zentralanstalt für meteorologie und geodynamik data assimilation in austria florian meier, xin yan,...
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![Page 1: Zentralanstalt für Meteorologie und Geodynamik Data assimilation in Austria Florian Meier, Xin Yan, Stefan Schneider, Christoph Wittmann, Yong Wang](https://reader036.vdocuments.site/reader036/viewer/2022081414/55140bd6550346ec488b4e33/html5/thumbnails/1.jpg)
Zentralanstalt für Meteorologie und Geodynamik
Data assimilation in Austria
Florian Meier, Xin Yan, Stefan Schneider, Christoph Wittmann, Yong Wang
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Zentralanstalt für Meteorologie und Geodynamik
Assimilation system: ALADIN-Austria parallel run
Coupling with ARPEGE forecasts (3h coupling interval) Forecast: 00 UTC +72h, 6h-assimilation cycle Domain: 300x270 grid points; 9.6 km horizontal resolution; 60
layers cy35t1: 001,927,fullpos cy36t1: BATOR, CANARI, SCREENING, MINIMIZATION,
BLEND, BLENDSUR Calculations at ZAMG; NEC SX8 Controlled by kornshell scripts
(5 masterscripts + templates)
no SMS
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Zentralanstalt für Meteorologie und Geodynamik
Activities since last meeting in Ljubljana
Change from CANARI || 3D-Var to CANARI->3D-Var Additional assimilation step at 03 UTC abandoned Blacklists from MF Assimilation cy32t1->cy36t1 (since January 2011) Satellite data change from obsoul to bufr / grib Change from static BC to VarBC More satellite data: SEVIRI, HIRS, NOAA19, METOP, ASCAT SYNOP from ZAMG+OPLACE (->more stations in HU + CH) ALARO5 with CANARI+ECMWF lagged coupling operational
since March 2011 -> linear truncation more levels in low atmosphere
Case studies: 29.5.2010 (Hungary) ; 28.2-1.3.2011 (stratus) Vertical background correlation function in CANARI Some OSE, tests on GPS, new B-Matrix, snow analysis
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Zentralanstalt für Meteorologie und Geodynamik
Verification: upper air fields
04/10/23(Präsentation)
Folie 4
temperature wind500hPa
windtemperature
850hPa
RMSE
Zeitraum 11/2010
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Zentralanstalt für Meteorologie und Geodynamik
Verification: screenlevel fields and precipitation
04/10/23(Präsentation)
Folie 5
without assimilationwith assimilation
--
+
RH2m
precipitation
T2m
BIAS
RMSE
MAE
RMSE
MAE
BIAS
S A L S A L
Zeitraum 11/2010
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Zentralanstalt für Meteorologie und Geodynamik
Old vs new cycleBias 850 hPa
temperature wind
relative humidity
oldnew
geopotential
20101005-20101025
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Zentralanstalt für Meteorologie und Geodynamik
Old vs new cycleBias 500 hPa
temperature
wind
relative humidity
old
new
geopotential
20101005-20101025
![Page 8: Zentralanstalt für Meteorologie und Geodynamik Data assimilation in Austria Florian Meier, Xin Yan, Stefan Schneider, Christoph Wittmann, Yong Wang](https://reader036.vdocuments.site/reader036/viewer/2022081414/55140bd6550346ec488b4e33/html5/thumbnails/8.jpg)
Zentralanstalt für Meteorologie und Geodynamik
Old vs new cycleRMSE 850 hPa
temperature wind
relative humidity
oldnew
geopotential
20101005-20101025
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Zentralanstalt für Meteorologie und Geodynamik
Old vs new cycleRMSE 500 hPa
temperature wind
relative humidity
oldnew
geopotential
20101005-20101025
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Zentralanstalt für Meteorologie und Geodynamik
OLD vs new cycle
OPER ASSIM old
OPER ASSIM new
MSLP
stations 0-500m 20101101-20101130 00 UTC-runs
OPER ASSIM old
OPER ASSIM new
T2m
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Zentralanstalt für Meteorologie und Geodynamik
Surface stations used in 3D-Var
T2m RH2m
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Zentralanstalt für Meteorologie und Geodynamik
Double observations from OPLACE/local data basein CANARI (visit of M. Bellus (SK) in Vienna)
filtered beforeBATOR
not filtered beforeBATOR
ZAMG->OPLACEOPLACE->ZAMGTs-increments
=
obsoul__merge.pl
16261631
22982298
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Zentralanstalt für Meteorologie und Geodynamik
Modification of CANARI background error statistics
CANARI increments are quite smooth especially in Alpine areas and even in ALARO5 -> reduction of background horizontal correlation length and introduction of vertical correlation function as already existing for snow analysis also for T2m, RH2m in „catrma“ und „cacova“ (LCORRF=.TRUE.)
)1
*)ln(*5.0()2
2
*5.0(
*),( cPjpip
d
ijr
eepr
d=45km, Pc=0.05 set in namelist
referenced=60km
Ts standard CANARI Ts CANARI +vert. corr.
