Articles | Volume 10, issue 5
Geosci. Model Dev., 10, 1927–1943, 2017
Geosci. Model Dev., 10, 1927–1943, 2017

Development and technical paper 17 May 2017

Development and technical paper | 17 May 2017

The operational eEMEP model version 10.4 for volcanic SO2 and ash forecasting

Birthe M. Steensen et al.

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Short summary
The operational emergency version of the EMEP MSC-W model for dispersion calculations of volcanic SO2 and ash is described. Additions and changes to the standard EMEP MSC-W are presented. Grid resolution dependencies for meteorological data and numerical diffusion are studied by investigating model results driven by ensemble meteorological data for volcanic SO2 emissions. The vertical ash layer sensitivity on gravitational settling is evaluated by comparing model results to lidar observations.