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COSMO-CLM: towards a regional climate system model

COSMO-CLM: towards a regional climate system model. Jennifer Brauch. Overview COSMO-CLM. COSMO-CLM TERRA. COSMO-CLM: COSMoooooooooO model in Climate Mode Non-hydrostatic regional climate model developed by the CLM-Community COSMO-CLM has the soil-vegetation model TERRA included

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COSMO-CLM: towards a regional climate system model

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  1. COSMO-CLM: towards a regional climate system model Jennifer Brauch

  2. Overview COSMO-CLM COSMO-CLM TERRA • COSMO-CLM: COSMoooooooooO model in Climate Mode • Non-hydrostatic regional climate model developed by the CLM-Community • COSMO-CLM has the soil-vegetation model TERRA included • COSMO-CLM has the extra module “ART” to treat secondary aerosols, directly emitted components like soot, mineral dust, sea salt and biological material as pollen. • COSMO-CLM has interfaces for the couplers MESSy and OASIS3 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  3. 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  4. 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  5. Regional Climate System Vision from the CLM - Community science plan: “Development of an earth system model to reduce the uncertainties of present day climates for the key quantities temperature and precipitation” 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  6. COSMO-CLM + Veg3D COSMO-CLM • Veg3D is a SVAT developed at the Karlsruhe Institute of Technology (KIT) • Coupled system of COSMO-CLM and Veg3D developed within the MiKlip project, to be used for decadal climate simulations VEG3D → Marcus Breil 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  7. COSMO-CLM • Investigation of air sea interaction over mesoscale eddies in the South Atlantic • I. Frenger, N. Gruber, R. Knutti and M. Münnich, Nat. Geosc., (2013) ROMS → David Byrne, Ivy Frenger, Lukas Papritz, Matthias Munnich and Nicolas Gruber 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  8. COSMO-CLM+ TRIM + CICE COSMO-CLM • Developmentof the online coupled model system COSTRICE (atmosphere: COSMO-CLM; ocean: TRIMNP; seaice: CICE) • Evaluation: H.T.M. Ho et al ., GMD [2012] TRIM CICE → Ha Hagemann and Burkhardt Rockel 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  9. COSMO-CLM COSMO-CLM2 • 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: • CLM and OASIS3-MCT need the same MCT library • Both MCT libraries run parallel CLM → Edouard Davin (ETH) and Eric Maisonnave (CERFACS) 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  10. COSMO-CLM2 Improvement in simulated climate variability and extremes Summer average for 2-m temperature Davin et al., [2011] 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  11. COSMO-CLM+ CLM + PARFLOW COSMO-CLM CLM PARFLOW • COSMO-CLM coupled to Community Land Model 3.5 and PARFLOW • Overview: Gasper et al., GMD [2014] → F. Gasper, K. Goergen, S. Kollet, P. Shrestha, M. Sulis, J. Rihani and M. Geimer 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  12. COSMO-CLM • Coupling of COSMO-CLM - Europe • With NEMO_MED12 for the Mediterranean Sea • With NEMO_Nordic for North and Baltic Seas NEMO → Jennifer Brauch, Naveed Akhtar, Trang van Pham, Bodo Ahrens, Barbara Früh 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  13. NEMO_Nordic: Bases on NEMO v3.3, providedby SMHI Seaicemodel LIM3 activated Free surfacetoallowtidalforcing Regionales Ozean-Atmosphärenmodell NEMO_Med12: • Based on NEMO v3.2, provided by K. Beranger (LODYC/Paris) • 1-D and 3-D setup available Kolloquium zum Klimawandel, 15.04.2015

  14. COSMO-CLM and NEMO_Med12 Investigation of Medicanes (Mediterranean hurricanes) CCLM-NEMO CCLM 1-D High resolution coupled experiments improve medicane tracks (Akhtar et al, NHESSD, 2014) REKLIM - 06.10.2014

  15. Two-way-nesting: COSMO-CLM + ECHAM/MPIOM ECHAM COSMO-CLM • Elaborate 3D interpolation between model components • Sequential coupling • Evaluation: Davin et al., Clim. Dyn. [2011]; Davin and Seneviratne, Biogeosciences [2012]; Lorenz et al., JGR [2012] → Stefan Weiher, Ingo Kirchner, Markus Thürkow and Andreas Will 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  16. Two-way-nesting: COSMO-CLM + ECHAM/MPIOM Single-threading configuration Multi-threading configuration Figure: courtesy of Eric Maisonnave (CERFACS) Same performances but two-times less expensive 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  17. Unified interface Development of one unified interface in COSMO-CLM • Preprocessor options for OASIS3 or OASIS3-MCT • Minimal changes inside the code for a new module • Coupling is controlled over namelist parameters ytype_lsm= terra, clmXX, veg3d ytype_oce = nooce, nemoO, trimI, romsO ytype_2wn = no2wn, echam • Coordinated by project group OASIS 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  18. Unified interface Comparsion of the coupled systems • All coupled systems are running on one computer (Blizzard, DKRZ, Hamburg) • Region for COSMO-CLM is identical (CORDEX- Europe) • External and input parameters are identical as far as possible • Lateral boundary conditions from global model MPI-ESM • Prerequisites to participate in the technical paper which introduces • the unified interface 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  19. Individual coupled systems ECHAM COSMO-CLM VEG3D CLM NEMO TRIM ROMS CICE PARFLOW 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  20. Performances of the coupled systems • Optimal configuration (processor distribution) was chosen for the coupled systems • Maximum speed • Optimal scalability • Coupling with NEMO results in 50% more costs, it needs a lot of processors 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  21. Performances of the coupled systems • No standalone COSMO-CLM shown here • Shaded area: speed of COSMO-CLM • CESM(CLM) and ECHAM run sequentially • No speed up of ECHAM with more cores 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  22. Regional Climate System Vision from the CLM - Community science plan: • COSMO-CLM coupled to more than one component to have an regional climate system model • COSMO-CLM is already technically coupled to NEMO_MED12 and NEMO_Nordic “Development of an earth system model to reduce the uncertainties of present day climates for the key quantities temperature and precipitation” 3rd Workshop on Coupling Technologies for Earth System Models – 20.04.2015

  23. Joint effortofNaveed Akhtar, Marcus Breil, Edouard Davin , Ha Hagemann, Eric Maisonnave, Trang van Pham, Stefan Weiher, Andreas Will and myself (Jennifer Brauch)

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