A solution of the nonlinear problem for determining the wind velocity in frictionless atmosphere(the gradient wind)under given geopotential(pressure)field is proposed.The approach is analytical and is based on quadrat...A solution of the nonlinear problem for determining the wind velocity in frictionless atmosphere(the gradient wind)under given geopotential(pressure)field is proposed.The approach is analytical and is based on quadratic polynomial approximation of the geopotential field and linear approximation of the wind velocity field with respect to x and y,the coefficients of the expansions being functions of the time t.The derived system of ordinary nonlinear differential equations is analyzed as a dynamical system.Exact analytical solutions are found for some particular cases.Some of their properties bear a resemblance to those or really existing atmospheric vortices(cyclones and anticyclones).展开更多
He graduated from Sofia University,majoring in physics(meteorology)(1956)andreceived his first scientific degree(“candidate of sciences”)in 1959.Six years later(1965)he received Dr.Sc.degree in the USSR with a thesi...He graduated from Sofia University,majoring in physics(meteorology)(1956)andreceived his first scientific degree(“candidate of sciences”)in 1959.Six years later(1965)he received Dr.Sc.degree in the USSR with a thesis on large scale atmospheric turbulenceand statistical macrostructure of meteorological fields.Since 1959 he has been a member of the Dept.of Meteorology and Geophysics,Univ.of Sofia and professor——head of this department since 1974.Prof.Panchev teaches regu-larly courses in general and dynamic meteorology and he has written textbooks on thesesubjects,the second one of them being published also in English by D.Reidel in 1985.展开更多
文摘A solution of the nonlinear problem for determining the wind velocity in frictionless atmosphere(the gradient wind)under given geopotential(pressure)field is proposed.The approach is analytical and is based on quadratic polynomial approximation of the geopotential field and linear approximation of the wind velocity field with respect to x and y,the coefficients of the expansions being functions of the time t.The derived system of ordinary nonlinear differential equations is analyzed as a dynamical system.Exact analytical solutions are found for some particular cases.Some of their properties bear a resemblance to those or really existing atmospheric vortices(cyclones and anticyclones).
文摘He graduated from Sofia University,majoring in physics(meteorology)(1956)andreceived his first scientific degree(“candidate of sciences”)in 1959.Six years later(1965)he received Dr.Sc.degree in the USSR with a thesis on large scale atmospheric turbulenceand statistical macrostructure of meteorological fields.Since 1959 he has been a member of the Dept.of Meteorology and Geophysics,Univ.of Sofia and professor——head of this department since 1974.Prof.Panchev teaches regu-larly courses in general and dynamic meteorology and he has written textbooks on thesesubjects,the second one of them being published also in English by D.Reidel in 1985.
