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Communication Dans Un Congrès Année : 2023

Temporal Evolution of Wildfire Plumes Along Long-Range Transport Provides Information on Cloud Processes

Maya George
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J. Riedi
Cathy Clerbaux

Résumé

The number and intensity of wildfires are increasing due to climate change, as evidenced by the devastating wildfires in North America, Europe and Siberia last summer. As a result, more aerosols from biomass burning are released into the atmosphere, with local and remote effects on e.g., air quality. Here we present how space-based observations, models, and simulated air parcel trajectories can help to better represent and parameterize the long-range transport and evolution of biomass burning plumes, focusing on a case study of wildfires in the western United States in 2020. Several geostationary satellites are needed to represent long-range aerosol transports. We use the aerosol optical depth (AOD) from the Aerosol and surface albEdo Retrieval Using a directional Splitting method-application to GEOstationary data (AERUS-GEO) algorithm, which incorporates measurements from the American, European, and Japanese geostationary satellites. We collocate AOD with a passive tracer of combustion plumes, carbon monoxide (CO), from the Infrared Atmospheric Sounding Interferometer (IASI) suite of polar-orbiting satellites. We also examine the retrievals of CO and AOD from the analysis of the Copernicus Atmosphere Monitoring Service (CAMS). Finally, Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) backward and forward trajectories are used to analyze the transport of the air parcels. Some plumes from the western USA were transported across the Atlantic and detected by a ground-based station in northern France. Our results show that CO and AOD from the satellite instruments and CAMS are in good agreement, with a higher correlation over the USA than over Europe. From backward and forward trajectories of air parcels during these wildfire events, we show that the temporal evolution of the ratio of AOD and CO can be a sign of aerosol removal processes such as precipitation. Therefore, the analysis of atmospheric components retrieved from geostationary satellite measurements or models could potentially be used to infer information about cloud processes acting on aerosols and could be used to improve the representation in models.
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Dates et versions

insu-04351864 , version 1 (18-12-2023)

Identifiants

  • HAL Id : insu-04351864 , version 1

Citer

Quentin Coopman, Xavier Ceamanos, Maya George, J. Riedi, Mark Parrington, et al.. Temporal Evolution of Wildfire Plumes Along Long-Range Transport Provides Information on Cloud Processes. AGU Fall Meeting 2023, Dec 2023, San Francisco (Califonia), United States. ⟨insu-04351864⟩
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