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