Scientists funded by CPO’s Atmospheric Chemistry, Carbon Cycle, and Climate (AC4) Program, representing the breadth of AC4 research, have launched a new webinar series called Frontiers in Atmospheric Chemistry. This high profile virtual seminar series will take place “live” on Zoom webinars on Fridays at 10am Pacific / 1pm Eastern over the 2020-2021 academic year. Speakers will be a mix of junior and senior faculty members from North America. Presenters are encouraged to share unpublished results; as a result recordings or transcripts of talks will not be made available following the webinar. This series was organized across multiple institutions and anyone in the atmospheric chemistry community is welcome to attend the webinars.