Spatial patterns and temporal trends in mercury concentrations, precipitation depths, and mercury wet deposition in the North American Great Lakes region, 2002-2008
Environmental Pollution
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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.
Suggested Citation
Risch, M.R., Gay, D., Fowler, K.K., Keeler, G.J., Backus, S., Blanchard, P., Barres, J.A., Dvonch, J.T., 2012, Spatial patterns and temporal trends in mercury concentrations, precipitation depths, and mercury wet deposition in the North American Great Lakes region, 2002-2008: Environmental Pollution, v. 161, p. 261-271, https://doi.org/10.1016/j.envpol.2011.05.030.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Spatial patterns and temporal trends in mercury concentrations, precipitation depths, and mercury wet deposition in the North American Great Lakes region, 2002-2008 |
| Series title | Environmental Pollution |
| DOI | 10.1016/j.envpol.2011.05.030 |
| Volume | 161 |
| Year Published | 2012 |
| Language | English |
| Publisher | Elsevier |
| Publisher location | Amsterdam, Netherlands |
| Contributing office(s) | Indiana Water Science Center |
| Description | 11 p. |
| First page | 261 |
| Last page | 271 |
| Time Range Start | 2002-01-01 |
| Time Range End | 2008-12-31 |
| Country | United States |
| Other Geospatial | Great Lakes Region |