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)


Arpege MPI ECMWF

JMA MetO RACMO

HIRLAM KFHIRLAM ST ERA (3-6h)

Cloud Cover


ARPEGE-V3

ANA-ECMWF Met-Office

Cloud Cover


ANA-ECMWF

ARPEGE-V3 ARP-V4-STD

ARP-NEW2

+ LPBLE

Cloud Cover


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


ARP-STD

Athens (2005) : Pb OMEGA (Pa/s) !!

ARP-NEW2

More realistic results

with NEW2 (+ LPBLE)

ARP-NEW2

+ LPBLE


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


K6 = ARP-NEW2

V4 = ARP-STDL.W.P.


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


K6 = ARP-NEW2

V4 = ARP-STDCloud Cover Less >0 biases with NEW2


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 :

On the use of the GPCI for the tuning and the validation of the new ARPEGE GCM’s physics

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