TY - JOUR
T1 - Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol
AU - Decker, Zachary C.J.
AU - Novak, Gordon A.
AU - Aikin, Kenneth
AU - Veres, Patrick R.
AU - Neuman, J. Andrew
AU - Bourgeois, Ilann
AU - Bui, T. Paul
AU - Campuzano-Jost, Pedro
AU - Coggon, Matthew M.
AU - Day, Douglas A.
AU - DiGangi, Joshua P.
AU - Diskin, Glenn S.
AU - Dollner, Maximilian
AU - Franchin, Alessandro
AU - Fredrickson, Carley D.
AU - Froyd, Karl D.
AU - Gkatzelis, Georgios I.
AU - Guo, Hongyu
AU - Hall, Samuel R.
AU - Halliday, Hannah
AU - Hayden, Katherine
AU - Holmes, Christopher D.
AU - Jimenez, Jose L.
AU - Kupc, Agnieszka
AU - Lindaas, Jakob
AU - Middlebrook, Ann M.
AU - Moore, Richard H.
AU - Nault, Benjamin A.
AU - Nowak, John B.
AU - Pagonis, Demetrios
AU - Palm, Brett B.
AU - Peischl, Jeff
AU - Piel, Felix M.
AU - Rickly, Pamela S.
AU - Robinson, Michael A.
AU - Rollins, Andrew W.
AU - Ryerson, Thomas B.
AU - Schill, Gregory P.
AU - Sekimoto, Kanako
AU - Thompson, Chelsea R.
AU - Thornhill, Kenneth L.
AU - Thornton, Joel A.
AU - Ullmann, Kirk
AU - Warneke, Carsten
AU - Washenfelder, Rebecca A.
AU - Weinzierl, Bernadett
AU - Wiggins, Elizabeth B.
AU - Williamson, Christina J.
AU - Winstead, Edward L.
AU - Wisthaler, Armin
AU - Womack, Caroline C.
AU - Brown, Steven S.
N1 - Publisher Copyright:
© 2024 His Majesty the King in Right of Canada and The Authors. Reproduced with the permission of the Minister of Environment and Climate Change Canada. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
PY - 2024/2/28
Y1 - 2024/2/28
N2 - Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme Pyrocumulonimbus (PyroCB) events. We report field-derived N2O5 uptake coefficients, γ(N2O5), and ClNO2 yields, φ(ClNO2), from two aircraft campaigns observing fresh smoke in the lower and mid troposphere and processed/aged smoke in the upper troposphere and lower stratosphere (UTLS). Derived φ(ClNO2) varied across the full 0–1 range but was typically <0.5 and smallest in a PyroCB (<0.05). Derived γ(N2O5) was low in agricultural smoke (0.2–3.6 × 10−3), extremely low in mid-tropospheric wildfire smoke (0.1 × 10−3), but larger in PyroCB processed smoke (0.7–5.0 × 10−3). Aged biomass burning aerosol in the UTLS had a higher γ(N2O5) of 17 × 10−3 that increased with sulfate and liquid water, but that was 1–2 orders of magnitude lower than values for aqueous sulfuric aerosol used in stratospheric models.
AB - Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme Pyrocumulonimbus (PyroCB) events. We report field-derived N2O5 uptake coefficients, γ(N2O5), and ClNO2 yields, φ(ClNO2), from two aircraft campaigns observing fresh smoke in the lower and mid troposphere and processed/aged smoke in the upper troposphere and lower stratosphere (UTLS). Derived φ(ClNO2) varied across the full 0–1 range but was typically <0.5 and smallest in a PyroCB (<0.05). Derived γ(N2O5) was low in agricultural smoke (0.2–3.6 × 10−3), extremely low in mid-tropospheric wildfire smoke (0.1 × 10−3), but larger in PyroCB processed smoke (0.7–5.0 × 10−3). Aged biomass burning aerosol in the UTLS had a higher γ(N2O5) of 17 × 10−3 that increased with sulfate and liquid water, but that was 1–2 orders of magnitude lower than values for aqueous sulfuric aerosol used in stratospheric models.
KW - ClNO
KW - NO
KW - UTLS
KW - biomass burning
KW - chloride
KW - heterogeneous chemistry
UR - https://www.scopus.com/pages/publications/85185303839
U2 - 10.1029/2023GL107273
DO - 10.1029/2023GL107273
M3 - Article
AN - SCOPUS:85185303839
SN - 0094-8276
VL - 51
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 4
M1 - e2023GL107273
ER -