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Recent studies demonstrate a short 3–6-month atmospheric lifetime for mercury (Hg). This implies Hg emissions are predominantly deposited within the same hemisphere in which they are emitted, thus placing increasing importance on considering Hg sources, sinks and impacts from a hemispheric perspective. In the absence of comprehensive Hg data from the Southern Hemisphere (SH), estimates and inventories for the SH have been drawn from data collected in the NH, with the assumption that the NH data are broadly applicable. In this paper, we centre the uniqueness of the SH in the context of natura...

3-D Models of High Concentrations of As and Mn in Glacial Aquifer Groundwater Geology Plays a Key Role in Glacial Aquifer System Groundwater Quality Machine-learning models predict where concentrations of these drinking-water contaminants likely to be high Learn More Release Date: April 27, 2021 New 3-dimensional models predict where high concentrations of arsenic and manganese are likely to occur in the glacial aquifer system, reports a new study from the U.S. Geological Survey National Water Quality Program. The glacial aquifer system, which underl...