Observed and modeled air and aqueous Hg for three summertime Northwest Atlantic ship cruisesa
aObservations are obtained from Soerensen et al. (2013). For the cruise in August 2008, we exclude aqueous mercury data measured in the coastal Gulf of Maine because they were affected by anomalously high freshwater inputs.
bThe units of air Hg0, Hgaq0, and HgaqT are ng m-3, fM (10-12 mol m-3), and pM (10-9 mol m-3), respectively.