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DESCRIPTION
Parameterization and physico-dynamical interface developments for the LAM ALADIN and CSRM AROME Jean-Marcel Piriou, Météo-France. EWGLAM / SRNWP Workshop, Zürich 9-13 October 2006. Garde. Introduction Operational and research models operated: designing unified schemes. PHYSICS. - PowerPoint PPT PresentationTRANSCRIPT
GardeGardeGardeGardeParameterization and physico-dynamical interface Parameterization and physico-dynamical interface developments for the LAM ALADIN and CSRM AROMEdevelopments for the LAM ALADIN and CSRM AROMEJean-Marcel Piriou, Météo-France.Jean-Marcel Piriou, Météo-France.EWGLAM / SRNWP Workshop, Zürich 9-13 October 2006.EWGLAM / SRNWP Workshop, Zürich 9-13 October 2006.
Parameterization and physico-dynamical interface Parameterization and physico-dynamical interface developments for the LAM ALADIN and CSRM AROMEdevelopments for the LAM ALADIN and CSRM AROMEJean-Marcel Piriou, Météo-France.Jean-Marcel Piriou, Météo-France.EWGLAM / SRNWP Workshop, Zürich 9-13 October 2006.EWGLAM / SRNWP Workshop, Zürich 9-13 October 2006.
IntroductionIntroduction
Operational and research models operated: designing unified Operational and research models operated: designing unified
schemesschemes
IntroductionIntroduction
Operational and research models operated: designing unified Operational and research models operated: designing unified
schemesschemes
Global regular ARPEGE
Global ARPEGEAquaplanet mode
PHYSICS
SCM ARPEGE (EUROCS, GATE, TOGA,BOMEX, ARM, RICO, …)
CSRM AROME / 3DVAR / 2.5 km
LAM ALADIN / 3DVAR / 5-10 km
Global stretched ARPEGE / 4DVAR-ass. / 23 to 133 km
Sharing parameterizations between Sharing parameterizations between models:models:
1.1. Simpler to manage a single set of Simpler to manage a single set of source codes.source codes.
2.2. Feedback from cases studies, Feedback from cases studies, scores, users scores, users modifications modifications improve also the other models.improve also the other models.
3.3. Sharing a simple and general Sharing a simple and general concept concept better understanding: better understanding: convection, …convection, …
IntroductionIntroduction
Several operational and research models operatedSeveral operational and research models operated
IntroductionIntroduction
Several operational and research models operatedSeveral operational and research models operated
SummarySummarySummarySummary
On-going efforts in designing unified equation sets:On-going efforts in designing unified equation sets:
1.1. Subgrid-scale convection: 3MT Subgrid-scale convection: 3MT Fit wider range Fit wider range of grid sizes (GCM - LAM - CSRM).of grid sizes (GCM - LAM - CSRM).
2.2. Grid-scale: Catry et al. 2006 equations: flux-Grid-scale: Catry et al. 2006 equations: flux-conservative thermodynamic equations.conservative thermodynamic equations.
3.3. Phys.-dyn. diagnostics: shared between GCM – Phys.-dyn. diagnostics: shared between GCM – LAM - CSRMLAM - CSRM
CSRM AROME developmentsCSRM AROME developments
1.1. Testing the prototypeTesting the prototype
2.2. Subgrid-scale shallow convection Subgrid-scale shallow convection
FinFinFinFin
3MT: A convective scheme using 3MT: A convective scheme using separate microphysics and separate microphysics and transport terms in grid-scale transport terms in grid-scale equationsequations
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Separating microphysics and transport in grid-scale convective Separating microphysics and transport in grid-scale convective
equationsequations
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Separating microphysics and transport in grid-scale convective Separating microphysics and transport in grid-scale convective
equationsequations
(Q1c: réchauffement convectif, Q2c: assèchement convectif fois L)(Q1c: réchauffement convectif, Q2c: assèchement convectif fois L)
Net condensationNet condensation
TransportTransport
3MT:
Unbuoyant convective condens. (overs.)Unbuoyant convective condens. (overs.)
Cloudy evaporation Cloudy evaporation
Precipitation evaporation Precipitation evaporation
TransportTransport
SH précip., melt. SH précip., melt.
