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  • What's the impact of the different 'lead times' on the forecast of the storm (i.e. starting from different dates)?
  • What's the difference and why between forecasts started with the operational analysis of the time and the ERA-Interim analysis?

Sensitivity experiments

The IFS is highly tuned to give the best forecast over a range of initial conditions. However, it is instructive to try some sensitivity experiments to understand the role of various physical and dynamical processes.

  • What's the impact of resolution on the forecast of the storm?
  • Reduce the timestep of the model - does this improve or worsen the forecast?

Further reading

This article in a recent ECMWF Newsletter has a description of student projects at the University of Stockholm using the Lothar storm case study.

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