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Atmospheric Deposition Modeling the Chesapeake Bay Watershed
Citation:
Benish, S., J. Bash, K. Foley, S. Napelenok, C. Hogrefe, Keith Appel, L. Linker, G. Shenk, AND G. Bhatt. Atmospheric Deposition Modeling the Chesapeake Bay Watershed. Chesapeake Bay October Modeling Workgroup Quarterly Meeting, Virtual, Virtual, October 05 - 06, 2021.
Impact/Purpose:
Using CMAQv5.3.2 simulations from EPA’s Air QUAlity TimE Series (EQUATES) project, we assess trends in total inorganic nitrogen and sulfur wet and dry deposition from 2002 to 2017. Special attention will be placed on the Chesapeake watershed and tidal Bay, a region that receives about a third of its annual nitrogen load from atmospheric deposition. By precipitation and bias adjusting the wet deposition fields, we demonstrate improvements in measurement-model agreement. The Integrated Source Apportionment Method (ISAM) in CMAQ will be used to quantify the contribution from emissions and source regions to nutrient loading within the Chesapeake Bay Watershed.
Description:
Using CMAQv5.3.2 simulations from EPA’s Air QUAlity TimE Series (EQUATES) project, we assess trends in total inorganic nitrogen and sulfur wet and dry deposition from 2002 to 2017. Special attention will be placed on the Chesapeake watershed and tidal Bay, a region that receives about a third of its annual nitrogen load from atmospheric deposition. By precipitation and bias adjusting the wet deposition fields, we demonstrate improvements in measurement-model agreement. The Integrated Source Apportionment Method (ISAM) in CMAQ will be used to quantify the contribution from emissions and source regions to nutrient loading within the Chesapeake Bay Watershed.