2026 TDep Webinar Series
NADP’s Total Deposition Science Committee invites you to our next TDep Webinar Series presentation:
Thursday, August 27th, 12-1pm EDT (11am-12pm CT)
Source and Sink Attributions from Satellites Using Deep Learning Models
Presented by Dr. Kang Sun, University of Buffalo
Generations of satellites have revolutionized the observations of manmade and natural emission sources. A unified framework quantifying emission fluxes from satellite-observed column amounts is derived from mass conservation. The flux information originates from the inner product of the horizontal wind and the gradient of column amount. Additionally, the topographical and chemical effects are accounted for through observation-based scale height and chemical reactivity. This framework derives emissions of multiple key atmospheric species observed by the new generation satellite instruments. Empowered by abundant measurement data, deep learning models disentangle chemical loss and topographical effects from explicit point- and area-sources, leading to spatiotemporally continuous source and sink attributions. Soil NOx unveiled from TROPOMI observations will be presented as an example of separating weak signals from intertwining interferences.
For more information and Zoom registration link: https://nadp.slh.wisc.edu/tdepwebinar-2026-sun/