Atmospheric Mercury Deposition at Selected NADP Sites 

Miranda Jackson1, Emmanuel Oleka2, Godfrey Uzochukwu3, Karen Skubal4 and Dennis Jackson5

National Atmospheric Deposition Program Sites measure mercury, base cations, acids, and nutients in precipitation samples. The focus of this preliminary investigation is on atmospheric mecury deposition at selected NADP sites at North Carolina A&T State University, (NC17); Lake Waccamaw State Park, (NC08); Savannah River Site, (SC03) and Congaree National State Park, (SC19). Site characteristics are as follows:

NC17: University Farm located near industrial and manufacturing operations
NC08: located near Lake Waccamaw
SC03: located near nuclear materials
SC19: located near old bottomland hardwoods

Total mercury (Hg) wet-deposition recorded at the same date and month at selected sites were compared to determine which site has the lowest and highest mercury wet-deposition. Precipitation samples were collected from each site every Tuesday of the week and sent to Mercury Analytical Laboratory for analysis. Results were uploaded to NADP data repository for public access. The lowest Hg wet-deposition was recorded in the month of January 2015 and ranges from 38.19 ng/m2 at SC 19 to 52.58ng/m2 at NC 08. The highest Hg wet-deposition was recorded in the month of April 2015 and ranges from 228.96 ng/m2 at NC 08 to 454.06 ng/m2 at NC 17. The variation in Hg wet-deposition appears to be seasonal. Data suggests that mercury deposition increases as the weather becomes warmer. This study adds to national scale measurements of atmospheric Hg deposition amounts, geographic distribution, and trends across Southeast United States and improves environmental quality.

Submitted for poster presentation at the 2016 Annual Meeting and Scientific Symposium of the National Atmospheric Deposition Program. October 31 – November 4, 2016, La Fonda on the Plaza, Santa Fe, NM.;


1North Carolina Agricultural and Technical State University,
2North Carolina Agricultural and Technical State University
3North Carolina Agricultural and Technical State University
4US Department of Energy
5Savannah River National Laboratory