A limited area nonlinear normal mode initialization

The paper presents a method of nonlinear normal mode initialization which is used in the operational technology of the regional numerical weather prediction for the Siberian region. This technology has been developed at the Siberian Hydrometeorological Research Institute. The comparison of results of forecasting with the use of the initialization...

fomenko.pdf3.32 MB

North Pasific diagnostic circulation model

Numerical diagnostic model, based on the finite element method is presented in the paper. Numerical experiments for the estimation of the role of wind and thermohaline factors in the North Pacific basin were carried out by the model. Diagnostic calculations both the integral stream function and 3-d baroclinic velocity fields...

kuzin.pdf5.17 MB

Inverse problem of estimation of emission source parameters in the atmospheric boundary layer

The inverse problem of the reconstruction of the effective source height and the strength from observed data of ground-level pollutant concentration is considered by solving the semiempirical equation of turbulent diffusion. Hanna’s parametrization under conditions of the intensive exchange is used to describe the vertical profile of the eddy diffusivity...

krylova.pdf4.01 MB

The adjoint problem and sensitivity algorithms for the model of atmospheric hydrodynamics in σ–coordinates

Variational statement of the hydrodynamical atmospheric problem in σ-coordinates is considered. The system of the adjoint equations and algorithms for the sensitivity investigation of the numerical model to the variations of input parameters are constructed. The example of the system organization of the direct and adjoint problems and the...

penenko.pdf7.09 MB

A numerical model of thermal bar in lake Baikal

A two-dimensional compressible nonhydrostatic numerical model is proposed for the simulation of thermal bar in a deep freshwater lake. An equation of state is used which shows a nonlinear dependence of density on temperature and pressure. Numerical experiments demonstrate the peculiarities of the temperature distribution and lake currents associated with...

cvetova.pdf5.16 MB