Articles | Volume 10, issue 1
Geosci. Model Dev., 10, 105–126, 2017
https://doi.org/10.5194/gmd-10-105-2017
Geosci. Model Dev., 10, 105–126, 2017
https://doi.org/10.5194/gmd-10-105-2017

Model evaluation paper 06 Jan 2017

Model evaluation paper | 06 Jan 2017

Connecting spatial and temporal scales of tropical precipitation in observations and the MetUM-GA6

Gill M. Martin et al.

Data sets

Unified Model Partnership Met Office UM Partnership Team http://www.metoffice.gov.uk/research/collaboration/um-partnership

CMORPH 3-hourly 0.25 degree data National Aeronautics and Space Administration ftp://ftp.cpc.ncep.noaa.gov/precip/global_CMORPH/3-hourly_025deg

TRMM - GES DISC - Goddard Earth Sciences Data and Information Sciences Center National Aeronautics and Space Administration https://disc.sci.gsfc.nasa.gov/TRMM

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Short summary
We analyse and evaluate tropical rainfall variability in the MetUM-GA6 configuration at four different horizontal resolutions, plus one in which the convection parameterization has been switched off. Tropical deep convective rainfall in this model tends to be intermittent in space and time. This behaviour is largely independent of model resolution. Switching off the deep convection parameterization (at ~10 km resolution) results in isolated, but persistent, rainfall on the gridscale.