Baker, J. E.. University of Maryland, 410-326-7341
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DEPOSITION OF GASEOUS NITROGEN SPECIES AND ORGANIC
CONTAMINANTS FROM THE ATMOSPHERE TO THE CHESAPEAKE
Exchange of semi-volatile chemicals across the air-water interface is an important geochemical process in the shallow Chesapeake Bay. Since 1990, we have quantified loadings of persistent organic chemicals (PAHs, PCBs, pesticides) from the atmosphere directly to the surface waters of the bay, contributing to system-wide contaminant mass balances. More recently, concentrations and speciation of ammonia and nitric acid in the rural and urban Chesapeake atmospheres have been quantified. These data, combined with an atmospheric turbulence model, are used to make the first estimates of ammonia and nitric acid deposition directly to the surface waters of the Chesapeake Bay. These atmospheric nutrient loadings will be compared to previous estimates of other point and non-point nutrient sources.
Day: Wednesday, Feb. 3
Time: 10:30 - 10:45am
Location: Sweeney Center