"Measurements and models of GHGs and short-lived pollutants in the Baltimore/Washington area: Emissions and environmental justice"

Abstract: Greenhouse gases and associated pollutants (CO, NOx, VOCs, aerosols) are measured from a small airplane, mobile laboratory, and towers.  Through mass balance calculations and comparison to numerical models such as CMAQ-GHG  we estimate the total flux from the cities of Baltimore, MD and Washington, DC.  Emissions inventories were found to underestimate methane emissions substantially and have been improved.  Major sources include leakage in the natural gas delivery system and biogenic processes including landfills.  Measurements with high spatial and temporal resolution reveal hot spots of high concentrations often associated with pollutants such as black carbon (BC) and NO₂ that pose a health hazard in disadvantaged communities.