CPO’s Earth System Science and Modeling Division (ESSM) was well-represented at #AGU21. ESSM-supported principal investigators (PIs) came out in force for the annual AGU Fall Meeting, presenting as first authors on dozens of talks, convening numerous sessions, and represented as contributing authors on hundreds of posters and presentations. Below are a variety of metrics highlighting ESSM representation at AGU. The Atmospheric Chemistry, Carbon Cycle, & Climate (AC4) program had a total of 25 PIs presenting 29 talks, with four PIs giving invited talks, e.g. Gregory Carmichael (University of Iowa) on “Advancing Atmospheric Composition Modeling across Air Quality, Weather and Climate Applications.” AC4-affiliated PIs have convened 33 sessions and are authors on 309 posters. More than 20 PIs or research team members, including graduate students and early career postdoctoral researchers, presented on Climate Observations and Monitoring (COM)-relevant projects. Topics ranged from Hurricanes to the Atmospheric Boundary Layer to Arctic Sea Ice Dynamics and several others that align with NOAA Research priorities. These presentations represent a total of 40 abstracts describing projects that are either directly funded or related to current or past COM-funded projects over the last 7 year. As leaders in their field, seven of the PIs led sessions. In addition to highlighting COM research priorities, two PIs co-authored presentations addressing the lack of diversity in geosciences, the state of recruitment and retention of minority students, and virtual field experiments expanding science accessibility. Climate Variability & Predictability (CVP)-supported PIs were presenting authors for papers on CMIP6 model evaluation, high-resolution earth systems modeling, tropical basin processes, and new results from the ATOMIC/EUREC4A campaign. CVP researchers also participated in several poster sessions including the “Tropical Pacific Atmospheric and Oceanic Boundary Layer Process Understanding and Representation in Models” session convened by CVP PIs Aneesh Subramanian, Anna-Lena Deppenmeier, Deepak Cherian, and Cheyenne Stienbarger (all NOAA/GOMO). For the Modeling, Analysis, Predictions, and Projections (MAPP) program, Drought Task Force leaders Isla Simpson (NCAR), Andrew Hoell (NOAA/PSL), Justin Mankin (Dartmouth College), and Rong Fu (UCLA) convened three oral presentation sessions and a poster session on “Drought: Mechanisms and Impacts in the Past, Present, and Future.” Meanwhile, MAPP Model Diagnostic Task Force members Fiaz Ahmed (UCLA), Eric Maloney (Colorado State University), David Neelin (UCLA), and Allison Wing (Lamont-Doherty Earth Observatory) organized the “Process-Oriented Diagnostics for Weather and Climate Models” poster presentation session. Overall, contributions by ESSM-supported PIs ensure that ESSM, CPO, and NOAA research priorities are major topics of discussion at AGU and in the larger earth system science conversation.