Impact of new ARPEGE physics on RICO case
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Impact of new ARPEGE physics on RICO case Impact of new ARPEGE physics on RICO case
(19-sept-2006)
GCSS-GPCI / BLCL-RICO 18-21 sept 2006
P. Marquet, CNRM. Toulouse. Météo-France.
+ ARPEGE CLIMATE & N.W.P. team + Meso-Scale CNRM team
+ ENM (School of Met.) + CERFACS + IPSL-LMD …
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IntroductionIntroduction First aim of the study :
Run the French Météo-France (CNRM) ARPEGE-CLIMAT SCM for the new RICO_composite (L80 and L31) …
Send the results for the inter-comparison : done / Pier …
+ 4 Impact studies : Test STANDARD versus NEW physics (Turb, Conv, -Phys) ?
Test of ( L80 / t = 5 mn ) versus ( L31 / t = 15 mn ) ?
Impact of the explicit Top PBL entrainment ?
Impact of the (Dry)-thermals ?
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The Climate ARPEGE physics : STANDARD / NEW1 / NEW2The Climate ARPEGE physics : STANDARD / NEW1 / NEW2
STANDARD / V3-V4 NEW1 / Mixed NEW2 / IPCC / full-Diagnostic Diag+Prog full-Prognostic
TURB DIAG. Mellor-Yamada DIAG. M&Y PROGN. / C.B.R. e / t = 0 e / t = 0 e / t = P + Dif – Dis
moist PDF / Bougeault moist PDF / moist PDF / Bougeault Bougeault / Bechtold
Micro-Phys DIAG. PROGN. PROGN.Smith/Kessler Smith/Kessler Bulk - Lopezq_liq / q_ice q_liq / q_ice q_cloud / q_rain
Shallow part in TURB , but why ? Mass-Flux Mass-FluxConvection + Mass-Flux Bougeault ? CAPE / Gueremy CAPE / Gueremy
Deep Mass-Flux / Bougeault Mass-Flux Mass-FluxConvection Convergence of HU CAPE / Gueremy CAPE / Gueremy
Top-PBL NO YES YESEntrainment Grenier & Breth. Grenier & Breth.
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Validation of N_low : GCM (T63-L31)Validation of N_low : GCM (T63-L31)
Strato Cu<- STD
(DJF+JJA)N_low - ISCCP
Strato Cu<- NEW
Lopez + CV_GY
+ TKE-CBR
+ Ent_PBL
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The NEW2 turbulent scheme : TKE-CBRThe NEW2 turbulent scheme : TKE-CBR
TKE-C.B.R. (2000) + B.L. (1989) for Mixing Length + F2 & 3 / Bougeault (1982) & Bechtold (1995) ; EUROCS : GCM <-> EPCI+GPCI+ACI <-> SCM
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Micro-physics : pdf
TKE-C.B.R. (2000) + B.L. (1989) + F2 & 3 / Bougeault (1982) & Bechtold (1995)
Variance of q_cloud : PDF Variance of q_cloud : PDF
Sc
Cu
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An Explicit Top-PBL EntrainmentAn Explicit Top-PBL Entrainment
Grenier (ARPEGE)
Vertical Diffusion of theBetts variables : _l and q_t
( A1 = 0.16 )( A2 = 0.0 )
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SCM / EUROCS_ARM_Cu (Lenderink)SCM / EUROCS_ARM_Cu (Lenderink) q_cloud
ARP-NEW2 / L19
+ Top PBL ent.
LES-KNMI
ARP-NEW2 / L19
ARP-STD / L19
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SCM / EUROCS_ARM_Cu (Lenderink)SCM / EUROCS_ARM_Cu (Lenderink) THETA (L19)
ARP-NEW2 +Top PBL ent.
LES-KNMI
ARP-NEW2
ARP-STD
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Ayotte 24SC / L96Ayotte 24SC / L96
Hourdin, Couvreux,
Menut, J.A.S., 2002.
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And for RICO ?And for RICO ?
