development of atovs data assimilation for regional forecast system eunjoo lee nwpd, kma
TRANSCRIPT
Development of ATOVS Data
Assimilation
for Regional Forecast System
Eunjoo Lee
NWPD, KMA
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
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
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 )
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)
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
TOMS OZONE DATA
1.25 X 1 grid data
ZERO value
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
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
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
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. )
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 )
Domain-averaged analysis Profile
Analysis Time : 20050530186hourly, 10-day run
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
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