Isotopic source signatures for atmospheric lead: The Northern Hemisphere

Citation
A. Bollhofer et Kjr. Rosman, Isotopic source signatures for atmospheric lead: The Northern Hemisphere, GEOCH COS A, 65(11), 2001, pp. 1727-1740
Citations number
44
Categorie Soggetti
Earth Sciences
Journal title
GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN journal
00167037 → ACNP
Volume
65
Issue
11
Year of publication
2001
Pages
1727 - 1740
Database
ISI
SICI code
0016-7037(200106)65:11<1727:ISSFAL>2.0.ZU;2-J
Abstract
Aerosols collected between 1994 and 1999 at more than 80 different sites af fecting the atmospheric composition of the Northern Hemisphere have been me asured for their Pb-206/Pb-207, Pb-208/Pb-207 and Pb-206/Pb-204 ratios and Pb concentrations. The ratios are potentially useful for tracing sources of pollution and the movement of air-masses on a global scale. A change in is otopic composition compared to earlier measurements could be detected in th e Western United States and parts of Europe, most probably due to long rang e transport of Pb pollution from China and Russia, respectively, and an inc reasing relative contribution of industrial Pb. The geographical variations found in the Pb isotopic composition of the aerosols made it possible to b roadly characterize different regions via the Pb-206/Pb-207 (Pb-208/Pb-207) isotope ratios of the aerosols sampled: Eastern United States 1.173-1.231 (2.438-2.470); Western United States 1.159-1.188 (2.326-2.455); Canada 1.09 4-1.177 (1-.365-2.438); Mexico 1.188-1.197 (2.452-2.463); Japan 1.153-1.162 (2.435-2.443): China 1.141-1.177 (2.435-2.465): Germany 1.133-1.165 (2.405 -2.440); Spain & France 1.097-1.142 (2.372-2.410); Northern Italy 1.148-1.1 60(2.419-2.430); Southern Italy 1.108-1.121(2.376-2.387); Eastern Europe an d Russia 1.112-1.164 (2.388-2.446); North Africa & Arabian Peninsula 1.096- 1.153 (2.361-2.431). Copyright (C) 2001 Elsevier Science Ltd.