© crown copyright met office cosp: status and cfmip-2 experiments a. bodas-salcedo cfmip/gcss...
Post on 21-Dec-2015
214 views
TRANSCRIPT
© Crown copyright Met Office
COSP: status and CFMIP-2 experimentsA. Bodas-Salcedo
CFMIP/GCSS meeting, Vancouver, 8-12 June 2009
© Crown copyright Met Office
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)
© Crown copyright Met Office
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/
© Crown copyright Met Office
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
© Crown copyright Met Office
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?
© Crown copyright Met Office
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
© Crown copyright Met Office
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
© Crown copyright Met Office
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)
© Crown copyright Met Office
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
© Crown copyright Met Office
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/
© Crown copyright Met Office
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]