Coherent Identifier About this item: 20.500.12592/1wcrcw

3. Changes in Arctic mercury levels: emissions sources, pathways and accumulation

26 May 2022

Summary

Mercury emissions in the Arctic region (north of 60°N) sources; The majority of the anthropogenic Hg emissions in the Arctic values calculated from the spatially distributed inventory of anthropogenic region occur in Russia and are associated with relatively few emissions to air in 2015 (see Section 3.2.2.2). [...] Modeling estimates of combined geogenic processes in the Arctic and legacy Hg emissions from soils and vegetation are in the Anthropogenic and legacy Hg emissions in global regions are range of 6.5 to 59.1 Mg/y (median of 24 Mg/y) north of 60°N important sources of Hg input into the Arctic, transported in the Arctic (based on the four Hg models used in this report; there via the atmosphere or ocea. [...] Another important source of Hg in the Arctic is to the sparse population and limited human activities in the the release of Hg from biomass burning as a result of wildfires, Arctic, natural emissions within the Arctic, including geogenic which is described in the next section (Section 3.2.3.1). [...] and dimethylmercury; DMHg); the models also simulate the Sources of uncertainty include the magnitude of the benthic partitioning of Hg(II) and MMHg onto particulate organic sediment resuspension for coastal regions, the magnitude of carbon (POC) to form particle-bound HgP and MMHgP, terrestrial influence on river discharges to the Arctic, and how and the sinking of HgP and MMHgP to deeper waters. [...] seasonal amplitude at Alert due to the underestimation of The negative phase of the NAO (NOAA, 2020) might have the amplitude of both the spring minimum and summer increased the transport of Hg from North America to the maximum Hg(0) concentrations (Figure 3.8).

Pages
60
AMAP
Arctic Monitoring And Assessment Programme