| Abstract: | Annual and weekly mercury (Hg) concentrations, precipitation depths, and Hg wet deposition in the Great Lakes region were analyzed by using data from 5 monitoring networks in the USA and Canada for a 2002-2008 study period. High-resolution maps of calculated annual data, 7-year mean data, and net interannual change for the study period were prepared to assess spatial patterns. Areas with 7-year mean annual Hg concentrations higher than the 12 ng per liter water-quality criterion were mapped in 4 states. Temporal trends in measured weekly data were determined statistically. Monitoring sites with significant 7-year trends in weekly Hg wet deposition were spatially separated and were not sites with trends in weekly Hg concentration. During 2002-2008, Hg wet deposition was found to be unchanged in the Great Lakes region and its subregions. Any small decreases in Hg concentration apparently were offset by increases in precipitation. |
| Genre: | Article |
| ProdID: | 70007094 |
| Citation Author: | Risch, Martin R.; Gay, David A.; Fowler, Kathleen K.; Keeler, Gerard J.; Backus, Sean M.; Blanchard, Pierrette ; Barres, James A.; Dvonch, J. Timothy |
| Citation Contributing Office: | Indiana Water Science Center |
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| Citation End Page: | 271 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Pollution |
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| Citation Phsyical Description: | 11 p. |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Spatial patterns and temporal trends in mercury concentrations, precipitation depths, and mercury wet deposition in the North American Great Lakes region, 2002-2008; 2012; Article; Journal; Environmental Pollution; Risch, Martin R.; Gay, David A.; Fowler, Kathleen K.; Keeler, Gerard J.; Backus, Sean M.; Blanchard, Pierrette ; Barres, James A.; Dvonch, J. Timothy |
| Citation Start Page: | 261 |
| Citation Volume: | 161 |
| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | Spatial patterns and temporal trends in mercury concentrations, precipitation depths, and mercury wet deposition in the North American Great Lakes region, 2002-2008; 2012; Article; Journal; Environmental Pollution; Risch, Martin R.; Gay, David A.; Fowler, Kathleen K.; Keeler, Gerard J.; Backus, Sean M.; Blanchard, Pierrette ; Barres, James A.; Dvonch, J. Timothy |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.envpol.2011.05.030 |
| Date Other: | Fri, 13 Jan 2012 00:00 -0600 |
| Publisher: | Elsevier |
