| Abstract: | Atmospheric deposition of Hg is the predominant pathway for Hg to reach sensitive ecosystems, but the importance of emissions on near-field deposition remains unclear. To better understand spatial variability in Hg deposition, mercury concentrations were analyzed in sediment cores from 12 lakes with undeveloped watersheds near to (<50 km) and remote from (>150 km) several major urban areas in the United States. Background and focusing corrected Hg fluxes and flux ratios (modern to background) in the near-urban lakes (68 ?? 6.9 ??g m -2 yr -1 and 9.8 ?? 4.8, respectively) greatly exceed those in the remote lakes (14 ?? 9.3 ??g m -2 yr -1 and 3.5 ?? 1.0) and the fluxes are strongly related to distance from the nearest major urban area (r 2 = 0.87) and to population and Hg emissions within 50-100 km of the lakes. Comparison to monitored wet deposition suggests that dry deposition is a major contributor of Hg to lakes near major urban areas. ?? 2011 Elsevier Ltd. All rights reserved. |
| Genre: | Article |
| ProdID: | 70032691 |
| Citation Author: | Van Metre, P. C. |
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| Citation End Page: | 215 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Pollution |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Increased atmospheric deposition of mercury in reference lakes near major urban areas; 2012; Article; Journal; Environmental Pollution; Van Metre, P. C. |
| Citation Start Page: | 209 |
| Citation Volume: | 162 |
| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | Increased atmospheric deposition of mercury in reference lakes near major urban areas; 2012; Article; Journal; Environmental Pollution; Van Metre, P. C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.envpol.2011.11.003 |
| Date Other: | Sun, 1 Jan 2012 00:00 -0600 |
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