TM5 in EC-Earth & C-IFS. P. Le Sager, T. van Noije, V. Huijnen R&D Weather and Climate Modeling KNMI
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1 TM5 in EC-Earth & C-IFS P. Le Sager, T. van Noije, V. Huijnen R&D Weather and Climate Modeling KNMI Int. TM5 meeting - ISPRA - June 28 th, 2016
2 IFS NEMO Oasis Coupler
3 A brief history of EC-Earth EC-EARTH 2.3 : CMIP5 (IFS cy31r1, NEMO 2, LIM2) [mid 2010] EC-EARTH 2.4 : + Dyn. Land, + Atm. Chemistry [mid 2012] (non-interacive) EC-EARTH 3.0 : IFS cy36r4, NEMO 3.3, LIM3 [early 2013] EC-EARTH 3.1 : some tuning research [mid 2014] EC-EARTH 3.2 : NEMO 3.6, OASIS-MCT [mid 2016] workhorse for CMIP6, currently beta (tuning, forcings) Int. TM5 meeting - ISPRA - June 28 th,
4 What's new in 3.2? 2.3 for CMIP5 3.2 for CMIP6 NEMO levels 75 levels xios better conservations (z*) new equation of state improved runoff distribution IFS cy31r1 cy36r4 T159 (1.125 ) L62 T255 (0.75 ) L91 convection + microphys. param. (cy40r1) Water mass fixer (cy38r1) Interactive aerosols Better snow treatment OASIS3 OASIS3-MCT executable library TM5 TM5-MP cbm4 cbm5 feedback performance LIM 2 3 single ice category Multiple (5) ice categories Multi-layer halo-thermodynamics EVP rheology on C-grid More realistic artic sea-ice Int. TM5 meeting - ISPRA - June 28 th,
5 What's new in 3.2? software management 2.3 for CMIP5 3.2 for CMIP6 Old fashioned: ad-hoc scripts - tar files - Modernized: ec-conf utility runtime environment version control project management + tracking issues Runoff mapper - more robust & flexible PISCES - Biogeochemistry LPJ-Guess Feedback (LAIs) PISM - Parallel Ice Sheet Model XIOS - Output server Int. TM5 meeting - ISPRA - June 28 th,
6 Components of 3.2 Atmospheric Chemistry TM5 Greenland ice sheet PISM Atmospheric Dynamics IFS (H-Tessel) Bio-geo-chemistry (PISCES) Sea Ice (LIM3) Ocean NEMO 3.6 Dynamic Vegetation LPJ-Guess River Runoff Output server XIOS Int. TM5 meeting - ISPRA - June 28 th,
7 Components of 3.2 Atmospheric Chemistry TM5 Greenland ice sheet PISM Atmospheric Dynamics IFS (H-Tessel) Bio-geo-chemistry (PISCES) Sea Ice (LIM3) Ocean NEMO 3.6 Dynamic Vegetation LPJ-Guess River Runoff Oasis3-MCT Output server XIOS Int. TM5 meeting - ISPRA - June 28 th,
8 on demand Components of 3.2 Atmospheric Chemistry TM5 1 day 6 hrs 1 day Greenland ice sheet PISM 1 day 1 month Atmospheric Dynamics IFS (H-Tessel) Bio-geo-chemistry (PISCES) Sea Ice (LIM3) Ocean NEMO 3.6 Dynamic Vegetation LPJ-Guess 45 min. 45 min. River Runoff 45 min. Oasis3-MCT Output server XIOS Int. TM5 meeting - ISPRA - June 28 th,
9 GCM coniguraions Resolutions Low T159L62, ORCA1L75 Standard T255L91, ORCA1L75 High T511L91, ORCA025L75 Atmospheric Dynamics IFS (H-Tessel) Sea Ice (LIM3) Ocean NEMO 3.6 Also available Atmosphere only Ocean only River Runoff Output server XIOS Oasis3-MCT Int. TM5 meeting - ISPRA - June 28 th,
10 GCM coniguraions Status: beta consolidation waiting for forcing fields tuning Performance Std : 8-12 SYPD High: 2-4 SYPD Atmospheric Dynamics IFS (H-Tessel) River Runoff Sea Ice (LIM3) Ocean NEMO 3.6 Output server XIOS Oasis3-MCT Int. TM5 meeting - ISPRA - June 28 th,
11 ESM coniguraion #2 EC-EARTH3-CHEM Atmospheric Chemistry TM5 Resolution Standard T255L91, ORCA1L75 TM5 : 3 x2 Status testing / performance improvement & waiting for CMIP6 forcings Atmospheric Dynamics IFS (H-Tessel) River Runoff Sea Ice (LIM3) Ocean NEMO 3.6 Output server XIOS Int. TM5 meeting - ISPRA - June 28 th,
12 ESM coniguraion #4 EC-EARTH3-CC Carbon Cycle Atmospheric CO2 transport TM5 Atmospheric Dynamics IFS (H-Tessel) Bio-geo-chemistry (PISCES) Sea Ice (LIM3) Ocean NEMO 3.6 Dynamic Vegetation LPJ-Guess Resolutions Low + Standard TM5 CO2 only, mass conservative transport Exchange CO2 fluxes w/ PISCES and LPJG Status Components ready. Exchanges to be implemented. River Runoff Output server XIOS Int. TM5 meeting - ISPRA - June 28 th,
