CMA report Xueshun Shen WGNE-29, Melbourne, Mar.2014

Outline New HPC Production systems – Current status – The coming upgrades in 2014/15 Research activities – New dynamical core New Chinese satellite

SubsystemSS1 + SS2 Site Beijing （ NMIC ） Performance (TFlops)508.93x2 Storage (TB) x2 Total CPU Cores17920x2 Nodes560x2 Memory (GB)81792x2 I/O Nodes40x2 NetworkInfiniband Total Racks32 CMA New HPC System SS1 started operation since July/2013 SS2 is ready soon IBM Flex System P460

Current CMA Operational NWP System No big change in 2013 Spectral model from ECMWF Main production system CMA-developed GRAPES GLB 10-day deterministic:  T639L60 Global ensemble forecast:  T213L31, M15 Global Typhoon forecast:  T213L31 Data assimilation: GSI GLB 10-day deterministic:  GRAPES_GFS 50km Parallel run vs. T639 Meso-scale :  GRAPES_Meso 15km  GRAPES_Meso 5km Only seasonal run Typhoon forecast:  GRAPES_Meso 15km Rapid update:  GRAPES_RAFS 15km Data assimilation: GRAPES_3DVAR Data assimilation: GRAPES_3DVAR

The coming upgrades of operational systems

Concentrated upgrades by the end of May 2014: renew 4 product systems

Sep./2014: GRAPES_GFS upgrade 50kmL36 Global 3DVAR Model-space 3DVAR analysis system available Revised to solve the wind-mass balance equation in terrain- following model grid space rather than by virtue of using ancillary pressure level – Over the tropics: linear balance equation + statistics Implementation of Var-QC for conventional data New GNSS/RO QC Optimization of vertical correlation structure of background error Global Model Bug fix in shallow cumulus convection & radiation schemes 2 nd –order finite difference scheme on non-uniform grid bug fix in scalar advection scheme (PRM) Monotonic spline to constrained cubic interpolation for moist variables Much faster GCR solver

Parallel run: GRAPES_GFS 50kmL36 Red means better Initial: 12UTC May 01-Sep.15,2013 Better than T639 Over SH and tropics Worse than T639 Over East Asia

In 2015: new version of GRAPES_GFS 25kmL58 Red means better Comparing with the parallel-run GRAPES_GFS 50kmL36 Initial: 12UTC May 2013

Research Activities toward future CMA NWP

Conservation law Fundamentals: nodal type conservative formulation based on local high-order reconstruction (Ii & Xiao,2009) Mesh element Reconstruct flux function Riemann problem Multi-moments: Point values Integrated values Derivatives Multi-moments: Point values Integrated values Derivatives

Progresses of MCV dynamical core The 2-D compressible non-hydrostatic flow – Cold bubble – Internal gravity wave – Steep mountain model intercomparison project (Satomura et al, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., No. 46B, 2003) – Schär mountain The global shallow water model at various quasi- uniform spherical grids Li, Chen, Shen and Xiao, et al (MWR, 2013) Li, Shen et al (AAS, 2013) Chen, Li, Shen and Xiao ( JCP, 2013) Chen, Bin, Xiao, Li and Shen (QJRMS, 2013)

Chinese Satellites

New baby: FY-3C Launched on 23, Sept FY-3C, as the first operational one of the 2 nd generation of FengYun polar-orbiting satellites, is the successor of the R&D satellites FY-3A/B working in orbit ok

FY-3 OPERATIONAL SATELLITE INSTRUMENTSFY-3C MERSI – Medium Resolution Spectral Imager ( I, II ) √(I) MWTS – Microwave Temperature Sounder ( I, II ) √(II) MWHS – Microwave Humidity Sounder ( I, II ) √(II) MWRI – Microwave Radiation Imager √ WindRAD - Wind Radar GAS - Greenhouse Gases Absorption Spectromete HIRAS – Hyperspectral Infrared Atmospheric Sounder OMS – Ozone Mapping Spectrometer GNOS – GNSS Occultation Sounder √ ERM – Earth Radiation Measurement ( I, II ) √(I) SIM – Solar irritation Monitor ( I, II ) √(II) SES – Space Environment Suite √ IRAS – Infrared Atmospheric Sounder √ VIRR – visible and Infrared Radiometer √ SBUS – Solar Backscattered Ultraviolet Sounder √ TOU – Total Ozone Unit √ FY-3C instruments(12) Major Improvements compared with FY-3A/B: A GNSS Occultation Sounder added for GPS sounding MWTS sounding channels increased from 4 to 13, while spatial resolution from 70Km to 20Km MWHS sounding channels increased from 5 to 15, with 118GHz O2 absorbing band new added Auto solar-tracking capability for SIM to improve measurement accurcy Better performance for at least 60% of instrument specifications Longer design life, more reliable for operational guarantee

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