Atmospheric and earth systems scientists are welcome to join an open and virtual workshop, “Chemical processing across scales at land-atmosphere interfaces,” from 8 a.m. to 2 p.m. Pacific time (11 a.m. to 5 p.m. Eastern time) on October 17. Co-hosts are ARM and the Environmental Molecular Sciences Laboratory (EMSL). This workshop will discuss, refine, and collect feedback from members of the Atmospheric System Research (ASR) and Environmental System Science (ESS) program communities about ideas and opportunities to improve understanding of coupled land-atmosphere processes.