Global QPF and QPE: Where do we have trouble to achieve them?

摘要

@@ 1. Introduction Today, many weather forecast centers are capable of providing quantitative precipitation forecasts (QPF) based on numerical weather prediction (NWP) models. Complementarily. global satellite precipitation retrievals provide quantitative precipitation estimations (QPE) that can be used for real-time monitoring or validation of QPF. However, how much confidence do we have in these two informational sources? How accurate are they? and how consistent is between the two? In this study, assessments of both a global QPE from a satellite precipitation product and corresponding global QPF from a global NWP model are conducted using available global land based gauge data. We devise a scale decomposition technique, coupled with seasonal and spatial classifications, to evaluate these inaccuracies. The results are then analyzed in context with various physical precipitation systems, including heavy monsoonal rains, light Mediterranean winter rains, and North American convective- and midlatitude cyclone-related precipitation.