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Zentralanstalt für Meteorologie und Geodynamik
positive effect on T2m especially for stations between 500-1500m, mslp slightly worse, other parameters more or less neutral
Modification of CANARI background error statistics
T2m
T2m
RH2m
RH2m
MSLP500-1000m
1000-1500m
vert. corr.reference
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Zentralanstalt für Meteorologie und Geodynamik
Assimilation of ASCAT 10m winds (25km resolution)
12,5km ASCAT wind data lead to crash in bator_decodbufr
ascat_20110610_082332_metopa_24076_ear_o_250_ovw.l2_bufr.gz
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Zentralanstalt für Meteorologie und Geodynamik
Snow analysis in CANARI
Some tests only with surface station data from ZAMG database
Modification of namelist and routines hop.F90, bator_ecritures_mod.F90
REF_A_SN=50km, REF_S_SN=5. , REF_AP_SN=0.02
RCSNSY=200. RCSNSY=2.5
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Zentralanstalt für Meteorologie und Geodynamik
RCSNSY=2.5RCSNSY=200.
Snow analysis in CANARI
problems: no 0 observations, no obs. over Switzerand and France, quality control -> station 16227
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Zentralanstalt für Meteorologie und Geodynamik
„Impact of several observation systems“ 04/10/23(Präsentation)
Folie 18
SY
NO
P
AM
DA
R
TE
MP
SE
VIR
I
ME
TO
P/N
OA
A19
AM
SU
-B GP
S
AM
SU
-A
GE
OW
IND
HIR
S
Impact of new satellite data NOAA19+Metop on temperature RMSE
Method following Storto und Randriamampianina 2010
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Zentralanstalt für Meteorologie und Geodynamik
CANARI || 3D-Var vs CANARI->3D-Var
geopotential
RMSEBIAS
T
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Zentralanstalt für Meteorologie und Geodynamik
CANARI || 3D-Var vs CANARI->3D-Var
BIAS
Rel. humi.
RMSE
wind
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Zentralanstalt für Meteorologie und Geodynamik
Outlook:
Less resources at ZAMG for data assimilation in the future Parallel run will probably be switched off soon Focus on AROME with some assimilation part (RUC+FGAT
ASCAT soil moisture kalman filter) Maybe some time for testing new observations (Metop IASI,
AIRS, SSMIS) CANARI vertical correlation in ALARO5?
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Zentralanstalt für Meteorologie und Geodynamik
Proposals of last meeting
Done: New aladin cycle CANARI ->3D-Var instaed of || 03 UTC step abandoned 5km linear truncation and orography in ALARO5 (no 3D-Var
yet) some experiments with CANARI background correlation
Not done: Tuning of o, b
Channel selection of satellite data 5km-B-matrix IDFI
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Zentralanstalt für Meteorologie und Geodynamik
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Zentralanstalt für Meteorologie und Geodynamik
Case studies
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Zentralanstalt für Meteorologie und Geodynamik
Case study: squall line 29.5.2010
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Zentralanstalt für Meteorologie und Geodynamik
04/10/23(Präsentation)
Folie 26
without assimilation CANARI+3D-var
Case study: squall line 29.5.2010 +03h
CANARI only
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Zentralanstalt für Meteorologie und Geodynamik
04/10/23(Präsentation)
Folie 27
Case study: squall line 29.5.2010 +06h
04/10/23(Präsentation)
Folie 27
CANARI only
CANARI+3D-varwithout assimilation
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Zentralanstalt für Meteorologie und Geodynamik
04/10/23(Präsentation)
Folie 28
Case study: squall line 29.5.2010 +09h
04/10/23(Präsentation)
Folie 28
CANARI only
CANARI+3D-varwithout assimilation
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Zentralanstalt für Meteorologie und Geodynamik
04/10/23(Präsentation)
Folie 29
Case study: squall line 29.5.2010 +12h
04/10/23(Präsentation)
Folie 29
CANARI only
CANARI+3D-varwithout assimilation
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Zentralanstalt für Meteorologie und Geodynamik
Case study: Low stratus at 1st March 2011 00 UTC
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Zentralanstalt für Meteorologie und Geodynamik
04/10/23(Präsentation)
Folie 31
ALADIN-Austria +24h ALADIN assim +24h
Case study: Low stratus at 1st March 2011 00 UTC
ALARO5 +24h
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Zentralanstalt für Meteorologie und Geodynamik
Case study: Low stratus at 1st March 2011 00 UTC
ALADIN+3DVAR+CANARI ALARO5+CANARI
ALADIN-AUSTRIA
no inversion
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Zentralanstalt für Meteorologie und Geodynamik
Heavy rain +Thunderstorm over Vienna 8th June 2011
82mm/12h in Vienna centre44mm/30min 11.30-12.00 UTC
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Zentralanstalt für Meteorologie und Geodynamik
Heavy rain +Thunderstorm over Vienna 8th June 2011
ALADIN_AUSTRIA
ALADIN-ASSIMALARO5
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Zentralanstalt für Meteorologie und Geodynamik
radar 20 UTC
Case study squall line on 23rd July 2009
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Zentralanstalt für Meteorologie und Geodynamik
Case study squall line on 23rd July 2009
Niederschlag 18.00-21.00 UTC
INCA-analysis
CANARI+3DVAR 3DVAR+GPS SURFEX+ASCAT
23rd July 00 UTC run: precipitation 18 UTC - 21 UTC
OPER
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Zentralanstalt für Meteorologie und Geodynamik
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Zentralanstalt für Meteorologie und Geodynamik
Increments ALARO5-CANARI: surface temperature
standard CANARI withoutvertical correlation of background errorfor T2m, RH2m
modified CANARI version withvertical correlation of background errorfor T2m, RH2m
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Zentralanstalt für Meteorologie und Geodynamik