PROCEEDing from surface to sensitivity: confronting a perturbed parameter ensemble with ARM observations
Daniel McCoy
University of Wyoming
Abstract: Parameterized processes continue to be the largest source of uncertainty in the climate forcing and feedback predicted by Earth System Models (ESMs). One way to confront parametric uncertainty in ESMs is through a perturbed parameter ensemble (PPE). Here, we present preliminary work implementing a PPE hosted in E3SMv3 focusing on constraining aerosol-cloud-precipitation interactions (ACPIs). In situ and surface observations are a natural choice to confront and constrain the microphysical processes driving ACPIs, but the way to do that is somewhat ambiguous. In this presentation we present a path towards leveraging observations, including from Atmospheric Radiation Measurement (ARM) East North Atlantic (ENA) observations, to constrain aerosol-cloud interactions in E3SMv3.