Pyrocumulonimbus affect average stratospheric aerosol composition

Pyrocumulonimbus (pyroCb) are wildfire-generated convective clouds that can inject smoke directly into the stratosphere. PyroCb have been tracked for years, yet their apparent rarity and episodic nature lead to highly uncertain climate impacts. In situ measurements of pyroCb smoke reveal its distinctive and exceptionally stable aerosol properties and define the long-term influence of pyroCb activity on the stratospheric aerosol budget. Analysis of 13 years of airborne observations shows that pyroCb are responsible for 10 to 25% of the black carbon and organic aerosols in the "present-day" lower stratosphere, with similar impacts in both the North and South Hemispheres. These results suggest that, should pyroCb increase in frequency and/or magnitude in future climates, they could generate dominant trends in stratospheric aerosol.

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Author Katich, J. M.
Apel, Eric C.
Bourgeois, I.
Brock, C. A.
Bui, T. P.
Campuzano-Jost, P.
Commane, R.
Daube, B.
Dollner, M.
Fromm, M.
Froyd, K. D.
Hills, Alan J.
Hornbrook, Rebecca
Jimenez, J. L.
Kupc, A.
Lamb, K. D.
McKain, K.
Moore, F.
Murphy, D. M.
Nault, B. A.
Peischl, J.
Perring, A. E.
Peterson, D. A.
Ray, E. A.
Rosenlof, K. H.
Ryerson, T.
Schill, G. P.
Schroder, J. C.
Weinzierl, B.
Thompson, C.
Williamson, C. J.
Wofsy, S. C.
Yu, P.
Schwarz, J. P.
Publisher UCAR/NCAR - Library
Publication Date 2023-02-24T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Resource Version N/A
Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:40:28.590471
Metadata Record Identifier edu.ucar.opensky::articles:26388
Metadata Language eng; USA
Suggested Citation Katich, J. M., Apel, Eric C., Bourgeois, I., Brock, C. A., Bui, T. P., Campuzano-Jost, P., Commane, R., Daube, B., Dollner, M., Fromm, M., Froyd, K. D., Hills, Alan J., Hornbrook, Rebecca, Jimenez, J. L., Kupc, A., Lamb, K. D., McKain, K., Moore, F., Murphy, D. M., Nault, B. A., Peischl, J., Perring, A. E., Peterson, D. A., Ray, E. A., Rosenlof, K. H., Ryerson, T., Schill, G. P., Schroder, J. C., Weinzierl, B., Thompson, C., Williamson, C. J., Wofsy, S. C., Yu, P., Schwarz, J. P.. (2023). Pyrocumulonimbus affect average stratospheric aerosol composition. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7qv3rh7. Accessed 23 July 2025.

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