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Microphysics

Methods

ClimateMachine.Microphysics.terminal_velocity — Function
terminal_velocity(q_rai, ρ)

where:

  • q_rai - rain water specific humidity
  • ρ - density of air

Returns the mass weighted average rain terminal velocity assuming Marshall Palmer 1948 distribution of rain drops.

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ClimateMachine.Microphysics.conv_q_vap_to_q_liq — Function
conv_q_vap_to_q_liq(q_sat, q)

where:

  • q_sat - PhasePartition at equilibrium
  • q - current PhasePartition

Returns the q_liq tendency due to condensation/evaporation. The tendency is obtained assuming a relaxation to equilibrium with constant timescale.

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ClimateMachine.Microphysics.conv_q_liq_to_q_rai_accr — Function
conv_q_liq_to_q_rai_accr(param_set, q_liq, q_rai, ρ)

where:

  • param_set - is an AbstractParameterSet
  • q_liq - is the liquid water specific humidity
  • q_rai - is the rain water specific humidity
  • ρ - is the density of air

Returns the q_rai tendency due to collisions between cloud droplets and rain drops (accretion) parametrized following Kessler 1995.

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ClimateMachine.Microphysics.conv_q_rai_to_q_vap — Function
conv_q_rai_to_q_vap(q_rai, q, T, p, ρ)

where:

  • q_rai - rain water specific humidity
  • q - current PhasePartition
  • T - temperature
  • p - pressure
  • ρ - air density

Returns the q_rai tendency due to rain evaporation. Parameterized following Smolarkiewicz and Grabowski 1996.

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