DATE2019-01-08 12:44:23
IDABSTRACT2014/410
CONTACTglebruler@mail.ru
PRESENTATIONORAL
INVITED0
IDSESSION4
TITLEMODELING THE CLIMATIC VARIABILITY OF THE CASPIAN SEA
AUTHORSRashit Ibrayev (1,2)|Gleb Dyakonov (1)
AFFILIATIONS
  1. P.P.Shirshov Institute of Oceanology RAS, Moscow, Russian Federation
  2. Institute of Numerical Mathematics RAS, Moscow, Russian Federation
ABSTRACTWe reconstruct the evolution of the Caspian Sea level and water masses for the period 1958-2001 using a primitive equation model of three-dimensional ocean circulation, which includes a sea ice and air-sea interaction submodels. Six-hourly atmospheric forcing from ECMWF ERA40 dataset is used, as well as monthly data on the discharge of five major rivers and the outflow into the Kara-Bogaz-Gol Bay. Sea level is a prognostic variable of the model, therefore non-zero water budget of the Caspian Sea is explicitly accounted for. In order to describe large variations of sea level and area, observed during the period considered, the model is formulated in hybrid sigma-z coordinates and is capable of simulating flooding and drying of shore. Due to the shallowness and flatness of the Caspian Sea bottom, the variations of its area influence considerably the water budget (mainly through evaporation component), therefore it is important to allow for movement of shoreline.
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