Contrasting Chlorine Chemistry on Volcanic and Wildfire Aerosols in the Southern Mid‐Latitude Lower Stratosphere
Name
Geophysical Research Letters - 2024 - Wang - Contrasting Chlorine Chemistry on Volcanic and Wildfire Aerosols in the.pdf
Description
Published version
Size
1.81 MB
Format
Adobe PDF
Checksum (MD5)
8065d0726a9054067f11f5178b15efab
Author(s)
Wang, Peidong
Solomon, Susan
Date Issued
September 11, 2024
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Wang, Peidong and Solomon, Susan. 2024. "Contrasting Chlorine Chemistry on Volcanic and Wildfire Aerosols in the Southern Mid‐Latitude Lower Stratosphere." Geophysical Research Letters, 51 (18).
Version
Final published version
Abstract
Volcanic eruptions and wildfires can impact stratospheric chemistry. We apply tracer‐tracer correlations to satellite data from Atmospheric Chemistry Experiment—Fourier Transform Spectrometer and the Halogen Occultation Experiment at 68 hPa to consistently compare the chemical impact on HCl after multiple wildfires and volcanic eruptions of different magnitudes. The 2020 Australian New Year (ANY) fire displayed an order of magnitude less stratospheric aerosol extinction than the 1991 Pinatubo eruption, but showed similar large changes in mid‐latitude lower stratosphere HCl. While the mid‐latitude aerosol loadings from the 2015 Calbuco and 2022 Hunga volcanic eruptions were similar to the ANY fire, little impact on HCl occurred. The 2009 Australian Black Saturday fire and 2021 smoke remaining from 2020 yield small HCl changes, at the edge of the detection method. These observed contrasts across events highlight greater reactivity for smoke versus volcanic aerosols at warm temperatures.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
10.1029/2024gl110412
