Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol

Autor(en)

, Zachary C. J. Decker, Gordon A. Novak, Kenneth Aikin, Patrick R. Veres, J. Andrew Neuman, Ilann Bourgeois, T. Paul Bui, Pedro Campuzano-Jost, Matthew M. Coggon, Douglas A. Day, Joshua P. DiGangi, Glenn S. Diskin, Maximilian Dollner, Alessandro Franchin, Carley D. Fredrickson, Karl D. Froyd, Georgios I. Gkatzelis, Hongyu Guo, Samuel R. Hall, Hannah Halliday, Katherine Hayden, Christopher D. Holmes, Jose L. Jimenez, Agnieszka Kupc, Jakob Lindaas, Ann M. Middlebrook, Richard H. Moore, Benjamin A. Nault, John B. Nowak, Demetrios Pagonis, Brett B. Palm, Jeff Peischl, Felix M. Piel, Pamela S. Rickly, Michael A. Robinson, Andrew W. Rollins, Thomas B. Ryerson, Gregory P. Schill, Kanako Sekimoto, Chelsea R. Thompson, Kenneth L. Thornhill, Joel A. Thornton, Kirk Ullmann, Carsten Warneke, Rebecca A. Washenfelder, Bernadett Weinzierl, Elizabeth B. Wiggins, Christina J. Williamson, Edward L. Winstead, Armin Wisthaler, Caroline C. Womack, Steven S. Brown

Abstrakt

Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme Pyrocumulonimbus (PyroCB) events. We report field-derived N

₂O

₅ uptake coefficients, γ(N

₂O

₅), and ClNO

₂ yields, φ(ClNO

₂), 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(ClNO

₂) varied across the full 0–1 range but was typically <0.5 and smallest in a PyroCB (<0.05). Derived γ(N

₂O

₅) 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(N

₂O

₅) 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.

Organisation(en)

Aerosolphysik und Umweltphysik

Externe Organisation(en)

National Oceanic and Atmospheric Administration, University of Colorado, Boulder, University of Cambridge, NOAA Chemical Sciences Laboratory, Paul Scherrer Institute, National Center for Atmospheric Research (NCAR), Université Savoie-Mont-Blanc, NASA Ames Research Center, NASA Langley Research Center, University of Washington, Forschungszentrum Jülich, Leopold-Franzens-Universität Innsbruck, University of Oslo, Science Systems and Applications, Inc., Finnish Meteorological Institute, University of Helsinki, Environment and Climate Change Canada, Florida State University, Colorado State University, Aerodyne Res Inc, Weber State University, Colorado Department of Public Health and Environment, Yokohama City University (YCU)

Journal

Geophysical Research Letters

Band

51

Anzahl der Seiten

10

ISSN

0094-8276

DOI

https://doi.org/10.1029/2023GL107273

Publikationsdatum

02-2024

Peer-reviewed

Ja

ÖFOS 2012

103037 Umweltphysik, 103039 Aerosolphysik, 105206 Meteorologie, 105208 Atmosphärenchemie

Schlagwörter

ASJC Scopus Sachgebiete

Geophysics, Allgemeine Erdkunde und Planetologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f97f9710-382c-49e0-816d-1f1e626041d0