Tree-Ring Inferred Atmospheric Mercury Concentrations in the Mackenzie Delta (NWT, Canada) Peaked in the 1970s but Are Increasing Once More

Mercury (Hg) is a global pollutant emitted to the atmosphere from anthropogenic sources, which have varied over time in response to increased industrialization and pollution control measures. Tree rings have shown promise for reconstructing past atmospheric Hg(0) concentrations to expand on the temporally and spatially limited data provided by the instrumental record, producing high-resolution data with absolutely dated chronologies. Here, we …