Buoyant convective condensationBuoyant convective condensation
3MTM & T coupled:
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
3MT:
Consequences:Consequences:
• Grid-scale equations of the SGS convective Grid-scale equations of the SGS convective scheme are closer to those of CSRM or LES.scheme are closer to those of CSRM or LES.
• Can share microphysical modules between CSRM Can share microphysical modules between CSRM and parameterization.and parameterization.
• Validation of the parameterization versus CSRM or Validation of the parameterization versus CSRM or LES can be done for each of the above terms.LES can be done for each of the above terms.
• No need to assume a stationnarized cloud budget No need to assume a stationnarized cloud budget more consistent with a future prognostic more consistent with a future prognostic equation of cloud fraction.equation of cloud fraction.
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
What has been done so farWhat has been done so far
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
What has been done so farWhat has been done so far
3MT:
First prototype withFirst prototype with
• Deliberately crude microphysics (simple Deliberately crude microphysics (simple condensation scheme, autoconversion/collection, condensation scheme, autoconversion/collection, diagnostic q_r q_s, Kessler-type evaporation)diagnostic q_r q_s, Kessler-type evaporation)
• New proposal for entrainmentNew proposal for entrainment
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Mass flux / vertical velocity in the SGS convectif updraftMass flux / vertical velocity in the SGS convectif updraft
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Mass flux / vertical velocity in the SGS convectif updraftMass flux / vertical velocity in the SGS convectif updraft
Taking into account the overshoots.Taking into account the overshoots.
LNB
Vertical integral of buoyancy
Top
P & NH effects Siebesma et al. (2003)
3MT:3MT:
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
Shallow cumulus phase
High entrainment: 1310 m
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
Precipitating cumulus phase
Intermediate entrainment: 14106 m
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Cold pools and entrainmentCold pools and entrainment
Deep convection phase
Low entrainment: 14103 m
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Entrainment: an heuristic proposal: prognostic link evap. prec. Entrainment: an heuristic proposal: prognostic link evap. prec.
entr.entr.
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Entrainment: an heuristic proposal: prognostic link evap. prec. Entrainment: an heuristic proposal: prognostic link evap. prec.
entr.entr.
Zeta’s source is precipitation evaporation, Zeta’s source is precipitation evaporation, zeta’s sink is a linear relaxation to zero.zeta’s sink is a linear relaxation to zero.
Entrainment epsilon depends on local pressure Entrainment epsilon depends on local pressure and on zeta, probability of undiluted and on zeta, probability of undiluted ascents at the current levelascents at the current level
14103 m 1310 m
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Results on the EUROCS diurnal cycle of deep conv. over landResults on the EUROCS diurnal cycle of deep conv. over land
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Results on the EUROCS diurnal cycle of deep conv. over landResults on the EUROCS diurnal cycle of deep conv. over land
Q2Q2ARPEGARPEG
EEoper oper
ARPEGEARPEGEV1 V1
Q2 CSRM Q2 CSRM MNHMNH
Q2Q2ARPEGEARPEGEhistoricalhistoricalentr.entr.
Piriou, Redelsperger, Geleyn, Lafore, Guichard, Subm. JAS 2006.
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Partly resolved convection: Luc GerardPartly resolved convection: Luc Gerard
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Partly resolved convection: Luc GerardPartly resolved convection: Luc Gerard
3MT:
To run in the « grey zone »To run in the « grey zone »
• A large scale condensation scheme based on A large scale condensation scheme based on Smith (1990).Smith (1990).
• A prognostic mass-flux scheme extended from A prognostic mass-flux scheme extended from Gerard and Geleyn (2005).Gerard and Geleyn (2005).
• 3MT equations, Piriou (2005).3MT equations, Piriou (2005).
• Microphysical routine derived from Lopez (2002).Microphysical routine derived from Lopez (2002).
• Prognostic mass-flux parameterization of a moist Prognostic mass-flux parameterization of a moist downdraft driven by evaporative cooling.downdraft driven by evaporative cooling.
