Importance of Gaseous Elemental Mercury Fluxes in Western Maryland
AbstractThe purpose of this study was to increase our understanding of the gaseous elemental mercury (GEM, Hg°) fluxes between the atmosphere and soils. Moreover, we wanted to quantify the annual GEM flux, identify the controls, and compare the GEM flux to annual rates of gaseous oxidized mercury (GOM) dry deposition and wet deposition of total mercury. We measured GEM fluxes using the modified Bowen ratio (MBR) technique from 6 July 2009 to 6 July 2010 in western Maryland. The annual hourly mean (±std. dev.) GEM flux was −0.63 ± 31.0 ng·m−2·h−1. Hourly mean GEM fluxes were not strongly correlated with atmospheric trace gases, aerosols, or meteorology. However, hourly mean GEM emissions (15.3 ± 27.9 ng·m−2·h−1) and deposition (−14.6 ± 26.6 ng·m−2·h−1) were correlated with ultraviolet-B radiation (UV-B), wind speed (WS), ozone (O3), and relative humidity (RH). The annual net GEM flux was −3.33 µg· m−2·year−1 and was similar to the annual dry deposition rate of GOM (2.5 to 3.2 µg·m−2·year−1), and 40% less than the annual mean wet deposition (8 µg·m−2·year−1) of total mercury. Thus, dry deposition of GEM accounted for approximately 25% of the total annual mercury deposition (~14 ug·m−2·year−1) measured at our study site. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Castro, M.S.; Moore, C.W. Importance of Gaseous Elemental Mercury Fluxes in Western Maryland. Atmosphere 2016, 7, 110.
Castro MS, Moore CW. Importance of Gaseous Elemental Mercury Fluxes in Western Maryland. Atmosphere. 2016; 7(9):110.Chicago/Turabian Style
Castro, Mark S.; Moore, Christopher W. 2016. "Importance of Gaseous Elemental Mercury Fluxes in Western Maryland." Atmosphere 7, no. 9: 110.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.