Atmospheric Chemistry Program Seminar: Seonsik Yun, CU-ANYL Chem 3rd year

Design and Characterization of the CU-Boulder Environmental Chamber Facility & Long-term and High-time-resolution Measurement for the Characterization of Aerosol Properties in the Denver Metropolitan Area
Seonsik Yun,
ANYL 3rd year, Jimenez group
"Environmental reaction chambers are essential tools for studying atmospheric chemistry and physics based on laboratory experiments. The design of chambers varies concerning the chamber sizes, temperature/humidity controls, light sources, air purification, and operating conditions to simulate atmospheric chemistry reactions and are often used to investigate secondary organic aerosol formation. Here we present a new state-of-the-art CU-Boulder environmental chamber facility and its design and characterizations.
The Atmospheric Science and Chemistry mEasurement NeTwork (ASCENT) is a new comprehensive, high-time-resolution, long-term measurement network in the U.S. to characterize aerosol chemical composition and physical properties. As one of 12 sites of the ASCENT, La Casa site is located near downtown Denver, Colorado, and will be equipped with a suite of advanced aerosol instrumentation: Aerosol Chemical Speciation Monitor (ACSM, non-refractory aerosols), Xact (trace metals), Aethalometer (black/brown carbon), and Scanning Mobility Particle Sizer (SMPS, aerosol number size distribution and concentration). Additional instrumentation, such as a Vocus Proton Transfer Reaction Time-of-Flight Mass Spectrometer (Vocus PTR-TOF, gas phase volatile organic compounds) and a radon detector (RAD7), will also be deployed to address a comprehensive data analysis on Denver urban aerosols. In this talk, I will present the preliminary results from the ASCENT instrumentation and future research opportunities."