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Abstract Title: Modeling of Global Hg Emission Contributions to Hg Air Concentrations at Some Canadian Monitoring Sites
Presenter Name: Deyong Wen
Company/Institution: Environment and Climate Change Canada
Session: Atmospheric Hg cycling: Source and Emissions
Day and Session: Wednesday 27th July - Session Four
Start Time: 16:00 UTC
Co-Authors: Deyong Wen,Alexandra Steffen,Geoff Stupple

Abstract Information :

Mercury (Hg) is a global pollutant. Its long-range atmospheric transport affects the regional or global distribution of airborne Hg as well as deposition to terrestrial and aquatic ecosystems. In this study, we used a modeling technique to estimate global Hg natural emissions/ reemissions and simulate global Hg contributions to some Canadian sites. The simulations were conducted with the Stochastic Time-Inverted Lagrangian Transport (STILT) model using global anthropogenic mercury emissions as well as estimated natural emissions and reemissions. In the simulations, 15-day back trajectories and the contributions of sources along them were calculated for every two hour. The model was run for 14 years from 2005 to 2018 and the results were compared to measured Hg air concentrations. Emission sources that contributed most to the sites were identified. Finally, the differences between the global emission contributions to each of the sites was investigated.

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