Thursday, 10 January 2019: 8:45 AM
North 126A (Phoenix Convention Center - West and North Buildings)
Carbon monoxide, carbon dioxide and methane, the three most abundant carbon species, were measured by in situ methods on the NSF/NCAR C-130 aircraft during the Western wildfire Experiments for Cloud Chemistry, Absorbing Aerosol, and Nitrogen (WE-CAN) field campaign. Airborne observations of Western and Northwestern US fire plumes were undertaken from a base in Boise, ID during July and August, 2018. We will present preliminary carbon monoxide measurements, quantified by an Aerodyne mini-QCL (quantum cascade laser) direct absorbance spectrometer, and carbon dioxide and methane dry mole fractions quantified using a Picarro G2401-m wavelength scanned cavity ringdown spectrometer (WS-CRDS). Particle number concentrations of sizes greater than 100 nm were quantified by a wing-mounted Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) probe by Droplet Measurement Technologies.
Both CO and CO2 instruments are new offerings in the NSF/NCAR requestable measurements suite. We will present airborne measurement validation results, including laboratory environmental chamber and in-flight tests, as well as in-flight intercomparisons obtained in coordination with the relevant University of Wyoming King Air measurements during the Biomass Burning FLUX (BB-FLUX) experiment.
From WE-CAN and BB-FLUX observations, we will examine the distribution of primary emissions of major carbon species in wildfire smoke plumes produced under a variety of fire and environmental conditions. We will also explore the correlation of carbon monoxide and aerosol number concentration in the sampled smoke plumes.
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