Aerosol size distribution changes in FIREX-AQ biomass burning plumes: the impact of plume concentration on coagulation and OA condensation/evaporation by N. A. June, A. L. Hodshire, E. B. Wiggins, E. L. Winstead, E. L. Winstead, C. E. Robinson, C. E. Robinson, K. L. Thornhill, K. L. Thornhill, K. J. Sanchez, R. H. Moore, D. Pagonis, D. Pagonis, D. Pagonis, H. Guo, P. Campuzano-Jost, J. L. Jimenez, J. L. Jimenez, M. M. Coggon, M. M. Coggon, J. M. Dean-Day, T. P. Bui, J. Peischl, J. Peischl, R. J. Yokelson, M. J. Alvarado, S. M. Kreidenwis, S. H. Jathar, J. R. Pierce

“…Observations of OA and <span class="inline-formula">O:C</span> suggest that evaporation and/or secondary OA formation was greater in less concentrated smoke prior to the first measurement (5–57 min after emission). …”
Get full text

Linking gas, particulate, and toxic endpoints to air emissions in the Community Regional Atmospheric Chemistry Multiphase Mechanism (CRACMM) by H. O. T. Pye, B. K. Place, B. N. Murphy, K. M. Seltzer, K. M. Seltzer, E. L. D'Ambro, C. Allen, I. R. Piletic, S. Farrell, R. H. Schwantes, M. M. Coggon, E. Saunders, L. Xu, L. Xu, G. Sarwar, W. T. Hutzell, K. M. Foley, G. Pouliot, J. Bash, W. R. Stockwell

“…Autoxidation, a gas-phase reaction particularly effective in producing SOA, was added for C<span class="inline-formula">₁₀</span> and larger alkanes, aromatic hydrocarbons, sesquiterpenes, and monoterpene systems including second-generation aldehydes. …”
Get full text

Constraining emissions of volatile organic compounds from western US wildfires with WE-CAN and FIREX-AQ airborne observations by L. Jin, W. Permar, V. Selimovic, V. Selimovic, D. Ketcherside, R. J. Yokelson, R. S. Hornbrook, E. C. Apel, I.-T. Ku, J. L. Collett Jr., A. P. Sullivan, D. A. Jaffe, D. A. Jaffe, J. R. Pierce, A. Fried, M. M. Coggon, G. I. Gkatzelis, G. I. Gkatzelis, G. I. Gkatzelis, C. Warneke, E. V. Fischer, L. Hu

“…Considering both uncertainties in effective dry matter burned (<span class="inline-formula">×</span> 3) and unmodeled VOCs (<span class="inline-formula">×</span> 2), we infer that BB contributed to 10 % in 2019 and 45 % in 2018 (240 and 2040 <span class="inline-formula">Gg C</span>) of the total VOC primary emission flux in the western USA during these two fire seasons, compared to only 1 %–10 % in the standard GEOS-Chem.…”
Get full text

Identifying and correcting interferences to PTR-ToF-MS measurements of isoprene and other urban volatile organic compounds by M. M. Coggon, C. E. Stockwell, C. E. Stockwell, M. S. Claflin, E. Y. Pfannerstill, L. Xu, L. Xu, L. Xu, J. B. Gilman, J. Marcantonio, C. Cao, K. Bates, K. Bates, G. I. Gkatzelis, A. Lamplugh, E. F. Katz, E. F. Katz, C. Arata, E. C. Apel, R. S. Hornbrook, F. Piel, F. Piel, F. Piel, F. Majluf, F. Majluf, D. R. Blake, A. Wisthaler, A. Wisthaler, M. Canagaratna, B. M. Lerner, A. H. Goldstein, A. H. Goldstein, J. E. Mak, C. Warneke

“…This study evaluates the extent to which fragmentation and other ionization processes impact urban measurements of the PTR-ToF-MS ions typically assigned to isoprene (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mi>m</mi><mo>/</mo><mi>z</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="23pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="91270dba487782af7360c80516416e4b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-17-801-2024-ie00001.svg" width="23pt" height="14pt" src="amt-17-801-2024-ie00001.png"/></svg:svg></span></span> 69, C<span class="inline-formula">₅</span>H<span class="inline-formula">₈</span>H<span class="inline-formula">⁺</span>), acetaldehyde (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mi>m</mi><mo>/</mo><mi>z</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="23pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="46f32566b65c77f385ccc58250dc589d"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-17-801-2024-ie00002.svg" width="23pt" height="14pt" src="amt-17-801-2024-ie00002.png"/></svg:svg></span></span> 45, CH<span class="inline-formula">₃</span>CHO<span class="inline-formula">⁺</span>), and benzene (<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow><mi>m</mi><mo>/</mo><mi>z</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="23pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="d93d3cda2a0fb8602765a5ab31f8bec1"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-17-801-2024-ie00003.svg" width="23pt" height="14pt" src="amt-17-801-2024-ie00003.png"/></svg:svg></span></span> 79, C<span class="inline-formula">₆</span>H<span class="inline-formula">₆</span>H<span class="inline-formula">⁺</span>). …”
Get full text