Overview of Plume Transects during BBOP Flights
Authors
Larry Kleinman — Brookhaven National Laboratory
Arthur J Sedlacek — Brookhaven National Laboratory
Ernie R. Lewis — Brookhaven National Laboratory
Stephen R. Springston — Brookhaven National Laboratory
Jian Wang — Washington University in St. Louis
Timothy B Onasch — Aerodyne Research
Manvendra K. Dubey — Los Alamos National Laboratory
Duli Chand — Pacific Northwest National Laboratory
Jennifer M. Comstock — Pacific Northwest National Laboratory
John Hubbe — Pacific Northwest National Laboratory
Fan Mei — Pacific Northwest National Laboratory
Mikhail S. Pekour — Pacific Northwest National Laboratory
John E Shilling — Pacific Northwest National Laboratory
Jason Tomlinson — Pacific Northwest National Laboratory
Sonya Miranda — University of CA, Davis
Qi Zhang — University of California, Davis
Shan Zhou — University of California, Davis
Robert James Yokelson — University of Montana
Nicole Briggs — Gradient Corp
Category
Absorbing Aerosol
Description
During the Biomass Burn Observation Project (BBOP), between July and October, 2013, the DOE G-1 aircraft was used to sample aerosols and trace gasses from wildland fires in the Pacific Northwest and prescribed agricultural burns in the lower Mississippi River Valley. Regional pollution and urban sources were sampled for contrast. Collaborative measurements were made with the surface site at Mount Bachelor Observatory and with NASA aircraft from the SEAC4RS program. We have parsed the G-1 data set into plume transects. Enhancements relative to background are calculated for chemical concentrations and microphysical quantities. For near source transects, ratios relative to a conservative tracer such as CO yield approximate emission ratios. Chemical and microphysical interactions result in changes downwind. The downwind evolution of aerosol mixing state and soot coating parameters are described in a companion poster by Sedlacek et al. Here we focus on chemical changes and associated changes in particle size and light scattering. We examine photochemical age and modified combustion efficiency for correlations with other ratios. Back of the envelope calculations of chemical conversion rates, condensation, and coagulation are a prelude to detailed Lagrangian modeling.Lead PI
Larry Kleinman — Brookhaven National Laboratory