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About

John Barnes is a leading atmospheric scientist whose research centers on volcanic and wildfire aerosols, satellite remote sensing, and their impacts on climate and air quality. His most influential work, "Total volcanic stratospheric aerosol optical depths and implications for global climate change" (223 citations), provided critical insights into how small-magnitude volcanic eruptions contribute to the post-2000 slowdown of global warming by quantifying stratospheric aerosol optical depths from satellite observations. This foundational study reshaped understanding of volcanic forcing in climate models. Barnes has also pioneered innovative ground-based and satellite aerosol profiling techniques, including a bistatic camera-lidar system for coastal aerosol studies and rigorous evaluations of cirrus cloud contamination in aerosol retrievals using collocated lidar networks. More recently, his evaluation of NASA MODIS and VIIRS aerosol products during extreme wildfire events in the western USA (2021) advanced the assessment of smoke height and boundary layer dynamics, directly informing air quality monitoring during catastrophic fire seasons. With a career spanning volcanic climate effects to operational satellite validation, Barnes’s work bridges fundamental atmospheric processes and practical environmental monitoring, making him a key figure in aerosol-climate science.