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Zentralanstalt für Meteorologie und Geodynamik
LACE DA working days
14-16, June 2011
Budapest
X. Yan
Zentralanstalt für Meteorologie und Geodynamik
outline
GPS data assimilation results DA experiment results comparison using old and new Bmatrix
10.04.23
(Präsentation)
Folie 2
Zentralanstalt für Meteorologie und Geodynamik
EGVAP GPS network used for 2009 experiment 10.04.23
(Präsentation)
Folie 3
Zentralanstalt für Meteorologie und Geodynamik
ANDF
LINZ
ATPU
SALZ
SHLA
LIEZ
WEYE
AMST
ALST
ZIDF
TRAI
LEOP
MIST
BADENEUS
MATT
OBER
GUES
LEIB
GRAZ
LEOB
MURZ
SHEI
WOBGTREI
KLAF
GUMMKOET
SILL
OCHS
SONN
ROET
SAALKIBG
JENBSEEF
LAND MATR
2010: GPS stations used / Austria 40
Zentralanstalt für Meteorologie und Geodynamik
10.04.23
(Präsentation)
Folie 5Scores for 2009 and 2010
Scores on the upper air parameters for 2010 are generally better than 2009.
Improvements on temperature of 700, 850 and 925hPa temperature were found.
Humidity improved on 700hPa.
Neutral impact on geopotential and wind.
Precipitation score SAL showed a slightly improvement for the whole period. Slight better location score is found in general.
Zentralanstalt für Meteorologie und Geodynamik
10.04.23
(Präsentation)
Folie 6Conclusion on case study
GPS brings very local but in most cases positive impact (Main feature still decided by first guess)
In general, we observed that model tends to underestimate the amount of precipitation especially for the heavy precipitating events. The GPS assimilation experiments proved to have a positive impact on the intensity of precipitation in most of the case studies emphasizing the potential hidden in GPS data especially for extreme events forecast.
Zentralanstalt für Meteorologie und Geodynamik
10.04.23
(Präsentation)
Folie 7
Scores 2010 - Humidity GPS vs. Control
500hPa 700hPa
850hPa 925hPa
Zentralanstalt für Meteorologie und Geodynamik
upper air temperature bias 20100520-20100629 GPS vs. Control
925hPa 850hPa
500hPa700hPa
Zentralanstalt für Meteorologie und Geodynamik
10.04.23
(Präsentation)
Folie 9 Case study 2009 : 062200-24h
EGVAP REF
EGVAP + TU OBS
Zentralanstalt für Meteorologie und Geodynamik
Case study 2009 : 070600-24h
EGVAP REF
EGVAP + TU OBS
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 vs. 32t1 10.04.23
(Präsentation)
Folie 11
Ensemble method
Bmatrix 35t1: Autumn
Bmatrix 32t1: Winter-Spring
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 vs. 32t1
35t1 32t1
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 vs. 32t1
35t1 32t1
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 vs. 32t1
35t1 32t1
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) :surface score for 2010. 10 / 0-500m
2m temperature
2m relative humidity
Zentralanstalt für Meteorologie und Geodynamik
2m temperature
Bmatrix 35t1 (red) vs. 32t1 (blue) :surface score for 2010. 10 / 500-1000m
2m relative humidity
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) surface score for 2010. 10 / 1000-1500m
2m relative humidity
2m temperature
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) surface score for 2010. 10 / mountain stations
2m relative humidity
2m temperature
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) :geopotential score for 2010. 10
925hPa
700hPa
850hPa
500hPa
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) :relative humidity score for 2010. 10
925hPa
700hPa
850hPa
500hPa
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) temperature score for 2010. 10
925hPa
700hPa
850hPa
500hPa
Zentralanstalt für Meteorologie und Geodynamik
Bmatrix 35t1 (red) vs. 32t1 (blue) :wind score for 2010. 10
925hPa
700hPa
850hPa
500hPa
Zentralanstalt für Meteorologie und Geodynamik
conclusion
The adding of GPS data and using of a new B matrix is not degrading the results, instead a slightly positive impact
10.04.23
(Präsentation)
Folie 23
