One promising result in the Multi-scale Modeling Framework (MMF) is a global improvement in the timing of peak precipitation over the continents, which is suggestive of improved moist dynamics at diurnal timescales. We explore the realism of the MMF simulated diurnal cycle of precipitation in detail, by comparing a comprehensive suite of diurnal cycle diagnostics - ranging from harmonic and empirical orthogonal function decomposition to local metrics of the broadness of the maximum precipitation in the mean summer day - to rainfall retrievals from the Tropical Rainfall Measuring Mission (TRMM) and to a control simulation that employs conventional cloud and boundary layer parameterizations. Our emphasis is on understanding the subset of physical processes resolved by the nested cloud model in the MMF that are implicated in improved diurnal rainfall variability in several regions of the globe.
Supplementary URL: