Supplementary Information: Understanding factors influencing the detection of mercury policies in modelled Laurentian Great Lakes wet deposition Amanda Giang Shaojie Song Marilena Muntean Greet Janssens-Maenhout Abigail Harvey Elizabeth Berg Noelle E. Selin Contents S1 Additional emissions information S2 S2 Model-Observation Comparison S8 S3 Additional wet deposition results S9 S4 Emissions Inventory Comparison S13 List of Figures S1 Emissions trends in the US and Canada. ............................ S2 S2 Emissions Summary NA .................................... S3 S3 Emissions Summary ROW ................................... S4 S4 Cumulative distribution functions of removal fraction and fraction Hg(0) for different air pollution control configurations at the individual plant level, using data from Bullock and Johnson [1]............................................ S7 S5 Emissions changes due to policy ................................. S7 S6 Model-observation comparison of monthly time series 2005-2012............... S8 S7 Model-observation comparison of 8 year trend (2005-2012) in wet deposition......... S9 S8 Model-observation comparison of monthly mean surface gaseous elemental mercury con- centrations. ........................................... S9 S9 Change in precipitation weighted concentration (%) between pre-policy and post-policy pe- riod in Policy Only simulation.................................. S9 S10 Change in precipitation weighted concentration (%) between pre-policy and post-policy pe- riod in Energy and Economic Trends simulation. ....................... S10 S11 Change in wet deposition (%) between pre-policy and post-policy period in Product Emis- sions Trend simulation...................................... S10 S12 Change in precipitation weighted concentration (%) between pre-policy and post-policy pe- riod in Product Emissions Trends simulation. ......................... S10 S13 Change in precipitation weighted concentration (%) between pre-policy and post-policy pe- riod in Removal Variability simulation.............................. S11 S1 Electronic Supplementary Material (ESI) for Environmental Science: Processes & Impacts. This journal is © The Royal Society of Chemistry 2018