© crown copyright met office cosp: status and cfmip-2 experiments a. bodas-salcedo cfmip/gcss...

© Crown copyright Met Office

COSP: status and CFMIP-2 experimentsA. Bodas-Salcedo

CFMIP/GCSS meeting, Vancouver, 8-12 June 2009


Acknowledgements

• M. J. Webb (MOHC)• S. Bony, H. Chepfer, J.-L. Dufresne (LMD/IPSL)• S. Klein, Y. Zhang (PCMDI)• R. Marchand (U. Washington)• J. Haynes (Monash University)


COSP(CFMIP Observational Simulator Package)

•Software aimed to facilitate the exploitation of satellite data in numerical models•New modules can be plugged in without the need of interfacing•Transform model variables to obs, avoiding ambiguity in retrievals

COSP MAIN

SCOPS

Sub-grid cloud generator

SG PRECIP

Sub-grid precip generator

COSP SUB-GRID

CLOUDSAT

CALIPSO

SUMMARY STATISTICS

ISCCP

MISR

Download from http://www.cfmip.net/


Output diagnostics

CloudSat•Radar reflectivity in each subcolumn•Height-reflectivity histograms

CALIPSO•Lidar total backscatter (532 nm)•Lidar molecular backscatter•Height-scattering ratio histograms•Low-level cloud fraction (CTP>680 hPa)•Mid-levlel cloud fraction (440<CTP<680 hPa)•High-level cloud fraction (CTP<440 hPa)•3D Cloud fraction•Total cloud fraction

MISR,PARASOL and combined•PARASOL mono-directional reflectance•MISR CTH-Tau histograms •Total cloud fraction from CALIPSO&CloudSat•3D cloud fraction as seen from CALIPSO but not CloudSat

ISCCP•Mean cloud albedo•Cloud optical depth in each subcoumn•Mean cloud top pressure•Mean 10.5 micron brightness temperature•Mean clear-sky 10.5 micron brightness temperature•Mean cloud optical depth•Cloud top pressure in each subcolumn•CTP-tau histograms•Total cloud fraction


Examples


MetUM v CloudSat

(Bodas-Salcedo et al., JGR, 2008)

Tropical warm pool


LMDZ4 v CALIOP

(Chepfer et al., GRL, 2008)


COSP v1.x

• COSP v1.x will be used for CFMIP-2 experiments

• v1.0 was released on 6th April 2009

•It contains all the capabilities

• v1.1 was released on 22nd May 2009

•Several bug fixes

•Namelists with standard configuration for CFMIP-2

• v1.2 to be released soon

•Final agreement on output names for CMIP5

•Additional bug fixes

•MODIS could be included as an optional module

•CMOR2?


COSP v2.0

• New instruments

• RTTOV. Fast RT code for IR and PMW (Optional)

• MODIS. Daytime only CF, CTP, size, and OT All, liquid and ice Joint CTP/OT histogram Matching Level3 product to be produced by NASA

• TRMM PR sf-conv precip

• Others…

• Compatibility with CMOR 2

• New diagnostics

• Expected to be released by Jan/Feb 2009


CFMIP-2 experiments

6.6Patterned

SSTs

6.8Uniform +4K

SSTs

6.54xCO2

Hansen exp.

3.3CONTROLAMIP SSTs

(Hansen et al., 2005)

Atmosphere-only runs 1979-2008

SSTs at 4xCO2 in 1% run

More details in the CFMIP-2 summary (www.cfmip.net) and in Taylor et al., “A summary of CMIP5 experiment design”, (2008).

+ AMIP

Ensemble-mean SSTs pattern 4xCO2 in 1% run

http://www.cfmip.net/


COSP Diagnostics

Long-term1979 2007 2008 2009

Short-term

LT

ST

•Daily and monthly diagnostics

•ISCCP•Total cloud fraction, albedo, CTP, CTP-TAU histograms

•CALIPSO/PARASOL•Low/mid/high/total CF, 3D CF, reflectance (ocean only)

•Curtain and monthly gridded diagnostics

•CloudSat reflectivity CFADs

•CALIPSO/PARASOL•As in LT + scattering ratio CFAD and cloud fraction by CALIPSO

INPUT OUTPUT

INPUT OUTPUT

Inst.

Monthly

(Also requested in many other CFMIP-2 experiments)


Short time series(Curtain output)

INPUT 1D OUTPUT 1D

InstantaneousCOSP

Gridding and averaging

Monthly

Model output 2D, 3 hourly

Sub-sampling

We will provide:•CloudSat track for 2007

•Gregorian calendar•360 day calendar

•Sampling program (?)

CFMIP2 diagnostics

T T+3

T-1.5 T-1.5T+1.5

T T+3T+1.5

OBS

OBS

MODEL


Observations

• ISCCP

• GOCCP (H. Chepfer’s talk)

• CloudSat CFADs

• Gridded CFADs from 2B-GEOPROF reflectivities

• We have requested this product to be produced by the CloudSat team

• Program to be distributed soon so that each modelling centre can build them at their own model resolution, or

• They can be downloaded from Roj Marchand’s web page:

http://www.atmos.washington.edu/~roj/CloudSat_Monthly_Reflectivity_Height_histograms/


Summary

• Description of COSP

• Current status and short-term plans (v1.x)

• Long-term plans (v2 and beyond)

• CFMIP2 experiments and COSP diagnostics

• Visit www.cfmip.net and subscribe to COSP user mailing list to be up to date

subscribe cosp-user <mail_address> to [email protected]

http://www.cfmip.net/


Thanks!

© crown copyright met office cosp: status and cfmip-2 experiments a. bodas-salcedo cfmip/gcss...

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