TY - JOUR
T1 - Chemical evolution of an isolated power plant plume during the TexAQS 2000 study
AU - Springston, Stephen R.
AU - Kleinman, Lawrence I.
AU - Brechtel, Frederick
AU - Lee, Yin Nan
AU - Nunnermacker, Linda J.
AU - Wang, Jian
PY - 2005/6
Y1 - 2005/6
N2 - Stack emissions from a coal-burning power plant were measured during a research flight of the DOE G-1 during the Texas Air Quality Study (TexAQS 2000) on 10 September 2000. Clean upstream air and an isolated location allowed the plume to be unambiguously sampled during 12 successive downwind transects to a distance of 63 km - corresponding to a processing time of 4.6 h. The chemical transformation rates of sulfur and nitrogen primary pollutants into aerosol SO42- and HNO3 yield independent values of OH concentration (8.0 and 11×106 cm-3, respectively) that are consistent within experimental uncertainty and qualitatively agree with constrained steady-state (CSS) box model calculations. Ozone production efficiency increases with plume age as expected. Primary aerosol emissions with Dp>5 μm were sampled near the stack. As the plume ages, aerosol size distributions adjusted for dilution show constant number concentrations of aerosols Dp>10 nm and a marked increase in accumulation-mode particles (Dp>0.1 μm) as gas-to-particle-conversion causes smaller particles to grow.
AB - Stack emissions from a coal-burning power plant were measured during a research flight of the DOE G-1 during the Texas Air Quality Study (TexAQS 2000) on 10 September 2000. Clean upstream air and an isolated location allowed the plume to be unambiguously sampled during 12 successive downwind transects to a distance of 63 km - corresponding to a processing time of 4.6 h. The chemical transformation rates of sulfur and nitrogen primary pollutants into aerosol SO42- and HNO3 yield independent values of OH concentration (8.0 and 11×106 cm-3, respectively) that are consistent within experimental uncertainty and qualitatively agree with constrained steady-state (CSS) box model calculations. Ozone production efficiency increases with plume age as expected. Primary aerosol emissions with Dp>5 μm were sampled near the stack. As the plume ages, aerosol size distributions adjusted for dilution show constant number concentrations of aerosols Dp>10 nm and a marked increase in accumulation-mode particles (Dp>0.1 μm) as gas-to-particle-conversion causes smaller particles to grow.
KW - Aerosol growth
KW - Airborne measurements
KW - Power-plant plume
KW - Texas 2000 Air Quality Study
UR - https://www.scopus.com/pages/publications/20444462415
U2 - 10.1016/j.atmosenv.2005.01.060
DO - 10.1016/j.atmosenv.2005.01.060
M3 - Article
AN - SCOPUS:20444462415
SN - 1352-2310
VL - 39
SP - 3431
EP - 3443
JO - Atmospheric Environment
JF - Atmospheric Environment
IS - 19
ER -