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Your search keyword '"Wade Permar"' showing total 4 results
Start Over Author "Wade Permar" Publisher american geophysical union (agu)
4 results on '"Wade Permar"'

1. Emissions of Trace Organic Gases From Western U.S. Wildfires Based on WE‐CAN Aircraft Measurements

Author

Catherine Wielgasz, Ezra J. T. Levin, Qiaoyun Peng, Alan J. Hills, Brett B. Palm, Amy P. Sullivan, Wade Permar, Lu Hu, Vanessa Selimovic, Rebecca S. Hornbrook, Jeffrey L. Collett, Frank Flocke, Lauren A. Garofalo, Sonia M. Kreidenweis, Delphine K. Farmer, Emily V. Fischer, Barkley C. Sive, Joel A. Thornton, Yong Zhou, Robert J. Yokelson, Qian Wang, I-Ting Ku, Teresa Campos, Paul J. DeMott, and Eric C. Apel

Subjects
Trace (semiology), Atmospheric Science, Ptr tof ms, Geophysics, Space and Planetary Science, Organic gases, Environmental chemistry, Earth and Planetary Sciences (miscellaneous), Environmental science
Published
2021

2. Empirical Insights Into the Fate of Ammonia in Western U.S. Wildfire Smoke Plumes

Author

Qiaoyun Peng, Lu Hu, Joel A. Thornton, Catherine Wielgasz, Rebecca S. Hornbrook, Emily V. Fischer, Frank Flocke, Julieta F. Juncosa Calahorrano, Brett B. Palm, Ilana B. Pollack, Amy P. Sullivan, Alan J. Hills, Wade Permar, Jeffrey L. Collett, Jakob Lindaas, Lauren A. Garofalo, Delphine K. Farmer, Jeffrey R. Pierce, Andrew J. Weinheimer, Katelyn O'Dell, Geoffrey S. Tyndall, Sonia M. Kreidenweis, Denise D. Montzka, Teresa Campos, Matson A. Pothier, and Eric C. Apel

Subjects
Smoke, Atmospheric Science, Ammonia, chemistry.chemical_compound, Geophysics, chemistry, Reactive nitrogen, Space and Planetary Science, Environmental chemistry, Earth and Planetary Sciences (miscellaneous), Environmental science
Published
2021

3. Daytime Oxidized Reactive Nitrogen Partitioning in Western U.S. Wildfire Smoke Plumes

Author

Deedee Montzka, Kirk Ullmann, Brett B. Palm, Jeffrey R. Pierce, Delphine K. Farmer, Jeffrey L. Collett, Frank Flocke, Emily V. Fischer, Lauren A. Garofalo, Andrew J. Weinheimer, Teresa Campos, Rebecca S. Hornbrook, Julieta F. Juncosa Calahorrano, Lu Hu, Ilana B. Pollack, Jakob Lindaas, Qiaoyun Peng, Katelyn O'Dell, Joel A. Thornton, Samuel R. Hall, Alan J. Hills, Wade Permar, Matson A. Pothier, Eric C. Apel, and G. S. Tyndall

Subjects
Smoke, Atmospheric Science, Daytime, Geophysics, Reactive nitrogen, Space and Planetary Science, Environmental chemistry, Earth and Planetary Sciences (miscellaneous), Environmental science, Biomass burning
Published
2021

4. Emissions of Reactive Nitrogen From Western U.S. Wildfires During Summer 2018

Author

Jeffrey L. Collett, Andrew T. Hudak, Lauren A. Garofalo, Qiaoyun Peng, Lu Hu, Denise D. Montzka, Barkley C. Sive, Emily V. Fischer, Catherine Wielgasz, Andrew J. Weinheimer, Wade Permar, Sonia M. Kreidenweis, Delphine K. Farmer, Brett B. Palm, Jakob Lindaas, Joel A. Thornton, Frank Flocke, I-Ting Ku, Geoffrey S. Tyndall, Ilana B. Pollack, Yong Zhou, Matson A. Pothier, Teresa Campos, Amy P. Sullivan, Roger D. Ottmar, and Joseph C. Restaino

Subjects
Smoke, Atmospheric Science, Ozone, Volatilisation, 010504 meteorology & atmospheric sciences, Reactive nitrogen, chemistry.chemical_element, Combustion, Atmospheric sciences, 01 natural sciences, Nitrogen, chemistry.chemical_compound, Geophysics, Deposition (aerosol physics), chemistry, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Environmental science, NOx, 0105 earth and related environmental sciences
Abstract

Reactive nitrogen (Nr) within smoke plumes plays important roles in the production of ozone, the formation of secondary aerosols, and deposition of fixed N to ecosystems. The Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN) field campaign sampled smoke from 23 wildfires throughout the western U.S. during summer 2018 using the NSF/NCAR C-130 research aircraft. We empirically estimate Nr normalized excess mixing ratios and emission factors from fires sampled within 80 min of estimated emission and explore variability in the dominant forms of Nr between these fires. We find that reduced N compounds comprise a majority (39%-80%; median = 66%) of total measured reactive nitrogen (ΣNr) emissions. The smoke plumes sampled during WE-CAN feature rapid chemical transformations after emission. As a result, within minutes after emission total measured oxidized nitrogen (ΣNOy) and measured total ΣNHx (NH3 + pNH4) are more robustly correlated with modified combustion efficiency (MCE) than NOx and NH3 by themselves. The ratio of ΣNHx/ΣNOy displays a negative relationship with MCE, consistent with previous studies. A positive relationship with total measured ΣNr suggests that both burn conditions and fuel N content/volatilization differences contribute to the observed variability in the distribution of reduced and oxidized Nr. Additionally, we compare our in situ field estimates of Nr EFs to previous lab and field studies. For similar fuel types, we find ΣNHx EFs are of the same magnitude or larger than lab-based NH3 EF estimates, and ΣNOy EFs are smaller than lab NOx EFs.

Published
2021

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