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Partly resolved convection: Luc GerardPartly resolved convection: Luc Gerard
3MT (Modular Multiscale Microphysics and Transport Convective Scheme)3MT (Modular Multiscale Microphysics and Transport Convective Scheme)
Partly resolved convection: Luc GerardPartly resolved convection: Luc Gerard
FinFinFinFin
Flux-conservative Flux-conservative thermodynamic thermodynamic equationsequations
Flux-conservative thermodynamic equationsFlux-conservative thermodynamic equationsFlux-conservative thermodynamic equationsFlux-conservative thermodynamic equations
An equation framework, ready for An equation framework, ready for discretizationdiscretization
• Total-mass based framework, use of the Total-mass based framework, use of the full barycentric velocity as the vector of full barycentric velocity as the vector of advection.advection.
Even in full prognostic treatment of cloud Even in full prognostic treatment of cloud and prec. Processes, flux conservative and prec. Processes, flux conservative form of all relevant budgets.form of all relevant budgets.
Flux conservative form kept when going Flux conservative form kept when going from H-Prim. equ. To fully compressible from H-Prim. equ. To fully compressible system.system.
Catry, Geleyn, Tudor, Bénard, Trojakova, Catry, Geleyn, Tudor, Bénard, Trojakova, Tellus (2006) Tellus (2006)
Flux-conservative thermodynamic equationsFlux-conservative thermodynamic equationsFlux-conservative thermodynamic equationsFlux-conservative thermodynamic equations
Catry, Geleyn, Tudor, Bénard, Trojakova, Tellus (2006) Catry, Geleyn, Tudor, Bénard, Trojakova, Tellus (2006)
Increasing realism
Dark grey: unrecommended choices
FinFinFinFin
AROME developmentsAROME developments
1/ Testing the prototype1/ Testing the prototype
Prototype AROMEPrototype AROME
Source Yann Seity, Météo-France/CNRM GMAP 2006.Source Yann Seity, Météo-France/CNRM GMAP 2006.
22
MIDPYRSUDE
NORE
PARI
BRET
Domaines AROME configurés sur la FRANCE
MIDPYR depuis Juin 2005 + SUDE sept-dec 2005, NORE dec2005-avr2006, PARI mai-sept2006
FRAN
Source Yann Seity, Météo-France/CNRM GMAP 2006.Source Yann Seity, Météo-France/CNRM GMAP 2006.
13TU
Orages (22-05-2006)
Source Yann Seity, Météo-Source Yann Seity, Météo-France/CNRM GMAP France/CNRM GMAP 2006.2006.
FinFinFinFin
AROME developmentsAROME developments
2/ Subgrid-scale shallow 2/ Subgrid-scale shallow convection convection
wzt
Eddy diffusivity
zKw
)( uMw
Subgrid mixing:
uwM
Mass-flux
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
EDKF updraftprototype
LCL
uM
uu
χc
χf(χ)dχMt0
1
1χc
χ)f(χ)dχ(Mt
From Kain and Fritsch,1990
(surface fluxes)SURFEX
e
w'r'rr surft
ut
3/1
up
v
Lw'θ'g
CM surf
ref
u
e
w'θ'θθ surfl
ul
dn
u
L
MCE )1(
up
u
L
MCD )1(
From Lappen and Randall,2001
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
Rico : high resolution composite case
No shallow convection scheme
Explicit cloud under a strong inversion
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
Rico : high resolution composite case
EDKF (Pergaud, Malardel, Masson)with subgrid autoconversion
Rain specific content (g/kg)
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
AROME developmentsAROME developments
Subgrid-scale shallow convection: S. Malardel, V. Masson, J. Subgrid-scale shallow convection: S. Malardel, V. Masson, J.
PergaudPergaud
FinFinFinFin
ConclusionsConclusions
Conclusions / perspectivesConclusions / perspectivesConclusions / perspectivesConclusions / perspectives
• On-going efforts to develop unified On-going efforts to develop unified approaches: 3MT, grid-scale approaches: 3MT, grid-scale equations sets, microphysics, DDH equations sets, microphysics, DDH physico-dynamical diagnostics.physico-dynamical diagnostics.
• AROME prototype: developments AROME prototype: developments and validation under progress.and validation under progress.