1. The TM5 atmospheric chemistry module in EC-Earth Twan van Noije

2. EC-Earth consortium
EC-Earth is an ESM developed by a consortium of European
weather services, research institutes, and computing centres:
Netherlands: KNMI, WUR, IMAU, Utrecht U., VU Amsterdam
Sweden: SMHI, Stockholm U., Lund U.
Denmark: DMI
Norway: NMI
Ireland: Met Éireann, U. College Dublin, ICHEC
Spain: AEMet, Barcelona SC
Portugal: IM, U. Lisbon
Italy: ICTP
Switzerland: ETH Zürich
Belgium: UC Leuven
Observer: ECMWF

3. Working Group on Atmospheric Chemistry and Aerosols
KNMI (myself, Peter van Velthoven)
Wageningen Univ. (Maarten Krol, Laurens Ganzeveld)
ETH Zürich (Ulrike Lohmann, Trude Storelvmo, chair)
SMHI (Michael Kahnert, V. Foltescu)
Stockholm Univ. (Annica Ekman)
Lund Univ. (Almut Arneth, Guy Schurgers)

4. Modules OASIS Integrated Forecasting System (IFS)
Atmospheric chemistry:
TM5
Vegetation:
Lund-Potsdam-Jena model
(LPJ / LPJ-GUESS)
OASIS
Louvain-la-Neuve sea-ice model (LIM)
Land surface: H-TESSEL
GCM: OPA
GCM: ECMWF
Nucleaus for European Modelling
of the Ocean
Integrated Forecasting System (IFS)
T159 (~ 1.125o) or T95 (~ 1.875o)
L62 (<5 hPa) or L40 (<10 hPa)
ORCA1 (1o) or ORCA2 (2o) grid

5. Joint Code Development
A new baseline version is released ~ once every half year:
PrepIFS ECMWF
Standalone version for distribution
Each development team implements and tests their extension in the latest baseline version.
Extensions that pass the EC-Earth test suite will become part of the next baseline version. The extensions are tested for acceptance by the EC-Earth system manager.
New extensions are integrated (one by one) into the baseline system and the new baseline version is prepared for distribution by the EC-Earth system manager. The EC-Earth test suite is extended with the test suites of all accepted extensions.
Version management:
ECMWF
If other systems are used by partners, a tar archive of the source code can be merged into the next Perforce baseline version.

6. Current and Next Release
Integrated Forecasting System (IFS)
Cycle 31r1 (with modifications) → Cycle 33r1
Atmospheric chemistry:
TM5
GCM: ECMWF
Land surface: H-TESSEL
OASIS v3
Nucleaus for European Modelling
of the Ocean
v2 → v3
GCM: OPA
Louvain-la-Neuve sea-ice model (LIM)

7. TM5 in EC-Earth Current version: Second phase (beyond AR5):
Tropospheric chemistry with modal aerosol scheme and linearized stratospheric ozone chemistry
Natural emissions parameterized; CH4 concentrations prescribed at the surface
Radiative forcing based on simulated O3, CH4, and aerosols
Second phase (beyond AR5):
Stratospheric-tropospheric chemistry
Improved stratospheric water vapor source from oxidation of simulated methane (and hydrogen)
CH4 emissions from wetlands parameterized
Radiative forcing based on simulated N2O and halocarbon species (CFC-11, CFC-12, CFC-113, CCl4, etc.) as well

8. TM5 extensions TM5 has recently been extended with:
Online emission routine for isoprene (MEGAN) and terpenes
Online emission routine for soil NOx (Yienger and Levy, 1995)
The Cariolle scheme (Cariolle and Teyssèdre, 2007)
The M7 aerosol scheme (Vignati et al., 2004)
M7 aerosol optics
Planned before end 2009:
Online emission routine for mineral dust

9. Online coupling with OASIS3
IFS
TM5
meteo
soil+vegetation
parameters
concentrations
aerosol optical fields

10. Synchronisation Meteo exchanged @ end coupling interval: IFS TM5 t=0
t=Δt (6h or 3h)
time
Meteo end coupling interval:
Time averaged fields
Surface end: linearly interpolated in TM5
Other instantaneous middle
IFS restart file
IFS
TM5
TM5 restart file, incl. surface pressure

11. M7 mass and number concentrations
Feedback to IFS
TM5
IFS
Cloud-aerosol
scheme
McRad
O3, CH4 concentrations
Optics code
M7 optical fields M7
M7 mass and number concentrations
Interfaces to McRad and cloud scheme to be included in next release (v3) based on IFS cy33
For performance optimization we intend to use pseudo-parallel exchange on a field-by-field basis (latest OASIS3 version)

12. Coupling with DGVM IFS TM5 LPJ -GUESS meteo soil parameters
concentrations
deposition fluxes
vegetation parameters
CH4 emissions from wetlands
biogenic VOC emissions
fire emissions (SPITFIRE)
allows e.g. to include O3 indirect forcing by reduced CO2 uptake
LPJ
-GUESS