Description

YOPP dataset consists of two different ECMWF outputs:

1) Operational ensemble forecast (ENS IFS)

• Medium-range forecast up to +360 hours (3-hourly up to 144 hours, then 6-hourly outputs)
• Archived in MARS as Control forecast (type=cf, stream=enfo, class=yp)
• 7 additional pressure levels to have a better vertical resolution in higher altitudes

2) Dedicated research run containing additional tendencies

• Short-range forecast up to +48 hours (3-hourly outputs)
  

• Archived in MARS as Forecast (type=fc, stream=oper, class=yp)

• Research run that mimics very closely the operational control forecast of the ENS IFS was run from the 15.7. 2017 onwards

• Additional tendencies from various physical and dynamical processes were archived on model levels (not available from ENS IFS run)

  • The differences for all parameters are on average small compared to the control forecast run, however, locally there can be differences in some parameters

  • The tendencies description

  • Tendencies description

    Field 3D (note tendencies and fluxes are accumulated)	Units	Grib code
    u-tendency from explicit dynamics	m/s2 * s	162114
    v-tendency from explicit dynamics	m/s2 * s	162115
    T-tendency from explicit dynamics	K/s * s	162116
    q-tendency from explicit dynamics	kg/kg/s * s	162117
    T-tendency from radiation	K/s * s	162118
    u-tendency from vert. diff + orog drag + surf processes	m/s2 * s	162119
    v-tendency from vert. diff + orog drag + surf processes	m/s2 * s	162120
    T-tendency from vert. diff + orog drag + surf processes	K/s * s	162121
    q-tendency from vert. diff + orog drag + surf processes	kg/kg/s * s	162122
    u-tendency of gravity wave drag (including non-orographic)	m/s2 * s	162123
    v-tendency of gravity wave drag (including non-orographic)	m/s2 * s	162124
    T-tendency of gravity wave drag (including non-orographic)  = dissipation wave break	K/s * s	162125
    u-tendency from convection	m/s2 * s	162126
    v-tendency from convection	m/s2 * s	162127
    T-tendency from convection	K/s * s	162128
    q-tendency from convection	kg/kg/s * s	162129
    Precip. flux from convection liquid	kg/(m2 s) * s	162130
    Precip. flux from convection ice	kg/(m2 s) * s	162131
    T-tendency from cloud scheme	K/s * s	162132
    q-tendency from cloud scheme	kg/kg/s * s	162133
    ql-tendency from cloud scheme	kg/kg/s * s	162134
    qi-tendency from cloud scheme	kg/kg/s * s	162135

  • List of the tendencies:

1. 1. 1. 1. U-tendency from dynamics
         2. V-tendency from dynamics
         3. T-tendency from dynamics
         4. q-tendency from dynamics
         5. T-tendency from radiation
         6. U-tendency from turbulent diffusion + subgrid orography
         7. V-tendency from turbulent diffusion + subgrid orography
         8. T-tendency from turbulent diffusion + subgrid orography
         9. q-tendency from turbulent diffusion
         10. U-tendency from subgrid orography
         11. V-tendency from subgrid orography
         12. T-tendency from subgrid orography
         13. U-tendency from convection (deep+shallow)
         14. V-tendency from convection (deep+shallow)
         15. T-tendency from convection (deep+shallow)
         16. q-tendency from convection (deep+shallow)
         17. Liquid Precipitation flux from convection
         18. Ice Precipitation flux from convection
         19. T-tendency from cloud scheme
         20. q-tendency from cloud scheme
         21. ql-tendency from cloud scheme
         22. qi-tendency from cloud scheme
         23. Liquid Precip flux from cloud scheme (stratiform)
         24. Ice Precip flux from cloud scheme (stratiform)