Group 5 Group 5 Bojariu, Roxana Bojariu, Roxana National Institute of Meteorology and Hydrology, National Institute of Meteorology and Hydrology, Bucharest, Romania Bucharest, Romania Srnec, Lidija Srnec, Lidija Meteorological and Hydrological Service, Meteorological and Hydrological Service, Zagreb, Croatia Zagreb, Croatia Velea, Liliana Velea, Liliana National Institute of Meteorology and Hydrology, National Institute of Meteorology and Hydrology, Bucharest, Romania Bucharest, Romania
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Group 5 Bojariu, Roxana Bojariu, Roxana National Institute of Meteorology and Hydrology, Bucharest, Romania Bucharest, Romania Srnec, Lidija Srnec, Lidija.
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Group 5Group 5
Bojariu, Roxana Bojariu, Roxana National Institute of Meteorology and Hydrology,National Institute of Meteorology and Hydrology,
Bucharest, RomaniaBucharest, Romania Srnec, LidijaSrnec, LidijaMeteorological and Hydrological Service, Meteorological and Hydrological Service, Zagreb, CroatiaZagreb, Croatia
Velea, LilianaVelea, LilianaNational Institute of Meteorology and Hydrology,National Institute of Meteorology and Hydrology, Bucharest, RomaniaBucharest, Romania
Sensitivity of the Sensitivity of the local response over local response over Europe to extreme Europe to extreme
NAO phasesNAO phases
MotivationMotivation
NAONAO It’s a dominant circulation pattern in the It’s a dominant circulation pattern in the
Northern Hemisphere winter.Northern Hemisphere winter. It’s a source of predictability for the It’s a source of predictability for the
European regions.European regions. It has socio-economic impacts (e.g. power It has socio-economic impacts (e.g. power
and water management, marine ecosystem and water management, marine ecosystem resources, agriculture)resources, agriculture)
Questions:
Does the model represent the NAO signal?
What is the effect of ocean flux parameterization scheme on the simulated NAO signal?
Experiment designExperiment design
Domain: Domain: 80x70x1880x70x1846N,8E46N,8E
Period of simulations:Period of simulations: January 1995January 1995(CRU NAO (CRU NAO
index=+2.7)index=+2.7)
January 1996January 1996 (CRU NAO index=-(CRU NAO index=-
DIFFERENCE TEMPERATURE (COMPOSITES) 95-96(NCEP2)CRU NCEP2
PRECIPITATION Jan 1995(ECMWF)CRU
Zeng BATS
PRECIPITATION JAN 1996 (ECMWF)CRU
ZengBATS
PRECIPITATION JAN 1996 (NCEP2)CRU
ZengBATS
TEMPERATURE JAN 1995(ECMWF)CRU
ZengBATS
TEMPERATURE JAN 1996(ECMWF)CRU
ZengBATS
Preliminary conclusionsPreliminary conclusions
Local features of the NAO-type patterns are well Local features of the NAO-type patterns are well represented.represented.
Relevant local responses due to topography are Relevant local responses due to topography are identified.identified.
Zeng ocean flux parameterization scheme Zeng ocean flux parameterization scheme seems to be more realistic in precipitation field, seems to be more realistic in precipitation field, but the differences are not pronounced.but the differences are not pronounced.