Articles | Volume 16, issue 13
Methods for assessment of models
13 Jul 2023
Methods for assessment of models |  | 13 Jul 2023

Evaluating precipitation distributions at regional scales: a benchmarking framework and application to CMIP5 and 6 models

Min-Seop Ahn, Paul A. Ullrich, Peter J. Gleckler, Jiwoo Lee, Ana C. Ordonez, and Angeline G. Pendergrass

Model code and software

PCMDI/pcmdi_metrics: PMP Version 2.5.1 (v2.5.1) Jiwoo Lee, Peter Gleckler, Ana Ordonez, Min-Seop Ahn, Paul Ullrich, Tom Vo, Jason Boutte, Charles Doutriaux, Paul Durack, Zeshawn Shaheen, Lina Muryanto, Jeffrey Painter, and John Krasting

Short summary
We introduce a framework for regional-scale evaluation of simulated precipitation distributions with 62 climate reference regions and 10 metrics and apply it to evaluate CMIP5 and CMIP6 models against multiple satellite-based precipitation products. The common model biases identified in this study are mainly associated with the overestimated light precipitation and underestimated heavy precipitation. These biases persist from earlier-generation models and have been slightly improved in CMIP6.