OASIS Unified Interface and Examples of Applications

OASIS unified interface and examples of applications

Jennifer Brauch, Marcus Breil, David Byrne, Edouard Davin, Ha Hagemann, Eric Maisonnave, Stefan Weiher, Andreas Will

COSMO-CLM Assembly – 27.08.2013 Regional Climate System

Quelle: wiki.bildungsserver.de Vision from the science plan: Development of an earth system model to reduce the uncertainties of present day climates for the key quantities temperature and precipitation.

COSMO-CLM Assembly – 27.08.2013 Potential of Coupling

ECHAM

COSMO/CLM

CLM VEG3D

ROMS TRIM + NEMO CICE

COSMO-CLM Assembly – 27.08.2013 OASIS3 / OASIS3-MCT

OASIS3  2D coupling interface with temporal and spacial interpolation routines  Separate executable

OASIS3 – MCT (version 1.0)  MCT -> Model Coupling Toolkit (developed at MCS, Argonne National Lab)  3D coupling interface  Usage as module, no additional processors required

COSMO-CLM Assembly – 27.08.2013 Changes in the Code

Last Workhop in Cottbus, July 2013

 Model version: cosmo_4.8_clm19  Additions in lmorg.f90, environment.f90 etc

 Auxiliary files for definition of the OASIS interface (oas_cos_define.f90, etc)  Preprocessor options for OASIS3 or OASIS3-MCT  New namelist input for coupling ytype_lsm = terra, clmXX, veg3d ytype_oce = nooce, nemoO, trimI, romsO ytype_2wn = no2wn, echam

Vision: Interface will be in COSMO/CLM, all individual adaptions will be done in the auxiliary files or namelist

COSMO-CLM Assembly – 27.08.2013 COSMO/CLM - Veg3D (Marcus Breil, KIT)

 Veg3D is a SVAT developed at the Karlsruhe Institute of Technology (KIT)  Within the MiKlip project, a coupled version of Veg3D with COSMO/CLM will be used for decadal climate simulations  Status of the coupling:  Veg3D is coupled with COSMO_4.8_clm19 via the unified OASIS3-MCT interface and tested  Veg3D is coupled with COSMO_4.21_clm2 via OASIS3-MCT and tested → MiKlip model version  Cosmo/CLM → Veg3D: ps, T, qv, u and v, precipitation (Sum of prr_con, prr_gsp, prs_con, prs_gsp), lwd_s and short wave radiation (Sum of swdir_s, swdifd_s  Veg3D → Cosmo/CLM: soil temperature (t_s / t_g), qv_s, alb_rad, shfl_s and qvsflx).

→ Talk of Marcus Breil: Wednesday, 12:30 – 12:45, Room F42

COSMO-CLM Assembly – 27.08.2013 COSMO-CLM2 (Edouard Davin, ETH)

Coupling of COSMO/CLM and CLM (Community Land Model)

. Subroutine coupling: . COSMO-CLM coupled to Community Land Model 3.5 . Evaluation: Davin et al., Clim. Dyn. [2011]; Davin and Seneviratne, Biogeosciences [2012]; Lorenz et al., JGR [2012] . Currently used in various projects

. Coupling with OASIS3-MCT: . Upgrade to Community Land Model 4.0/4.5 . Still under testing

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 7 COSMO-CLM2 (Edouard Davin, ETH)

Variables exchanged

. COSMO/CLM  CLM: T, U and V wind components, specific water vapour content, height of first atmospheric level, surface pressure, direct shortwave downward radiation, diffuse shortwave downward radiation, longwave downward radiation, precipitation . CLM  COSMO/CLM: surface albedo, outgoing longwave radiation, latent and sensible heat fluxes, momentum fluxes

→ Talk of Edouard Davin: Wednesday, 9:30 – 9:45, Lecture Hall C14

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 8 Coupled Atmosphere-Ocean Project - Cosmo-Roms

David Byrne, Ivy Frenger, Lukas Papritz, Matthias Munnich and Nicolas Gruber

COSMO-CLM Assembly – 27.08.2013 Status:

 At ETH we have a working version of Cosmo 4.18 using Oasis3 to couple with our regional ocean model ROMS. We are currently using the coupled model to investigate air sea interaction over mesoscale eddies in the South Atlantic.

 Future plans are to upgrade to Oasis-MCT v2 and to update ROMS to have the same send and receive structure (variable names etc) as NEMO so we have a unified Ocean model interface for the UI in Cosmo- CLM.

