Development of ATOVS Data Assimilation for Regional Forecast System Eunjoo Lee NWPD, KMA.
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Transcript of Development of ATOVS Data Assimilation for Regional Forecast System Eunjoo Lee NWPD, KMA.
![Page 1: Development of ATOVS Data Assimilation for Regional Forecast System Eunjoo Lee NWPD, KMA.](https://reader036.fdocuments.in/reader036/viewer/2022081519/56649f585503460f94c7d465/html5/thumbnails/1.jpg)
Development of ATOVS Data
Assimilation
for Regional Forecast System
Eunjoo Lee
NWPD, KMA
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Introduction of Regional Forecast System
Regional Forecast System( 3hr-cycle run, 10km resolution ) Regional Forecast System( 3hr-cycle run, 10km resolution )
00 03 06 09 12 15 18 21 24 03 ……
(D-Day) (D+1 Day )
< BG. Field >
< 24hr Fcst. >
< Time(UTC) >
Insufficient obs. data over the sea
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1DVAR for Regional Forecast System
assimilated
removed
O NOAA-16, AMSU-A ch4~ch14 , 06UTC/18UTC O Only over the sea and over the clear sky area ( Satellite data over the land or over cloudy area will be removed )
Land mask for 1DVARLand mask for 1DVAR
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Flow Chart of 1DVAR
Bg. Error Obs. Error Bias correction coeff. - Scan angle corr. - Air mas corr.
1DVAR Analysis(RTV-7)
Regional 3DVAR Analysis
Regional Model(Resolution :
10km)
Obs. Increment(O-B)(1-month)
ATOVS Data
24hr Fcst.
F_24 – F_12(1-month)
Bg Fielld(6hr forecast) 결과보기
- ATOVS Data from GTS network- Directreadout ATOVS Data by KMA
- ATOVS Data from GTS network- Directreadout ATOVS Data by KMA
- Calculated ozone profile instead of climatological ozone profile
- Calculated ozone profile instead of climatological ozone profile
( T,q )
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Directreadout ATOVS Data
O Retrieved by Remote Sensing Devision of KMA and Remote Sensing Lab of METRI
O Needed to get more satellite obs data
Directreadout ATOVS Data (NetCDF format)Directreadout ATOVS Data (NetCDF format)
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Obs data number used 1DVAR
Time series for satellite obs data number used in 1DVARTime series for satellite obs data number used in 1DVAR
GTS GTS + Direct
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TOMS OZONE DATA
1.25 X 1 grid data
ZERO value
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REFERENCE OZONE PROFILES Total ozone amount : 125 – 175 – 225 – 275275 – 325325 – 375375 – 425425 – 475 – 525 - 575575
Reference Ozone Profile at 75 N
Pressure[hPa]
Ozone amount[ppmv]
Pressure[hPa]
Ozone amount[ppmv]
Reference Ozone Profile at 45N
Ozone amount[ppmv]
Pressure[hPa]
Reference Ozone Profile at 15N
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HOW TO GET NEW OZONE PROFILE
300 Dobson at 30N
45N
15N
275 325 Dobson
275 325 Dobson
300
300
30N
45N
15N
300 Dobson
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Time series of obs increment
Time series of obs increment
AMSUA 4 AMSUA 5 AMSUA 6
AMSUA 7 AMSUA 8 AMSUA 9
AMSUA 10 AMSUA 11 AMSUA 12
AMSUA 13 AMSUA 14
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Time series of analysis increment
Time series of analysis increment
T_1000 T_975 T_925
T_900 T_850 T_800
T_700 T_500 T_400
T_300 T_250 T_200
T_150 T_100 T_70
( 15-layer Temp. )
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Time series of analysis increment
Time series of analysis increment
q_1000 T_975 T_925
T_900 T_850 T_800
T_700 T_500 T_400
T_300 T_250
( 11-layer Specific Humidity )
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Domain-averaged analysis Profile
Analysis Time : 20050530186hourly, 10-day run
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CNTL EXP
GOES-9 WV image 3 hr accumulated rain
NOAA 16 ATOVS, +12hr 3hr Precip. (valid time : 2004081006)
Obs (2004/08/10/06UTC)Comparison between Obs. & Forecast Comparison between Obs. & Forecast
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Plans
O Level 1C data assimilationO Direct radiance assimilation in Regional 3DVARO Satellite data assimilation over land
O Test of 1DVAR Impact on Typhoon forecast
Satellite data assimilationSatellite data assimilation
Regional Forecast SystemRegional Forecast System