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  • Presentation | A51J: Advances in the Integrated Global Observing System for Air Quality: Science and Societal Benefit IV Poster
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  • A51J-0828: Aerosol chemistry following a degassing volcanic plume using a detailed regional model: Insights from evaluating against satellite retrievals and in situ observations.
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Author(s):
Manas Mohanty, University of California Los Angeles (First Author, Presenting Author)
Pablo Saide, University of California Los Angeles
Julianna Christopoulos, University of California Los Angeles
ManishKumar Shrivastava, Pacific Northwest National Laboratory
Bin Zhao, Tsinghua University
Brian Gaudet, Pacific Northwest National Laboratory
Jhoon Kim, Yonsei University
Minseok KIM, Yonsei University
John Crounse, California Institute of Technology
Paul Wennberg, California Institute of Technology
Kat Ball, California Institute of Technology
Young Ro Lee, California Institute of Technology
Richard Moore, NASA Langley Research Center
Luke Ziemba, NASA Langley Research Center
Edward Winstead, NASA Langley Research Center
Carolyn Jordan, NASA Langley Research Center
Michael Shook, NASA Langley Research Center
Francesca Gallo, NASA Langley Research Center
Claire Robinson, NASA Langley Research Center
Sayantee Roy, NASA Langley Research Center
Jose Jimenez, University of Colorado Boulder
Pedro Campuzano Jost, University of Colorado Boulder
Guy Symonds, University of Colorado at Boulder
Dongwook Kim, University of Colorado at Boulder


Volcanoes release large amounts of sulfur dioxide, which can form sulfate aerosols that affect air quality, cloud formation, and climate. In this study, we use an advanced atmospheric model called WRF-Chem to simulate the volcanic plume from the Taal volcano in the Philippines during February 2024. The model includes a detailed chemical and aerosol module (SAPRC-MOSAIC with 20 aerosol bins) that allows us to track how gases like SO₂ are converted into particles in the atmosphere. We incorporated real-world volcanic emissions and compared the model results with aircraft and satellite observations collected during the NASA ASIA-AQ field campaign. The model successfully reproduced the spread and altitude of the volcanic plume, as well as the observed SO₂ and sulfate concentrations. However, it tended to overestimate sulfate levels and underestimate organic particles linked to the plume. Observations showed strong new particle formation in the 3-10 nm size range, which the model partially captured but primarily through growth of existing particles. Our findings highlight the importance of using detailed aerosol schemes and accurate emission data to simulate volcanic impacts. Improving the model’s ability to represent particle numbers and sizes is key to better predicting air quality and climate effects from volcanic activity.



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