Hadley Circulation in the Present and Future Climate Simulations of the K-ACE Model

Abstract Hadley circulation (HC) is a planetary-scale overturning in the tropics that transports momentum, heat, and moisture poleward. In this study, we evaluate strength extent of HC historical future climate simulations Korean Meteorological Administration (KMA) Advanced Community Earth system model (K-ACE), which was recently developed by National Institute Sciences Korea. Compared with reanalysis product, overall structure reasonably reproduced K-ACE. At same time, it also found Northern Hemisphere K-ACE shifted southward few degrees, while Southern (SH) under-represented approximately 20%. These biases can be explained eddy momentum flux precipitation tropics. under Shared Socioeconomic Pathway 5-Representative Concentration 8.5 scenario, HCs show weakening widening trend both hemispheres, consistent projections many Coupled Model Intercomparison Project Phase 6 models. A notable feature SH HC, takes place at rate about double multi-model mean. Climate models share component K-ACE, such as UKESM, HadGEM3-GC31-LL, ACCESS-CM2/ESM1, enhanced poleward expansion SH. This strong shown to dominated regional over Pacific.