Greetings Volcano Listserv colleagues, For the past three years I've been leading a working group on wildfires and urban smoke in the Pacific Northwest. We've held around 100 webinars on all aspects of these topics, including a few that overlapped with volcanology (you can find a YouTube playlist with links to recordings of all the talks at https://urldefense.com/v3/__https://www.youtube.com/playlist?list=PLQvQiqeQdTK68OFN6706xECEbxwTpYUpR__;!!IKRxdwAv5BmarQ!ZI1jTJEbocf8GtZworyEAC6MpT0WHra4Yt_kkR8WXOQu7W-oWWc32la21gdwXJtmVauTjy1aB4XzX5lc$ <https://urldefense.com/v3/__https://www.youtube.com/playlist?list=PLQvQiqeQdTK68OFN6706xECEbxwTpYUpR__;!!IKRxdwAv5BmarQ!cbZyaUbmG8zRPewUgnHDau0qLdMwcGQRIirwycs3l5F14aHndxogPBiyfVAqQsopZnsufikrWHhaM3uI$> ). This Wednesday at 10 am Pacific time, we are having a webinar that may be of interest to some of you, about the atmospheric impacts of massive wildfires, like Australia's 2019-2020 "Black Summer," and major volcanic eruptions. Dr. Peter Bernath from University of Waterloo and Old Dominion University will discuss results from the Atmospheric Chemistry Experiment (ACE) satellite, published in *Science* in March ( https://urldefense.com/v3/__https://www.science.org/doi/full/10.1126/science.abm5611__;!!IKRxdwAv5BmarQ!ZI1jTJEbocf8GtZworyEAC6MpT0WHra4Yt_kkR8WXOQu7W-oWWc32la21gdwXJtmVauTjy1aB3km9aES$ ), "Wildfire smoke destroys stratospheric ozone." Besides describing the implications for a wildfire audience, Peter is particularly interested in talking about these results with volcano scientists. Please join us, Wednesday June 29, at 10 am Pacific, at this Webex link: https://urldefense.com/v3/__https://uwaterloo.webex.com/uwaterloo/j.php?MTID=m0cb17a1c8eeea52ad08791f05662a108__;!!IKRxdwAv5BmarQ!ZI1jTJEbocf8GtZworyEAC6MpT0WHra4Yt_kkR8WXOQu7W-oWWc32la21gdwXJtmVauTjy1aBywVrhzc$ <https://urldefense.com/v3/__https://www.google.com/url?q=https:**Auwaterloo.webex.com*uwaterloo*j.php*MTID*3Dm0cb17a1c8eeea52ad08791f05662a108&sa=D&source=calendar&ust=1656435715581636&usg=AOvVaw39FgclzlJaCBiVHgWzAtYl__;Ly8vLz8l!!IKRxdwAv5BmarQ!cbZyaUbmG8zRPewUgnHDau0qLdMwcGQRIirwycs3l5F14aHndxogPBiyfVAqQsopZnsufikrWNEu1NyH$> Meeting number (access code): 2313 358 0268 Meeting password: EQwWtaj2P33 Here's Peter's abstract: Atmospheric Chemistry Experiment (ACE): Overview, Fire Chemistry and Volcanic Plumes Prof. Peter Bernath Department of Chemistry & Biochemistry, Old Dominion University, Norfolk, VA And Department of Chemistry, University of Waterloo, Waterloo, ON. The ACE satellite (https://urldefense.com/v3/__http://www.ace.uwaterloo.ca/__;!!IKRxdwAv5BmarQ!ZI1jTJEbocf8GtZworyEAC6MpT0WHra4Yt_kkR8WXOQu7W-oWWc32la21gdwXJtmVauTjy1aB3ZBJzVX$ <https://urldefense.com/v3/__http://www.ace.uwaterloo.ca/__;!!IKRxdwAv5BmarQ!cbZyaUbmG8zRPewUgnHDau0qLdMwcGQRIirwycs3l5F14aHndxogPBiyfVAqQsopZnsufikrWHxSyeZj$>) [1] is measuring atmospheric composition by solar occultation from low Earth orbit. The primary ACE instrument is an infrared Fourier transform spectrometer (ACE-FTS). ACE-FTS measures infrared spectra of aerosols and clouds by removing gas phase features to leave â??residualâ?? spectra. So far ACE-FTS has observed spectra of Polar Mesospheric Clouds (PMCs), Polar Stratospheric Clouds (PSCs), stratospheric smoke, sulfate aerosols, cirrus clouds and volcanic ash. This presentation will focus on stratospheric smoke particles from large wildfires and the characterization of sulfate aerosols from volcanic eruptions. We have discovered a new chemistry catalyzed by smoke particles injected into the stratosphere by extreme wildfires (â??Wildfire fire smoke destroys stratospheric ozoneâ?? [2]). [1] P. F. Bernath, The Atmospheric Chemistry Experiment (ACE), J. Quant. Spectrosc. Rad. Transfer 186, 3-16 (2017). [2] P. Bernath, C. Boone and J. Crouse, Wildfire smoke destroys stratospheric ozone, Science 375, 1292-1295 (2022). ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). 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