AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Speciated Aerosol Emission Factors and AMS Mass-Spectral Profiles of South Asian Combustion Sources
J. DOUG GOETZ, Michael Giordano, Chelsea Stockwell, Ted Christian, Rashmi Maharjan, Sagar Adhikari, Prakash Bhave, P.S. Praveen, Arnico Panday, Thilina Jayarathne, Elizabeth Stone, Robert J. Yokelson, Peter DeCarlo, Drexel University
Abstract Number: 454 Working Group: Combustion
Abstract Characterization of aerosol emissions from prevalent but under sampled combustion sources in South Asia was performed as part of the Nepal Ambient Monitoring and Source Testing Experiment (NAMaSTE) in April 2015. NAMaSTE source sampling took place in and around the Kathmandu Valley and in the Indo-Gangetic plains of southern Nepal. Targeted emission sources included cooking stoves with a variety of solid fuels, brick kilns, garbage burning, crop-residue burning, diesel irrigation pumps, and motorcycles. Real-time measurements of submicron non-refractory aerosol mass concentration and composition were obtained using an Aerodyne mini Aerosol Mass Spectrometer (mAMS). Black carbon and brown carbon contributions were measured using a 6-channel dual spot aethalometer (Magee Scientific AE-33) and a 2 wavelength PAX System (Droplet Measurment Technology). Emission factors (PM1.0 per mass of fuel burned) were calculated for all aerosol species and for each source type based on simultaneous CO2 measurements made using a Picarro cavity ring-down spectrometer (CRDS G2401). Time-integrated unit mass resolution (UMR) mass spectral profiles were retrieved for individual emission sources and burn-phase-specific mass spectra were retrieved for several sources. The mass spectral data were used to make comparisons between the various sample source types and fuels. Additionally, analysis of organic UMR ions to total organic (f44, f43, f60, etc.) are examined as primary emissions in f44 vs f43 and f44 vs f60 space. Characterizing the mass spectral signatures and aerosol emission factors of the tested emission sources is key to understanding the contribution of these sources to ambient air pollution burdens in rural and urban areas in South Asia and is important for air quality management in the region.