On the stratospheric chemistry of midlatitude wildfire smoke.

Autor: Solomon S; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139., Dube K; Institute for Space and Atmospheric Science, University of Saskatchewan, Saskatoon, SK, S7N 5A2 Canada., Stone K; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139., Yu P; Institute for Environmental and Climate Research, Jinan University, Guangzhou 510630, China., Kinnison D; Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO 80307., Toon OB; Department of Atmospheric and Oceanic Sciences, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303., Strahan SE; Goddard Earth Science Technology and Research (GESTAR), NASA Goddard Space Flight Center, Greenbelt, MD 20771., Rosenlof KH; NOAA Chemical Sciences Laboratory, Boulder, CO 80305., Portmann R; NOAA Chemical Sciences Laboratory, Boulder, CO 80305., Davis S; NOAA Chemical Sciences Laboratory, Boulder, CO 80305., Randel W; Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO 80307., Bernath P; Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529.; Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1 Canada., Boone C; Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529., Bardeen CG; Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO 80307., Bourassa A; Institute for Space and Atmospheric Science, University of Saskatchewan, Saskatoon, SK, S7N 5A2 Canada., Zawada D; Institute for Space and Atmospheric Science, University of Saskatchewan, Saskatoon, SK, S7N 5A2 Canada., Degenstein D; Institute for Space and Atmospheric Science, University of Saskatchewan, Saskatoon, SK, S7N 5A2 Canada.
Jazyk: angličtina
Zdroj: Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2022 Mar 08; Vol. 119 (10), pp. e2117325119. Date of Electronic Publication: 2022 Mar 01.
DOI: 10.1073/pnas.2117325119
Abstrakt: SignificanceLarge wildfires have been observed to inject smoke into the stratosphere, raising questions about their potential to affect the stratospheric ozone layer that protects life on Earth from biologically damaging ultraviolet radiation. Multiple observations of aerosol and NO 2 concentrations from three independent satellite instruments are used here together with model calculations to identify decreases in stratospheric NO 2 concentrations following major Australian 2019 through 2020 wildfires. The data confirm that important chemistry did occur on the smoke particle surfaces. The observed behavior in NO 2 with increasing particle concentrations is a marker for surface chemistry that contributes to midlatitude ozone depletion. The results indicate that increasing wildfire activity in a warming world may slow the recovery of the ozone layer.
Databáze: MEDLINE