Relative contributions of different source categories to Great Lakes mercury deposition during the 2005 simulation year are shown. The multi-colored bars, scaled with the left-hand axis, show the fraction of the model-estimated deposition arising from each category. The total, model-estimated deposition amounts for each model configuration and for each lake are shown with the white circles, and scaled to the right-hand axis. The contributions shown for specific countries (United States, Canada, China, Russia, India, and Mexico) include only the contributions from direct, anthropogenic emissions and do not include contributions arising from re-emissions of previously deposited material from terrestrial or oceanic surfaces. All deposition amounts and fractions represent gross, one-way deposition amounts. The Great Lakes summary values shown (bottom right hand panel) are based on an area-weighted average of individual-lake results.