Impact studies :
Test STANDARD versus NEW physics : STD versus NEW2
L80 / t = 5 mn ; L31 / t = 15 mn
Impact of the explicit Top PBL entrainment : NEW2_noent
Impact of the (Dry)-thermals : NEW2_noDTh
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RICO L80 / THETA_l
NEW2_noent
NEW2_noDTh
STD NEW2
STD instable ; NEW2 better, But with a drift z>2km ?a –0.5 K bias in the PBL ?a very small impact of « entr. »a large impact of Dry Thermals
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RICO L31 / THETA_l
NEW2_noent
NEW2_noDTh
STD NEW2
STD noisy ; NEW2 better, with a smaller drift z>2km ! ?a –0.5 K bias in the PBL ?a greater impact of « entr. »and larger impact of Dry Thermals
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RICO L80 / Zonal Wind
STD NEW2 NEW2_noent
NEW2_noDTh
STD noisy ; NEW2 better, But why these oscillations ?A small impact of « ent »A greater impact of Dry Thermals
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RICO L80 / Cloud Cover
NEW2_noent
NEW2_noDTh
STD NEW2
STD very noisy !! NEW2 better, Cloud Base and Maxi OK, Drift of Cloud top <-> theta ?A small impact of « ent »A large impact of Dry ThermalsWhat about the values of C.C. ??
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L80
L31
LES KNMI
RICO / Cloud Cover Average 24h - 30h
STD very noisy up to 3.5 km !! NEW2 better L80 : from 0.5 to 2.5 km : OK ; the good shapeL31 : too deep cloud 0.2 to 4 km !!L31 : Large impact of Top PBL entr. !What about the values of C.C. ??
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RICO / Cloud Content Average 24h - 30h
L80
L31
LES KNMI
SAME as for CLOUD-COVER… Except that values compare to LES…STD very noisy up to 3.5 km !! NEW2 better L80 : from 0.5 to 2.5 km : OK ; the good shapeL31 : too deep cloud 0.2 to 4 km !!L31 : Large impact of Top PBL entr. !
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L80
LES KNMI
RICO / <w’’l> Average 24h - 30h
W/m2
K*(m/s)
W/m2
L31
NEW2 L80 realistic… except close to the surface !!
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NEW2
LH (W/m2)L80
NEW2 L80 Cloud Cover
NEW2
L80 Precip. mm/day
NEW2 L80 LWP
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L80 LES BOMEX
RICO / TKEAverage 24h - 30h
W/m2 m2/s2
W/m2
L31
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ConclusionsConclusions Mainly, questions !…
Apart from the (internal) validation of the ARPEGE physics… Why this drift above 2.5 km ? smaller with L31 /t =15 mn : w ?
Are the oscillations for (u,v) Wind observed by others ?
How to compare Precip & C.C. to LES or Obs. ? => Radiation !
A real interest for this RICO case ! “Composite” -> “Long_Run” ? RICO GPCI & AMMA-CI (next talk)… Continue EUROCS’ method…
A deep impact of top-PBL/TURB shallow convection
Small for EUROCS- Cu / large for RICO… Precip ?
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RICO L31 / Cloud Cover
NEW2_noent
NEW2_noDTh
STD
NEW2
STD very noisy up to 4 km !! NEW2 better, But worse than L31 (clud base ?)A large impact of « ent »And larger impact of Dry Thermals
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L80
L31
LES KNMI
RICO / <w’q’t> Average 24h - 30h
W/m2
W/m2
(g/kg)*(m/s)
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L80 LES KNMI
RICO / <w’’vl> Average 24h - 30h
W/m2 K*(m/s)
W/m2
L31
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RICO SH (W/m2)
STD NEW2
STD NEW2
L80
L31 L31
L80
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STD NEW2
STD NEW2
RICO LH (W/m2)
L80
L31 L31
L80
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RICO Cloud Cover
STD
NEW2 L31 L31
STD
NEW2
L80
L80
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RICO Precip.
STD
NEW2
STD NEW2
L31
L80 L80
L31
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RICO LWP
STD
NEW2 L31 L31
STD
NEW2 L80 L80