B29. Tropical Cyclone Rainfall Structures in CMIP6 HighResMIP Simulations

Title

Evaluation of tropical cyclone rainfall structures in CMIP6 HighResMIP simulations

Authors

Yumin Moon, University of Washington

Abstract

This study examines tropical cyclones (TCs) that are simulated by CMIP6 HighResMIP global climate models (GCMs). Previous studies have examined GCM-simulated TC structures, often focusing on wind structures and upper-level warm-core anomalies. However, not many studies have evaluated TC rainfall structures in GCM simulations. In this work, we perform an observation-based evaluation of GCM-simulated TCs by comparing against the multiple satellite-based rainfall retrievals. This process-oriented diagnosis can help determine which GCMs produce more realistic TCs than others in terms of key TC processes. Preliminary results indicate that GCM-simulated TCs in CMIP6 HighResMIP simulations tend to overestimate the inner-core rainfall in comparison to the satellite-derived rainfall at comparable intensity.