Anthropogenic Forcings on the Surficial Osmium Cycle

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Fältnamn	Indikatorer	Metadata
000		04052naa a2200493 4500
001		oai:DiVA.org:su-50294
003		SwePub
008		101222s2010 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
009		oai:research.chalmers.se:99a0d2cb-dafa-4cdf-bcb6-c49d77233deb
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-502942 URI
024	7	a https://doi.org/10.1021/es901887f2 DOI
024	7	a https://research.chalmers.se/publication/1116882 URI
040		a (SwePub)sud (SwePub)cth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Rauch, Sebastien,d 1971u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)sebr
245	1 0	a Anthropogenic Forcings on the Surficial Osmium Cycle
264		c 2009-12-09
264	1	b American Chemical Society (ACS),c 2010
338		a print2 rdacarrier
500		a authorCount :9
520		a Osmium is among the least abundant elements in the Earth's continental crust. Recent anthropogenic Os contamination of the environment from mining and smelting activities, automotive catalytic converter use, and hospital discharges has been documented. Here we present evidence for anthropogenic overprinting of the natural Os cycle using a ca. 7000-year record of atmospheric Os deposition and isotopic composition from an ombrotrophic peat bog in NW Spain. Preanthropogenic Os accumulation in this area is 0.10 +/- 0.04 ng m(-2) y(-1). The oldest strata showing human influence correspond to early metal mining and processing on the Iberian Peninsula (ca. 4700-2500 cal. BP). Elevated Os accumulation rates are found thereafter with a local maximum of 1.1 ng m(-2) y(-1) during the Roman occupation of the Iberian Peninsula (ca. 1930 cal. BP)and a further increase starting in 1750 AD with Os accumulation reaching 30 ng m(-2) y(-1) in the most recent samples. Osmium isotopic composition (Os-187/Os-188) indicates that recent elevated Os accumulation results from increased input of unradiogenic Os from industrial and automotive sources as well as from enhanced deposition of radiogenic Os through increased fossil fuel combustion and soil erosion. We posit that the rapid increase in catalyst-equipped vehicles, increased fossil fuel combustion, and changes in land-use make the changes observed in NW Spain globally relevant.
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskapx Miljövetenskap0 (SwePub)105022 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Environmental Sciences0 (SwePub)105022 hsv//eng
653		a NATURAL SCIENCES
653		a NATURVETENSKAP
700	1	a Peucker-Ehrenbrink, Bernhardu Woods Hole Oceanographic Institution4 aut
700	1	a Kylander, Malin E.u Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University4 aut0 (Swepub:su)mkyla
700	1	a Weiss, Dominik J.u The Natural History Museum, London,Imperial College of Science, Technology and Medicine4 aut
700	1	a Martinez-Cortizas, Antoniou Universidade de Santiagode Compostela4 aut
700	1	a Heslop, Davidu Universität Bremen4 aut
700	1	a Olid, Carolinau Universitat Autonoma de Barcelona (UAB)4 aut
700	1	a Mighall, Tim M.u University of Aberdeen4 aut
700	1	a Hemond, Harold F.u Massachusetts Institute of Technology (MIT)4 aut
710	2	a Chalmers tekniska högskolab Woods Hole Oceanographic Institution4 org
773	0	t Environmental Science and Technologyd : American Chemical Society (ACS)g 44:3, s. 881-887q 44:3<881-887x 0013-936Xx 1520-5851
856	4	u http://dx.doi.org/10.1021/es901887fy FULLTEXT
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-50294
856	4 8	u https://doi.org/10.1021/es901887f
856	4 8	u https://research.chalmers.se/publication/111688

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