the progress of fengyun series satellite data assimilation at cma · 2016. 1. 24. · the progress...
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The progress of FengYun series satellite data assimilation at CMA
Zhang Hua, Li Juan, Liu Guiqing,Gong Jiandong,Han Wei,Ma Gong, Xu Jianmin and Zhang Qishong
China Meteorological Administration(CMA)
12th Workshop on Meteorological Operational Systems
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Outline
• FengYun series satellite• Analysis & Forecast Model: GRAPES• FY-3/MWTS radiances assimilation• FY-2 AMV assimilation• Summary
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1. FengYun series satelliteCapacity of Chinese Meteorological Satellite
Since Jan. 1969, China began to develop his own meteorological Satellite Leo Launch Data Geo Launch Data
FY-1A Sept. 7, 1988 FY-2A Jun. 10, 1997 FY-1B Sept. 3, 1990 FY-2B Jun. 25, 2000 FY-1C May 10, 1999 FY-2C Oct. 18, 2004 FY-1D May 15, 2002 FY-2D Dec. 8, 2006 FY-3A May 27, 2008
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Chinese Meteorological Satellite: Chinese Meteorological Satellite: FengYunFengYun SeriesSeries
Polar System Geostationary System
FYFY||1A1A1B1B1C1C1D1D
FYFY| |
3A 3A 3B3B3C3C
3H3H
FYFY||
2A2A2B2B2C2C2D2D2E2E
FYFY||44
Second GenerationSecond Generation
First GenerationFirst Generation
Second GenerationSecond Generation
First GenerationFirst Generation
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Abbreviation Instrument Full Name
VIRR Visible and InfraRed RadiometerIRAS InfraRed Atmospheric SounderMWTS MicroWave Temperature SounderMWHS MicroWave Humidity SounderMERSI MEdium Resolution Spectral ImagerSBUS Solar Backscatter Ultraviolet SounderTOU Total Ozone UnitMWRI Microwave Radiation ImagerSIM Solar Irradiation MonitorERM Earth Radiation MeasurementSEM Space Environment Monitor
Payloads onboard on FY-3A
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Name of Instrument
Number of Channels Spectral range Field of
Views /lineSpatial Resoluation
at Sub point (km)
VIRR 10 0.43 – 12.5μm 2048 1.1
IRAS 26 0.69 – 15.5 μm 56 17
MWTS 4 50 – 57 GHz 15 50/75
MWHS 5 150 – 183 GHz 90 15
MERSI 20 0.41 – 12.5 μm 2048/8192 1.1/250
SBUS 12 252 – 380 nm 240 70/10
TOU 6 309 – 361 nm 31 50
MWRI 6 10.65 – 150 GHz 240 15-70
Basic Information for Each InstrumentBasic Information for Each Instrument
http://www.nsmc.cma.gov.cn
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Outline
• FengYun series satellite• Analysis & Forecast Model: GRAPES• FY-3/MWTS radiances assimilation• FY-2 AMV assimilation• Summary
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2. Analysis & Forecast Model: GRAPES Main features of GRAPES-3DVar
Grid analysis A+P with flexible resolution setup
incremental xa=xb+ δx
Variable optionsanalysis Φ/T, u, v, rh
control ψ, χ
, Φu
, rh
preconditioningcontrol space ⇒
model space δx=Uw ,U ⇔
UpUvUh
Regional : Recursive filter for Uh
Global : Spectral filter for Uh
Minimization Limited memory BFGS method
Mass-wind constraint
Linear balance equation
(now)Nonlinear balance equation (on testing)
Programming Fortran90, Modular structure, to be paralleled
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Main features of GRAPES dynamics
Fully compressible equations
Height-based terrain-following coordinate
Switch between Hydrostatic and Non-hydrostatic
Arakawa C lat-lon horizontal grid
Charney-Phillips vertical grid
2-time-level semi-implicit semi-Lagrangian (SISL) time-stepping
QMSL for scalar advection
GCR for Helmholtz Eq.
