Copernicus Atmosphere Monitoring Service CAMS General Assembly, Athens, 14- 16 June 2016 Anna Agusti Panareda, Samuel Remy, Vincent Huijnen, J.J-Morcrette, Olaf Stein, Joaquim Arteta, Simon Chabrillat, Johannes Flemming & Angela Benedetti, Antje Inness, Sebastien Massart, Richard Engelen as C-IFS: How are developments integrated
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Copernicus Atmosphere Monitoring Service
CAMS General Assembly, Athens, 14-16 June 2016
Anna Agusti Panareda, Samuel Remy, Vincent Huijnen, J.J-Morcrette, Olaf Stein, Joaquim Arteta, Simon Chabrillat, Johannes Flemming & Angela Benedetti, Antje Inness, Sebastien Massart, Richard Engelen as well as all contributors to IFS and C-IFS
C-IFS: How are developments integrated
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IFS : Integrated Forecasting System of ECMWF
A very good NWP forecast and data assimilation model
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10th anniversary of IFS1997
IFS : Integrated Forecasting System of ECMWF
A complex model system for forecast and assimilation
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Adding composition to IFS : Composition -IFS
• In GEMS project:• Coupled system IFS-MOZART for chemistry
• GHG and aerosol on-line (integrated) in
the IFS• MACC I-III: chemistry on-line in IFS
• Chemistry - IFS (2009)• Renamed to Composition –IFS: all
composition aspects • Composition – IFS : global production system
in CAMS at ECMWF
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Integration of chemistry & aerosol modules in IFS
Dynamics & Physics
Chemistry
ctm
Dynamics & Physics
Transport & Chemistry
oasis4
oasis4
oasis4
IFS IFS CTM
Feedback Flow
Coupled SystemFeedback: slowFlexibility: high
Integrated System Feedback: fast Flexibility: low
Coupled SystemIFS- MOZART3 / TM5
C-IFSOn-line Integration
Flemming et al. 2009
Flexible but
very un-efficient
Fast, consistent
but higher
coding effort
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Composition – IFS : multiple schemes
Composition –IFS
MOZART chemistry
Cariolle Strat. O3
CO2 & CH4
GLOMAP aerosol
MOCAGE chemistry
CAMS Procurement
Open IFS Interface
BASCOE stratospheric
chemistry
TM5 (CB05) chemistry
MACC (LMDz) aerosol
BMS Strat. O3
MACC III heritage
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Benefits for CAMS using C-IFS• IFS is the best NWP model on the planet • IFS is a very efficient global model
• Operational IFS resolution is currently 9 km globally
• CAMS o-suite resolution is 40 km globally • IFS data assimilation (4D-VAR, ENS) used for
composition• Using 4D-Var algorithm (Ensemmble DA)• Infra structure to process assimilated
observations
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Benefits of high resolution modelMid-tropospheric CH4 [ppb] at 450 hPa
Low resolution FC (80 km, L60) High resolution FC (16 km, L137)
Anna Agusti-Panareda
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Challenges to use C- IFS for CAMS • Adaptation of data assimilation system to
specifics of composition field and observations
• IFS advection does not formally conserve mass • Global mass fixers implemented
• Link CAMS development with ongoing IFS development• 2-3 new cycles each year• Reproducibility of older cycles• IFS coding standards
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Towards better integration between C-IFS Components • Between Chemistry, Aerosols and GHG
modules• Secondary aerosol formation based on
chemistry• Photolysis and surface chemistry
modulation by aerosol • Unified modelling of methane in Chemistry
and GHG• Code harmonisation
• Composition on NWP (and back !!) • Aerosol in radiation • Ozone in radiation• Land surface and fluxes (emissions and
deposition)
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CAMS ozone fields in IFS radiation scheme I
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CAMS ozone fields in IFS radiation scheme II
New CAMS Ozone climatology
used in next IFS cycle
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How are C-IFS developments by CAMS partners integrated …
with a CAMS theme:Skiron (NW) distributes the ashes
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How are C-IFS developments integrated … 1. Contributing partner (or ECMWF):
• Testing (Test A) of individual model development • Delivery to ECMWF/CAMS
2. CAMS-ECMWF Section:• Integrate development in CAMS branch • Testing (Test B) of all integrated model improvements• Submit to ECMWF RD IFS section for ECMWF cycle upgrade
3. ECMWF RD IFS group• Merge new cycle from all ECMWF contributions
4. Forecast Department Copernicus section: • Run experimental CAMS suite (e-suite) and tested by VAL
5. Forecast Department Copernicus section:• Run operational CAMS suite (o-suite)
• Each of the steps can take 1-3 month so that it takes up to a year month from model update to implementation in o-suite
• Time line of ECMWF cycle upgrades will be announced to CAMS partners well in advance