→ Talk of David Byrne: Wednesday, 16:30 – 16:45, Lecture Hall C14

COSMO-CLM Assembly – 27.08.2013 COSMO/CLM + TRIM + CICE

Model system at HZG (Ha Hagemann and Burkhardt Rockel)

 Atmosphere model: cosmo4.8_clm19 with unified oasis3-mct interface  Ocean model: TRIMNP version 2.5  Sea ice model: CICE version 4.1 (included in TRIMNP)

Model system is running with the Unified Interface, more tests are necessary.

Future Plans:  Upgrade the interface to the new released version OASIS3-MCT2.0  Upgrade to the unified oasis3-mct interface UOI version with cosmo5.0  comparison with other coupled system of CCLM and other ocean models

→ Poster of Ha Hagemann: Wednesday, 15 - 16:30 , Atrium D floor

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 11 COSMO/CLM – NEMO

Model system at University of Frankfurt, BIKF and DWD Bodo Ahrens, Naveed Akhtar, Jennifer Brauch, Barbara Früh and Trang van Pham  Atmosphere model: cosmo4.8_clm19 with unified oasis3-mct interface  Ocean model: NEMO version 3.2 and 3.3 resp.  Sea ice model: LIM3(included in NEMO) Model system is running with the Unified Interface

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 12 COSMO/CLM – NEMO

Difference between coupled system and standalone atmosphere

Temp Precip

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 13 COSMO/CLM – NEMO

Future Plans:  Compare results of OASIS3 and OASIS3-MCT coupling  Upgrade the interface to the new released version OASIS3-MCT2.0  comparison with other coupled system of COSMO/CLM

→ Poster of Jennifer Brauch: Wednesday, 15 - 16:30 , Atrium D floor

COSMO-CLM Assembly – 27.08.2013

Edouard Davin 14 COSMO/CLM and ECHAM6/MPIOM

Two-way-nesting done at BTU Cottus by Stefan Weiher, Ingo Kirchner, Markus Thürkow and Andreas Will

Characteristics of the coupling

 Exchange of fields every ECHAM time step, that is, every 10 min (at T63L47)

 Fields from ECHAM to CCLM (lateral and surface boundary conditions)

 2-dim.: PS, FIS, W_SNOW, T_S

 Vegetation and ozone fields need to be read from file

 3-dim.: T, U, V, QV, QC, QI

 Fields from CCLM to ECHAM

 3-dim.: T, U, V, QV, QC, QI

 Fields from MPIOM to CCLM (planned)

 SST

COSMO-CLM Assembly – 27.08.2013 COSMO/CLM and ECHAM6/MPIOM

Additional module, src_2wn.f90, needed for this coupling mainly contains

 Rountines for adapting surface pressure to the other model's orography

 Routines for vertically interpolating 3-dim. atmospheric fields with tension splines (adapted from subroutines src_vert_interpol.f90 and src_vert_inter_lm.f90 from INT2LM)

Status of model development

 Successfully conducted a one-month test simulation of an online one- way nesting

 Two-way nesting doesn't run stably yet; debugging is going on; however, the model development on both sides, ECHAM as well as CCLM, isn't finished yet (see e.g. calculation of divergence and vorticity)

 Single thread and multi thread comparison on Blizzard

→ Talk of Andreas Will: Wednesday, 11:45 – 12:00, Room F42

COSMO-CLM Assembly – 27.08.2013 Future Plans

 Testing/Debugging of Unified Interface for individual applications  Follow the coding standard for the official release

→ Meeting of PG OASIS: Thursday, 13:30 -15, Room CHN G46

 Everyone interested in coupling with OASIS is welcome!

COSMO-CLM Assembly – 27.08.2013 COSMO-CLM2 (Edouard Davin, ETH)

Improvement in simulated climate variability and extremes

Skill score for daily maximum summer temperature based on E-OBS

Lorenz et al., [2012]

→ Talk of Edouard Davin: Wednesday, 9:30 – 9:45, Lecture Hall C14

COSMO-CLM Assembly – 27.08.2013 Oceanic mesoscale eddies leave a distinct imprint on the overlying atmosphere, impacting: • Wind • Cloud Fraction • Rain Rate • ... I. Frenger, N. Gruber, R. Knutti and M. Münnich, Nat. Geoscience, (2013) Coupled model results agree very well with observational findings for the changes to atmospheric quantities. Does the ocean respond to atmospheric anomalies? First results from the Coupled model show an intensification of mesoscale eddies compared with the Standalone Ocean Model forced without wind stress anomalies.

COSMO-CLM Assembly – 27.08.2013 Performance results on Blizzard

Single-threading configuration Multi-threading configuration

Figure: courtesy of Same performances but E. Maisonnave, CERFACS, two-times less expensive Toulouse COSMO-CLM Assembly – 27.08.2013