Article,

Decomposition and graphical portrayal of the quantile score

, and .
Q.J.R. Meteorol. Soc., 140 (683): 1924--1934 (Jul 1, 2014)
DOI: 10.1002/qj.2284

Abstract

This study expands the pool of verification methods for probabilistic weather and climate predictions by a decomposition of the quantile score (QS). The QS is a proper score function and evaluates predictive quantiles on a set of forecast–observation pairs. We introduce a decomposition of the QS in reliability, resolution and uncertainty and discuss the biases of the decomposition. Further, a reliability diagram for quantile forecasts is presented. Verification with the QS and its decomposition is illustrated on precipitation forecasts derived from the mesoscale weather prediction ensemble COSMO-DE-EPS of the German Meteorological Service. We argue that the QS is ready to become as popular as the Brier score in forecast verification.

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