CMA report
Xueshun ShenWGNE-29, Melbourne, 10-14 Mar.2014
Outline• New HPC• Production systems
– Current status– The coming upgrades in 2014/15
• Research activities– New dynamical core
• New Chinese satellite
Subsystem SS1 + SS2
Site Beijing ( NMIC)
Performance (TFlops) 508.93x2
Storage (TB) 2109.38x2
Total CPU Cores 17920x2
Nodes 560x2
Memory (GB) 81792x2
I/O Nodes 40x2
Network Infiniband
Total Racks 32
CMA New HPC System SS1 started operation since July/2013
SS2 is ready soon
IBM Flex System P460
Current CMA Operational NWP SystemNo big change in 2013
Spectral model from ECMWFMain production system
CMA-developed GRAPES
GLB 10-day deterministic: T639L60
Global ensemble forecast: T213L31, M15
Global Typhoon forecast: T213L31
Data assimilation: GSIData assimilation: GSI
GLB 10-day deterministic: GRAPES_GFS 50kmParallel 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•2nd –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: 12UTCMay 01-Sep.15,2013
Better than T639Over SH and tropics
Worse than T639Over East Asia
In 2015: new version of GRAPES_GFS 25kmL58
Red means better
Comparing with the parallel-run GRAPES_GFS50kmL36
Initial: 12UTCMay 2013
Research Activitiestoward 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-3CLaunched on 23, Sept. 2013
FY-3C, as the first operational one of the 2nd generation of FengYun polar-orbiting satellites, is the successor of the R&D satellites FY-3A/B working in orbit
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FY-3 OPERATIONAL SATELLITE INSTRUMENTS FY-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)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
THANK YOU