Pyrocumulonimbus affect average stratospheric aerosol composition

Autor(en)

J. M. Katich, E. C. Apel, I. Bourgeois, C. A. Brock, T. P. Bui, P. Campuzano-Jost, R. Commane, B. Daube, M. Dollner, M. Fromm, K. D. Froyd, A. J. Hills, R. S. Hornbrook, J. L. Jimenez, A. Kupc, K. D. Lamb, K. McKain, F. Moore, D. M. Murphy, B. A. Nault, J. Peischl, A. E. Perring, D. A. Peterson, E. A. Ray, K. H. Rosenlof, T. Ryerson, G. P. Schill, J. C. Schroder, B. Weinzierl, C. Thompson, C. J. Williamson, S. C. Wofsy, P. Yu, J. P. Schwarz

Abstrakt

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.

Organisation(en)

Aerosolphysik und Umweltphysik

Externe Organisation(en)

National Oceanic and Atmospheric Administration, University of Colorado, Boulder, National Center for Atmospheric Research (NCAR), National Aeronautics & Space Administration (NASA), U.S. Naval Research Laboratory, Aerodyne Res Inc, Colgate University, Colorado Department of Public Health and Environment, Jinan University, Columbia University in the City of New York, UCAR - University Corporation for Atmospheric Research, Harvard University

Journal

Science

Band

379

Seiten

815-820

Anzahl der Seiten

6

ISSN

0036-8075

DOI

https://doi.org/10.1126/science.add3101

Publikationsdatum

02-2023

Peer-reviewed

Ja

ÖFOS 2012

103039 Aerosolphysik, 103037 Umweltphysik

ASJC Scopus Sachgebiete

General

Sustainable Development Goals

SDG 13 – Maßnahmen zum Klimaschutz

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/12ddada9-3a1b-471e-86a5-1fc5ff97b0af