Difference between revisions of "Thermal plume model Generic PCM"
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== Implementation in the Generic PCM == | == Implementation in the Generic PCM == | ||
| + | |||
| + | === Code === | ||
| + | |||
| + | === Edition history === | ||
| + | |||
| + | Authors: F. Hourdin, C. Rio, A. Mathieu, A. Boissinot, A. Le Saux | ||
| + | |||
| + | Version du 09.02.07 | ||
| + | Calculation of vertical transport in the boundary layer in the presence of explicitly represented “thermals” with cloud processes | ||
| + | |||
| + | Rewriting from a paper listing in Habas, 14/02/00 | ||
| + | |||
| + | Thermal energy is assumed to be homogeneous and dissipated by mixing with its surroundings. | ||
| + | The length l_mix controls the mixing efficiency. | ||
| + | |||
| + | The transport of the different species is calculated by taking into account: | ||
| + | 1. upward mass flux | ||
| + | 2. downward mass flux | ||
| + | 3. entrainment | ||
| + | 4. a detrainment | ||
| + | |||
| + | Modif 2013/01/04 (FH hourdin@lmd.jussieu.fr) | ||
| + | Introduction of an implicit computation of vertical advection in the environment of thermal plumes in thermcell_dq | ||
| + | impl = 0 : explicit ; impl = 1 : implicit ; impl =-1 : old version | ||
| + | controled by iflag_thermals = | ||
| + | 15, 16 run with impl=-1 : numerical convergence with NPv3 | ||
| + | 17, 18 run with impl=1 : more stable | ||
| + | 15 and 17 correspond to the activation of the stratocumulus "bidouille" | ||
| + | |||
| + | Major changes 2018-19 (AB alexandre.boissinot@lmd.jussieu.fr) | ||
| + | New detr and entre formulae (no longer alimentation) | ||
| + | lmin can be greater than 1 | ||
| + | Mix every tracer | ||
| + | Can stack verticaly multiple plumes (it makes thermcell_dv2 unusable for the moment) | ||
| + | |||
| + | Modif 2024 (ALS, arthur.le-saux@lmd.ipsl.fr) | ||
| + | Implementation to take into account generic tracers | ||
== How to use it? == | == How to use it? == | ||
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The TPM is activated in callphys.def with | The TPM is activated in callphys.def with | ||
| − | calltherm = . | + | calltherm = .True. |
| + | |||
| + | Remember to also turn off the convective adjustment scheme to use only one parametrisation of convection | ||
| + | calladj = .True. | ||
Then, several options may be used to tune the model | Then, several options may be used to tune the model | ||
| − | dvimpl = . | + | dvimpl = .False. |
| − | dqimpl = . | + | dqimpl = .True. |
r_aspect_thermals = 2.0 | r_aspect_thermals = 2.0 | ||
tau_thermals = 0.0 | tau_thermals = 0.0 | ||
| Line 30: | Line 70: | ||
== References == | == References == | ||
| + | |||
| + | [[Category:Generic-Model]] | ||
| + | [[Category:Generic-DYNAMICO]] | ||
Revision as of 10:52, 5 March 2025
Contents
Description of the Thermal plume model
Implementation in the Generic PCM
Code
Edition history
Authors: F. Hourdin, C. Rio, A. Mathieu, A. Boissinot, A. Le Saux
Version du 09.02.07 Calculation of vertical transport in the boundary layer in the presence of explicitly represented “thermals” with cloud processes
Rewriting from a paper listing in Habas, 14/02/00
Thermal energy is assumed to be homogeneous and dissipated by mixing with its surroundings. The length l_mix controls the mixing efficiency.
The transport of the different species is calculated by taking into account:
1. upward mass flux
2. downward mass flux
3. entrainment
4. a detrainment
Modif 2013/01/04 (FH hourdin@lmd.jussieu.fr)
Introduction of an implicit computation of vertical advection in the environment of thermal plumes in thermcell_dq
impl = 0 : explicit ; impl = 1 : implicit ; impl =-1 : old version
controled by iflag_thermals =
15, 16 run with impl=-1 : numerical convergence with NPv3
17, 18 run with impl=1 : more stable
15 and 17 correspond to the activation of the stratocumulus "bidouille"
Major changes 2018-19 (AB alexandre.boissinot@lmd.jussieu.fr)
New detr and entre formulae (no longer alimentation)
lmin can be greater than 1
Mix every tracer
Can stack verticaly multiple plumes (it makes thermcell_dv2 unusable for the moment)
Modif 2024 (ALS, arthur.le-saux@lmd.ipsl.fr) Implementation to take into account generic tracers
How to use it?
In a 1D rcm1d run
The TPM is activated in callphys.def with
calltherm = .True.
Remember to also turn off the convective adjustment scheme to use only one parametrisation of convection
calladj = .True.
Then, several options may be used to tune the model
dvimpl = .False. dqimpl = .True. r_aspect_thermals = 2.0 tau_thermals = 0.0 betalpha = 0.9 afact = 0.9 fact_epsilon = 1.e-4 alpha_max = 0.7 fomass_max = 0.5 pres_limit = 1.e3 nu = 0.0
