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titleKey questions and tasks using the control forecast

 

  1. Understand the weather situation over Africa.
  2. What is the role of large scale in this case (compare with N.America case).
  3. Look at the diurnal variation of key parameters (2m temperature, surface heat fluxes, precipitation, outgoing-longwave-radiation) for location 0N,25E.
  4. Compare differences in convection profiles between Central Africa and (i) open ocean, and (ii) Amazonia.

 

 

 

  • Describe the phase and amplitude of (scaling) of the precipitation with the different experiments with respect to surface heat fluxes.
    • What is it that scales precipitation flux? 
    Compare buoyancy flux with enthalpy. Think about the effect of local heating combined with atmospheric moisture.
    How important is the correct diurnal cycle of precipitation and radiation for 2m temperature and dewpoint forecast?

    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.

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    fields with respect to the reference. Note also this is having less impact with the diurnal cycle

    activated.

     

    Additional questions

    • How important is the correct diurnal cycle of precipitation and radiation for 2m temperature and dewpoint forecast?

    Further reading

     

    More information about the N.American tornadoes can be found on the ECMWF Severe Event Catalogue - 201404 - Convection - Arkansas U.S

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