On the use of the GPCI for the tuning and the validation of the new ARPEGE GCM’s physics
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Transcript of On the use of the GPCI for the tuning and the validation of the new ARPEGE GCM’s physics
On the use of the GPCI for the tuning and the
validation of the new ARPEGE GCM’s physics
On the use of the GPCI for the tuning and the
validation of the new ARPEGE GCM’s physics
GCSS-GPCI / BLCL-RICO 18-21 sept 2006
P. Marquet, CNRM. Toulouse. Météo-France.
(20-sept-2006)
+ ARPEGE CLIMATE & N.W.P. team + Meso-Scale CNRM team
+ ENM (School of Met.) + CERFACS + IPSL-LMD …
IntroductionIntroduction The aim of the study :
Run the French Météo-France (CNRM) ARPEGE-CLIMAT GCM (T63-L31) for GEWEX-PCI (STD / NEW1 / NEW2) …
Send the results for the inter-comparison : done / Joao …
+ Impact studies : Test of STANDARD versus NEW physics (Turb, Conv, -Phys)
Comparisons with the previous EPCI ; with the AMMA-CI…
Impact of the explicit Top PBL entrainment ?
Comparisons with SCM cases ?
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 / Germy 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.
Sc/St
Cu
CbEquator
1st Cross
Section
2nd C
ross
Sec
tion
U.S.A
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
GCM runs Arpege / V4.5 : 2 years : 1998 and 2003
10 days of spin-up in June (lost) + JJA every 3 h
NEW1 : TKE-GY + -phys-GY + CVGY + LPBLE / or not
NEW2 : TKE-CBR + LOPEZ + CVGY + LPBLE / or not
(a) I.W.V.
EPCI = Eurocs Pacific Cross-section IntercomparisonEPCI = Eurocs Pacific Cross-section Intercomparison
(c) C. C.
(diag)
(b) L.W.P.
(diag)
Versus : SCM / EUROCS Cumulus (L40)Versus : SCM / EUROCS Cumulus (L40)
EPCI = Eurocs Pacific Cross-section IntercomparisonEPCI = Eurocs Pacific Cross-section Intercomparison
Arpege MPI ECMWF
JMA MetO RACMO
HIRLAM KFHIRLAM ST ERA (3-6h)
Cloud Cover
EPCI = Eurocs Pacific Cross-section IntercomparisonEPCI = Eurocs Pacific Cross-section Intercomparison
ARPEGE-V3
ANA-ECMWF Met-Office
Cloud Cover
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
ANA-ECMWF
ARPEGE-V3 ARP-V4-STD
ARP-NEW2
+ LPBLE
Cloud Cover
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
Cloud Cover
More realistic resultswith NEW2 + LPBLE :Top-PBL Entrainment = OK RICO ?
ARP-NEW2
+ LPBLE
ARP-NEW2
ANA-ECMWF
1000
800
900
RICO L31 (GCM)
Cloud Cover
NEW2_noent NEW2
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
ARP-STD
Athens (2005) : Pb OMEGA (Pa/s) !!
ARP-NEW2
More realistic results
with NEW2 (+ LPBLE)
ARP-NEW2
+ LPBLE
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
K6 = ARP-NEW2
V4 = ARP-STD<q_vap>
K4 = ARP-NEW2 + LPBLE
I.W.V.
EPCI
No more >0 biases with NEW2…
(b) .W.P.
but a <0 one !! RICO ?
ARP-STD
ARP-NEW2+ LPBLE
GPCI
NEW2
NEW2_noent [ T ] & [ q_v ] => [ RH ] ?
RICO L31 (GCM) RELAT. HUM.
STD
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
K6 = ARP-NEW2
V4 = ARP-STDL.W.P.
K4 = ARP-NEW2 + LPBLE
L.W.P.
EPCI
NEW2 : better than STD-V4
NEW2 with LPBLE even better…
ARP-STD
ARP-NEW2+ LPBLE
ARP-NEW2
GPCI
ARP-NEW2+ LPBLE
GPCI = Gewex Pacific Cross-section IntercomparisonGPCI = Gewex Pacific Cross-section Intercomparison
K6 = ARP-NEW2
V4 = ARP-STDCloud Cover Less >0 biases with NEW2
K4 = ARP-NEW2 + LPBLE
C. C.
Less <0 biases with NEW2 + LBLPE
EPCI
ARP-STD
ARP-NEW2+ LPBLE
GPCI
AMMA = African Monsoon Multidisciplinary AnalysisAMMA = African Monsoon Multidisciplinary AnalysisCROSS :
20S-40Naverage over : 10W-10E
MAP-2D : thepoints located within: 10S-30N 35W-30E
Cross-Section AMMA Cross-Section AMMA GCM runs Arpege / V4.5 : CNRM/EAC + ENM/UFR 2 years : 2000 (dry) and 2003 (moist)
+ one year (lost) of spin-up (1999 et 2002)
NEW1 : TKE-GY + -phys-GY + CVGY + LPBLE / or not
NEW2 : TKE-CBR + LOPEZ + CVGY + LPBLE / or not
SST : Reynolds OI-v2 (daily interpolations)
Altitude + Surf : a standard ARPEGE state (not ERA40)
Aerosols : FMR(15) + Tegen < GMAP < CEPMMT
Output : t=3h / NetCdF (similar to EPCI/GPCI)
3D Simulations + transect : impact of the Top PBL l’entrainment. “NEW2” Prognostic Physics : TKE-CBR + Lopez + CVs-GY (1)3D Simulations + transect : impact of the Top PBL l’entrainment. “NEW2” Prognostic Physics : TKE-CBR + Lopez + CVs-GY (1)
Better simulations of SC/Cu over the Golf of Guynea if LPBLE=.TRUE. … more low level clouds, at least… but ?
LPBLE = F LPBLE = T
3D Simulations + transect : impact of the Top PBL l’entrainment. “NEW2” Prognostic Physics : TKE-CBR + Lopez + CVs-GY (2)3D Simulations + transect : impact of the Top PBL l’entrainment. “NEW2” Prognostic Physics : TKE-CBR + Lopez + CVs-GY (2)
More realistic indeed with LPBLE=TRUE
“Omega” :2000-06
Re-analysisNMC :
LPBLE = TLPBLE = F
ConclusionsConclusionsResults
An (internal) validation of the ARPEGE physics… An improvement with Top PBL entr. and with the new
convection and the new micro-physics…
A real interest for the GPCI ; but jointly with SCM and GCM global analyses : the EUROCS’ method…
Problems with the diurnal cycle ?
Validation of Cloud Cover (Obs. / Ana.) ? => Radiation !
Results for “T”, “q_v” and “q_l”… but for the wind ? for R.H. ?
Questions :