13 Performance of ESM-CHEM (1) nb of fields exchanged 82 3D fields are exchanged 13 met. fields 69 aerosols prop. 39 2D fields are exchanged Total of 2D fields 2827 (34 levels) 7501 (91 levels) Limit the number of levels exchanged! Int. TM5 meeting - ISPRA - June 28 th,
14 Performance of ESM-CHEM (2) bundles 82 3D fields are exchanged 13 met. fields 69 aerosols prop. 39 2D fields are exchanged Total of 2D fields 2827 (34 levels) 7501 (91 levels) Limit the number of levels exchanged! pseudo 3D = bundle Bundle as much as you can! Int. TM5 meeting - ISPRA - June 28 th,
15 Performance of ESM-CHEM (3) load balancing Balanced configuration depends on bundle size Further right (resp. left) bar is balanced for bundle of (resp. 1) fields Int. TM5 meeting - ISPRA - June 28 th,
16 Performance is SYSTEM DEPENDENT best configs on ECMWF Cray: XC30 vs XC40 Intel-IvyBridge Intel-Broadwell Cores per node 24 (2.7 GHz) 36 (2.1 GHz) Memory per node 64 (1866 MHz DDR3) 128 (2400 MHz DDR4) FP Instruction set AVX AVX2 IFS cores TM5-MP cores 1x45 2x36 SYPD year sim. runtime 7d 9h 5d 10h TM5-MP standalone: 2 SYPD (3x45 cores on XC40) Int. TM5 meeting - ISPRA - June 28 th,
17 Other features of interest COSP (CFMIP Observation Simulator Package) compare simulated clouds with observations Nudging IFS (from cy38r1) NEMO Stochastic parameterization of small scales perturbations applied to 3D ields tendencies TB data to mine Int. TM5 meeting - ISPRA - June 28 th,
18 Atmospheric nudging explained = model { } +,target( ) : tem perature T, vorticity VOR, divergence DI V, surface pressure SP (hum idity, cloud cover, cloud liquid & ice water content also possible),target : 6-hourly ERA-I nterim fields; linear tim e interpolation in I FS : nudging tim e scales; range of values proposed/ applied in literature: Jeuken et al. (JGR, 1996): 2.8 h (VOR & SP), 5.6 h (DI V), 27.8 h (T) Hourdin & I ssartel (GRL, 2000); Hauglustaine et al. (JGR, 2004): 2.5 h (T, VOR, DI V) Telford et al. (ACP, 2008) recom m end ~ inverse frequency of the target data (6 h in our case). Test sim ulations with EC-Earth (I FS@T255L91) show best perform ance for ~ 6 h (T, VOR, DI V, SP)
19 Atm osphere-only sim ulations with prescribed SSTs and sea ice ( ); Untuned EC-Earth version 3.2-beta Free ERA-I nterim, JJA 2006 Nudged ERA-I nterim, JJA 2006
20 Higher wind speeds in parts of Sahara and Bodélé depression ERA-I nterim
21 EC-Earth vs. standalone TM5 Rem aining differences due to: - I m provem ents in m odel physics (e.g. convection) from I FS cycle 31r2 (ERA-I ) to 36r4 (EC-Earth) - I FS resolution (T159L60 vs. T255L91) - Details of coupling (frequency; tim e interpolation) Retuning of dust em ission source is possible using existing scale factor for threshold wind speed
22 C-IFS developments: a very brief update C-IFS-CB05 has been used for CAMS Interim-Reanalysis (Flemming et al. in preparation), and will be used for upcoming CAMS-Reanalysis ( ), expected to start this autumn. CIFS-CB05-BASCOE, (extension with stratospheric chemistry & kpp), in review for GMD. Ongoing: revision of PSC parameterization, extension of evaluation. Quick study on total CO 2 emitted during 2015 Indonesian ires based on hand-guided optimization of CO emissions in C-IFS (Huijnen et al., Sci. Rep. 2016) KNMI participates in CAMS tender on Reactive Gases: Review tropospheric chemistry (e.g. isoprene) Closer links to aerosol (nitrate, sulfate precursors) Revision of stratospheric chemistry intercomparison study of trop. chemistry mechanisms. Start of tender is delayed.
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