Articles | Volume 10, issue 5
https://doi.org/10.5194/gmd-10-1927-2017
https://doi.org/10.5194/gmd-10-1927-2017
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, Michael Schulz, Peter Wind, Álvaro M. Valdebenito, and Hilde Fagerli

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AR by Birthe Marie Steensen on behalf of the Authors (10 Apr 2017)  Author's response   Manuscript 
ED: Publish subject to technical corrections (19 Apr 2017) by Augustin Colette
AR by Birthe Marie Steensen on behalf of the Authors (21 Apr 2017)  Author's response   Manuscript 
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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.