingerprinting; concentration (parameter); controlled study; environmental factor; Europe; hysteresis; magnetism; particulate matter; phenomenology; scanning electron microscopy; Europe; Varanidae
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/248320
作者单位	Instituto Geológico y Minero de España, C/Manuel Lasala 44, Zaragoza, 50006, Spain; Aragonese Foundation for Research & Development – ARAID, Av. de Ranillas 1-D, Zaragoza, 50018, Spain; Instituto Pirenaico de Ecología, CSIC, Av. Montañana 1005, Zaragoza, 50059, Spain; Research School of Earth Sciences, The Australian National University, Canberra, ACT 2601, Australia; Instituto Geológico y Minero de España, C/La Calera 1, Tres Cantos, 28760, Spain; Paleomagnetic Laboratory CCiTUB-Geo3Bcn, Geosciences Barcelona, CSIC, Barcelona, 08028, Spain; Universitat Illes Balears, Carretera de Valldemossa km7.4, Palma, 07122, Spain; Instituto de Diagnóstico Ambiental y Estudios del Agua, CSIC, C/Jordi Girona 18-26, Barcelona, 08028, Spain; Andalusian Institute for Earth System Research (IISTA-CEAMA), Universidad de Granada, Av. del Mediterráneo, Granada, 18071, Spain; Department of Applied Physics, Universidad de Granada, Av. de la Fuente Nueva, Granada, 18071, Spain
推荐引用方式 GB/T 7714	Larrasoaña J.C.,Pey J.,Zhao X.,et al. Environmental magnetic fingerprinting of anthropogenic and natural atmospheric deposition over southwestern Europe[J],2021,261.
APA	Larrasoaña J.C..,Pey J..,Zhao X..,Heslop D..,Mochales T..,...&Castillo S..(2021).Environmental magnetic fingerprinting of anthropogenic and natural atmospheric deposition over southwestern Europe.ATMOSPHERIC ENVIRONMENT,261.
MLA	Larrasoaña J.C.,et al."Environmental magnetic fingerprinting of anthropogenic and natural atmospheric deposition over southwestern Europe".ATMOSPHERIC ENVIRONMENT 261(2021).