Investigating Carbonaceous Aerosol and Its Absorption Properties From Fires in the Western United States (WE‐CAN) and Southern Africa (ORACLES and CLARIFY) by Carter, Therese S, Heald, Colette L, Cappa, Christopher D, Kroll, Jesse H, Campos, Teresa L, Coe, Hugh, Cotterell, Michael I, Davies, Nicholas W, Farmer, Delphine K, Fox, Cathyrn, Garofalo, Lauren A, Hu, Lu, Langridge, Justin M, Levin, Ezra JT, Murphy, Shane M, Pokhrel, Rudra P, Shen, Yingjie, Szpek, Kate, Taylor, Jonathan W, Wu, Huihui

“…Our comparisons suggest that BC and/or BrC absorption is substantially higher downwind of Africa than in the western United States and, while the Saleh et al. (2014, https://doi.org/10.1038/ngeo2220) and FIREX parameterizations based on the BC:OA ratio improve model-observation agreement in some regions, they do not sufficiently differentiate absorption characteristics at short wavelengths. …”
Get full text

The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America by Berg, A. R., Heald, Colette L., Huff Hartz, K. E., Hallar, A. Gannet, Meddens, A. J. H., Hicke, J. A., Lamarque, Jean-Francois, Tilmes, S.

“…Over the last decade, extensive beetle outbreaks in western North America have destroyed over 100 000 km2 of forest throughout British Columbia and the western United States. Beetle infestations impact monoterpene emissions through both decreased emissions as trees are killed (mortality effect) and increased emissions in trees under attack (attack effect). …”
Get full text
Get full text

Estimation of Landscape Soil Water Losses from Satellite Observations of Soil Moisture by McColl, Kaighin A., Haghighi, Erfan, Salvucci, Guido D., Akbar, Ruzbeh, Gianotti, Daniel J, Entekhabi, Dara

“…An east-west divide in hydrologic regimes over CONUS is observed with large parts of the western United States exhibiting a strong water-limited evapotranspiration regime during most of the times. …”
Get full text
Get full text
Get full text

Secondary organic aerosol formation from the laboratory oxidation of biomass burning emissions by Lim, Christopher Yung-Ta, Hagan, David Henry, Coggon, Matthew M., Koss, Abigail R., Sekimoto, Kanako, de Gouw, Joost, Warneke, Carsten, Cappa, Christopher D., Kroll, Jesse

“…As part of the Fire Influence on Regional and Global Environments Experiment (FIREX 2016), we investigated the effect of photochemical aging on biomass burning organic aerosol (BBOA) with a focus on fuels from the western United States. Emissions were sampled into a small (150 L) environmental chamber and photochemically aged via the addition of ozone and irradiation by 254 nm light. …”
Get full text

OH chemistry of non-methane organic gases (NMOGs) emitted from laboratory and ambient biomass burning smoke: evaluating the influence of furans and oxygenated aromatics on ozone an... by Coggon, Matthew M., Lim, Christopher Yung-Ta, Koss, Abigail R., Sekimoto, Kanako, Yuan, Bin, Gilman, Jessica B., Hagan, David Henry, Selimovic, Vanessa, Zarzana, Kyle J., Brown, Steven S., Roberts, James M., Müller, Markus, Yokelson, Robert, Wisthaler, Armin, Krechmer, Jordan E., Jimenez, Jose L., Cappa, Christopher, Kroll, Jesse, de Gouw, Joost, Warneke, Carsten

“…Based on the decay of primary carbon measured by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS), it is confirmed that furans and oxygenated aromatics are among the NMOGs emitted from western United States fuel types with the highest reactivities towards OH. …”
Get full text

Biomass-burning-derived particles from a wide variety of fuels – Part 2: Effects of photochemical aging on particle optical and chemical properties by Cappa, Christopher D, Lim, Christopher Y, Hagan, David H, Coggon, Matthew, Koss, Abigail, Sekimoto, Kanako, de Gouw, Joost, Onasch, Timothy B, Warneke, Carsten, Kroll, Jesse H

“…We analyze the evolution of the optical properties and chemical composition of particles produced from combustion of a wide variety of biomass fuels, largely from the western United States. The smoke is photochemically aged in a reaction chamber over atmospheric-equivalent timescales ranging from 0.25 to 8 d. …”
Get full text