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Urbanization is one of the extreme process that increases uncertainty infuture climate projections. Flow regimes of mesoscale circulations associatedwith surface heating due to urbanization have been investigated using a waveletbased computational fluid dynamics~(CFD) model. The results of our numericalmodel have been validated against that of a laboratory model, as well asreference numerical simulations. Characteristics of urban induced circulationshave been studied for surface heat flux perturbation ($H_0$) between$28.93$Wm$^{-2}$ and $925.92$Wm$^{-2}$, and the results have been analyzedagainst available boundary layer measurements under similar physicalconditions. Our primary study shows that urban/rural heat flux anomaliesintroduce strong oscillations in the convective boundary layer (CBL), andtransfers a fraction of the turbulent kinetic energy vertically throughinternal waves. Such results complement previous investigators' hypothesis thattemporal oscillations in urban-induced mesoscale circulations are primarily dueto a downscale energy cascade. Although a further detailed study is necessary,the present numerical observations provide useful feedback for the impacts ofurbanization on regional climate.

Flow Regimes of Mesoscale Circulations Forced by Inhomogeneous Surface Heating