An Intermediate Complexity Approach to the Dynamics of Localized Extreme Heatwaves in the Mid-Latitude Atmosphere for moist-convective environments using Aeolus2.0

This research aims to examine the evolution of the large-scale localized buoyancy anomalies in mid-latitude regions, investigating the adjustments in the atmosphere for moist-convective environments. For the global dynamical simulation, the two-layer moist-convective thermal rotating shallow water (mcTRSW) model Aeolus2.0 with intermediate complexity was employed. The concept of two interacting layers enabled the study of the dynamics of localized extreme heatwaves in baroclinic and barotropic situations. The model initialization comprises daily averaged velocity and potential temperature variables from ERA5 data. The results reveal the presence of a circular positive buoyancy anomaly in the lower layer, while the upper layer shows opposite circular rotation wind movement for some of the cases analyzed. The condensed liquid water content anomaly evolution shows that baroclinic localized buoyancy perturbation should play an important role for increased cloud formation and condensation, as a result of the heatwave propagation in the atmosphere for those extreme forcings. Comparing the strong and weak buoyancy anomalies results, we can notice the prolonged effects of baroclinic initial condition over the barotropic case.