Understanding the Extratropical Liquid Water Path Feedback in Mixed-Phase Clouds with an Idealized Global Climate Model

Abstract A negative shortwave cloud feedback associated with higher extratropical liquid water content in mixed-phase clouds is a common feature of global warming simulations, and multiple mechanisms have been hypothesized. set process-level experiments performed an idealized climate model (a dynamical core passive tracers full Rotstayn–Klein single-moment microphysics) show that the picture path (LWP) being controlled by amount ice susceptible to phase change not robust. Dynamic condensate processes—rather than static partitioning—directly warming, varied impacts on amounts. Here, three principal are responsible for LWP response, namely adiabatic content, weaker liquid-to-ice conversion through Bergeron–Findeisen process, faster melting snow rain. Only accompanied substantial loss ice, while increase gives rise net (IWP) such total also increases without accompanying decrease precipitation efficiency. Perturbed parameter wide range climatological IWP demonstrate strong dependence independence from supercooled fraction. This setup allows clean isolation paints more nuanced simple change.