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IFS Documentation front page

I Observations
II Assimilation
III Dynamics
IV Physics
V Ensemble
VI Technical
VII Waves

   

APPENDIX A List of symbols

Convective available potential energy

Convective chemical Tracer no i

Convective Tracer concentration in updraught

Convective Tracer concentration in downdraught

Drag coefficient

Fraction of grid square occupied by convection

Specific at constant pressure for dry air

Condensation/sublimation in the updraughts

Rate of mass detrainment in the updraughts

Rate of mass detrainment in the downdraughts

Rate of mass entrainment in the updraughts

Rate of mass entrainment in the downdraughts

Evaporation of rain

Evaporation of precipitation (rain and snow) in the downdraughts

Evaporation of rain in the downdraughts

Evaporation of snow in the downdraughts

Evaporation of precipitation (rain and snow) in the unsaturated sub-cloud

layer

Evaporation of rain in the unsaturated sub-cloud layer

Evaporation of snow in the unsaturated sub-cloud layer

Freezing rate of condensate in the updraughts

Conversion rate from cloud (water+ice) into precipitation (rain+snow)

Conversion rate from cloud water into rain

Conversion rate from cloud ice into snow

Moist static energy () in the environment

Saturated moist statice energy in the environment

Moist static energy in the updraughts

Moist static energy in the downdraughts

Surface turbulent sensible heat flux

Surface turbulent latent heat flux

Kinetic energy in the updraughts

Effective latent heat for an ice/water mix

Latent heat of fusion

Latent heat of sublimation

Latent heat of vaporization

LCL Lifting Condensation Level

CFL Courant-Friedrich-Levy criterium

Cloud water/ice content in the updraughts

Melting rate of snow

Net mass flux in the convective clouds (updraughts + downdraughts)

Net mass flux in the downdraughts

Net mass flux in the downdraughts

Net flux of precipitation in the form of rain

Net flux of precipitation in the form of snow

pressure

Specific humidity of the environment

Specific humidity in the updraughts

Specific humidity in the downdraughts

Rain intensity

Relative humidity

Precipitation (rain+snow) in the updraughts

Precipitation (rain+snow) in the downdraughts

Fall-out of rain/snow

Dry static energy in the environment

Dry static energy in the updraughts

Dry static energy in the downdraughts

Virtual temperature in the environment

Virtual temperature in the updraughts

component of wind in the environment

component of wind in the updraughts

component of wind in the downdraughts

Mean terminal velocity of precipitation (rain+snow)

Mean terminal velocity of rain drops

component of wind in the environment

component of wind in the updraughts

component of wind in the downdraughts

Vertical velocity in the environment

Vertical velocity in the updraughts

Convective velocity scale

Detrainment per unit length

Entrainment per unit length

Density of air

Density of rain

Adjustment time scale

Omega (large-scale) vertical velocity

Pressure difference between two model half-levels

Model time step


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