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An evaluation of CORDEX regional climate models in simulating precipitation over Southern Africa

M. Shongwe,C. Lennard,B. Liebmann,E. Kalognomou,L. Ntsangwane,I. Pinto

Published 2015 in Atmospheric Science Letters

ABSTRACT

This article evaluates the ability of the Coordinated Regional Downscaling Experiment (CORDEX) regional climate models (RCMs) in simulating monthly rainfall variation during the austral summer half year (October to March) over southern Africa, the timing of the rainy season and the relative frequencies of rainfall events of varying intensities. The phasing and amplitude of monthly rainfall evolution and the spatial progression of the wet season onset are well simulated by the models. Notwithstanding some systematic biases in a few models, the simulated onset and end of the rainy season and their interannual variability are highly correlated with those computed from the reference data. The strongest agreements between the reference and modelled precipitation patterns are found north of about 20°S in the vicinity of the Inter Tropical Convergence Zone. A majority of the RCMs adequately capture the reference precipitation probability density functions, with a few showing a bias towards excessive light rainfall events.

PUBLICATION RECORD

  • Publication year

    2015

  • Venue

    Atmospheric Science Letters

  • Publication date

    2015-07-01

  • Fields of study

    Geography, Environmental Science

  • Identifiers
    DOI 10.1002/asl2.538
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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