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Group IV. Impact of SST in the REGCM on the Spring Rainfall Over Middle East Asia. Azadi M. Islamic Republic of Iran Meteorological Organization Singh G. P. Indian Institute of Technology Delhi, India Mohandas S. National Center for Medium Range Weather Forecasting, India.

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group iv
Group IV

Impact of SST in the REGCM on the Spring Rainfall Over Middle East Asia

Azadi M.

Islamic Republic of Iran Meteorological Organization

Singh G. P.

Indian Institute of Technology Delhi, India

Mohandas S.

National Center for Medium Range Weather Forecasting, India

ICTP Workshop on the theory and use of regional climate models

26 May 2003 - 6 June 2003

Trieste Italy

slide2

Model Configuration

Centarl Lon/Lat: 60 E, 28 N

Grid distance: 45 Km

Time step: 150 s

Map Projection: Lambert

Convection: Grell with AS and FC closures

Number of Grid points: 100 (EW) ; 80 (SN)

Simulation period: April and May ‘97

conclusions
Conclusions
  • Model in general over-estimated the rainfall.
  • Grell convection scheme with AS closure seems to produce rainfall closer to CRU observations compared to FC closure.
  • Model showed remarkable ability to positively simulate the effect of SST on land-sea contrast.
future plans
Future Plans
  • Test the performance of REGCM in the simulation of mean precipitation during monsoon season and test the model resolution on the simulation results through various sensitivity experiments.
  • Study on regional features within troposphere during selected contrasting years (wet and dry) of important meteorological parameters at various atmospheric levels to see the anomalous climatic patterns.
  • Detail study on the evolution of seasonal mean monsoon circulation features from mid-latitude circulation in response to the Eurasian snow depth in winter/spring. In order to separate the influence of Eurasian snow from the Pacific SST, care will be taken so that the selected cases of high (low) snow years followed by deficient (excess) ISMR will not influenced by ENSO.
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