3D vector form of SISL formulation
Spherical & polar effects of trajectory calculation
Cascade interpolation
Mass fixer
Polar filter
4th order horizontal diffusion
Special for Global version
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PhysicsCumulus: Betts-MillerGrid-scale precipitation: NCEP cloud-3Radiation: ECMWF or GFDL radiation packagePBL: non-local pblLand surface: SLABCloud: ECMWF diagnostic method
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ATOVS microwave (NOAA15 16 17) radiancesFY-3/Metop/NOAA-18/AIRS radianceSondes geop/ humidity / windSynops geop/ humidity/ wind Ships geop/ humidity/ wind Airep temp/ wind Satob windGPS reflectivity
Data application of GRAPES-3DVAR
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Outline
• FengYun series satellite• Analysis & Forecast Model: GRAPES• FY-3/MWTS radiances assimilation• FY-2 AMV assimilation• Summary
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3. FY-3/MWTS radiances assimilationThe cost function:
1 11 1( ) ( ) ( ) ( )2 2
b T b o T oJ x x B x x Hx y R Hx y− −= − − + − −
Basic hypothesis0)(,0)( == ob EE εε
( ) 0Tb oE ε ε =
( ), ( )Tb b o oTB E R Eε ε ε ε= =
Gaussian
R is diagonal matrix
Observation operater
QCBias-correctionCloud detection
thinning
Observation error
Key technique
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Verifying the observations & its Operater
• The observational Operater : developed by NSMC on basis of the radiance transfer model RTTOV-7
• Background: 6 hour forecast
• FY-3/MWTS Ch1-4
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FY3 MWTS CH3
innovationsimulation
Obs.
220 230 240 250 260 270Obs Tb no bc(k)
220
230
240
250
260
270
Bak
Tb(
k)
fy3mwts chan2 200907-08
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Comparing FY-3 ch3 with NOAA-15 ch7 (left:FY-3 right:NOAA-15 top:innovation bottom:simulated)
FY-3 ch3 innovation
FY-3 ch3
Simulation
NA-15 ch7 innovation
NA-15 ch7
Simulation
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Bias correction Harris&kelly方法(off-line)
– scan correction• dependent on latitude• s (Φ,θ) = R (Φ,θ) - R
(Φ,θ = 0)
– air-mass correction• Harris&kelly方法
• 2 predictor
)()()(Bias 2
10j θθθ ∑ =+=
i jijij Xaa
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-8 -6 -4 -2 0 2 4 6 80
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8FY-3 CH3 20090301-0316
no biasbias
-8 -6 -4 -2 0 2 4 6 80
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9FY-3 CH2 20090301-0316
no biasbias
-8 -6 -4 -2 0 2 4 6 80
0.1
0.2
0.3
0.4
0.5
0.6
0.7FY-3 CH4 20090301-0316
no biasbias
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f y3mwt s_chan2 na16ama_ch5
- 1
- 0. 5
0
0. 5
1
1. 5
2
1 21 41 61 81 101 121 141 161 181 201 221
na16ama_bi as_nobcna16ama_bi as_bcf y3mwt s_bi as_nobcf y3mwt s bi as bc
f y3mwt s_chan3 na16ama_ch7
- 1
- 0. 5
0
0. 5
1
1. 5
2
1 21 41 61 81 101 121 141 161 181 201 221
na16ama_bi as_nobcna16ama_bi as_bcf y3mwt s_bi as_nobcf y3mwt s bi as bc
f y3mwt s_chan3 na16ama_ch7
- 3
- 2. 5
- 2
- 1. 5
- 1
- 0. 5
0
0. 5
1
1. 5
2
1 21 41 61 81 101 121 141 161 181 201 221
na16ama_bi as_nobcna16ama_bi as_bcf y3mwt s_bi as_nobcf y3mwt s bi as bc
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Cloud detectionwindow chanl d-tbb >4k
window chanl d-tbb >3.5k
window chanl d-tbb >3k
window chanl d-tbb >3.5k √
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Channel selection
Channel
Num
Frequency
(MHz)
Chn
width
(MHz)
Majar asorption
component
Height of peak
contrabution
Majar observation
purpose
1 50,310 180 window surface Surface
Emissivity
2 53,596±115 170 O2 700 hPa Temperature
3 54,940 400 O2 300 hPa Temperature
4 57,290 330 O2 90 hPa Temperature
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General Quality Contral
• The extreme value check 350K ~150K
• Boundary check 2<scan position<14
• Background check( ) ( )b o o by x y n σ σ− ≤ +
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Thinning– In thining box (400km)
• Select clear sky observations• Uniform distribution• As the track overlap, select the observations which
close to analysis time.
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Thinningold scheme
new scheme
Select clear sky obs.Uniform distributionAs the track overlap, select the observations which close to analysis time.
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原始数据与质量控制后实际使用 的数据分布 2009030612 afterQc Channel 2
afterQc Channel 4afterQc Channel 3
Origion
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Forecast Impact experiments (1)
Date:1~20 Mar 2009Exp1:TEMPExp2:TEMP+ MWTS /FY-3。Exp3:TEMP+AMSU-A/NOAA15。
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500hpa 高度场距平相关系数 南半球
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120
OBSFY3_newN15
500hpa 高度场距平相关系数 北半球
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120
OBSFY3_newN15
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Forecast Impact experiments (2)
• Date: 20090701-0820• Contl-exp:
temp+synop+ships+airep+satob+noaa15a/16a/ 16b/17b
• FY3-exp:temp+synop+ships+airep+satob+noaa15a/16a/ 16b/17b+FY3-mwt
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北半球 500hpa高度场距平相关系数
0
0. 2
0. 4
0. 6
0. 8
1
1. 2
1 2 3 4 5 6
控制实验FY3
北半球 500hpa高度场均方根误差
0
10
20
30
40
50
60
70
80
1 2 3 4 5 6
控制实验FY3
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东亚 500hpa高度场距平相关系数
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 2 3 4 5 6
控制实验FY3
东亚 500hpa高度场均方根误差
0
10
20
30
40
50
60
1 2 3 4 5 6
控制实验FY3
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南半球 500hpa高度场距平相关系数
0
0. 2
0. 4
0. 6
0. 8
1
1. 2
1 2 3 4 5 6
控制实验FY3
南半球 500hpa高度场均方根误差
0
20
40
60
80
100
120
140
160
1 2 3 4 5 6
控制实验FY3
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全球 500hpa高度场均方根误差
0
10
20
30
40
50
60
70
1 2 3 4 5 6
控制实验FY3
全球 500hpa高度场距平相关系数
0
0. 2
0. 4
0. 6
0. 8
1
1. 2
1 2 3 4 5 6
控制实验FY3
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500hpa 高度场距平相关系数 逐日24H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 55
0. 6
0. 65
0. 7
0. 75
0. 8
0. 85
0. 9
0. 95
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
500hpa 高度场距平相关系数 逐日24H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 55
0. 6
0. 65
0. 7
0. 75
0. 8
0. 85
0. 9
0. 95
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
500hpa 高度场距平相关系数 逐日48H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
500hpa 高度场距平相关系数 逐日48H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
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250hpa 高度场距平相关系数 逐日24H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 55
0. 6
0. 65
0. 7
0. 75
0. 8
0. 85
0. 9
0. 95
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
250hpa 高度场距平相关系数 逐日24H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 55
0. 6
0. 65
0. 7
0. 75
0. 8
0. 85
0. 9
0. 95
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
250hpa 高度场距平相关系数 逐日48H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
250hpa 高度场距平相关系数 逐日48H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
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850hpa 高度场距平相关系数 逐日24H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
850hpa 高度场距平相关系数 逐日24H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
850hpa 高度场距平相关系数 逐日48H北半球 20N- 90N, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
850hpa 高度场距平相关系数 逐日48H南半球 20S- 90S, 0E- 0E
( 2009. 07. 01- 2009. 08. 20)
0. 5
0. 6
0. 7
0. 8
0. 9
1
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51
控制实验FY3
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Outline
• FengYun series satellite• Analysis & Forecast Model: GRAPES• FY-3/MWTS radiances assimilation• FY-2 AMV assimilation• Summary
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Atmospheric Motion Vectors (AMV)
• Analysis: SSI• Forecast: T213• Experiment:
OBS : temp+synop+ships+airepIR1 OBS+FY-2 IR AMVWV3 OBS+FY-2 Moisture AMV
• Date:20080701-0730
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500hpa 高度场距平相关系数 全球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
400hpa 高度场距平相关系数 全球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
300hpa 高度场距平相关系数 全球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
200hpa 高度场距平相关系数 全球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
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500hpa 高度场距平相关系数 北半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
400hpa 高度场距平相关系数 北半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
300hpa 高度场距平相关系数 北半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
200hpa 高度场距平相关系数 北半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
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500hpa 高度场距平相关系数 南半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
400hpa 高度场距平相关系数 南半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
300hpa 高度场距平相关系数 南半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
200hpa 高度场距平相关系数 南半球
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
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500hpa 高度场距平相关系数 热带
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
400hpa 高度场距平相关系数 热带
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
300hpa 高度场距平相关系数 热带
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
200hpa 高度场距平相关系数 热带
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
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500hpa 高度场距平相关系数 亚洲
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
400hpa 高度场距平相关系数 亚洲
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
300hpa 高度场距平相关系数 亚洲
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
200hpa 高度场距平相关系数 亚洲
0
0. 1
0. 2
0. 3
0. 4
0. 5
0. 6
0. 7
0. 8
0. 9
1
24 48 72 96 120 144 168 192 216 240
OBSI R1WV3
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Pre-SAC Meeting. 14th September 2009
Summary• FY3A data (MWTS, MWHS) have been
successfully assimilated in GRAPES.
• The assimilation experiments were conducted. The experiments show some positive impact and also indicate the data are usable.
• FY-2C AMV show slight positive impact.
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