关键词: 谱元, 临近空间, 大气模式, 数值模拟

Abstract: A numerical model,which solves equations with spectral element method and resolves atmospheric near space,is developed.Model validations are performed.The spectral element model with atmospheric near space resolved (SEMANS) is integrated for 10 years under configuration of 81 local elements in each projected face of cubed sphere with spectral approximation of 8th degree Gauss-Lobatto-Legendre interpolation polynomial and 66 vertical layers with top layer pressure 4.5×10^-6 hPa.Through verification against ERA-Interim reanalysis dataset from ECMWF (European Center for Medium-Range Weather Forecasts) and COSPAR (Committee on Space Research) international reference atmosphere 1986,it is found that SEMANS reproduces features of 2 wave-lengths pattern along zonal circle in the northern hemisphere and 1 wave-length pattern along zonal circle in the southern hemisphere at 30hPa;SEMANS reproduces zones of low temperature at about 100 hPa,0.001 hPa and high temperature at about 1 hPa,above 0.0001 hPa;SEMANS also reproduces main features of zonal mean zonal wind in January and July below 0.001 hPa level.

Key words: spectral element, near space, atmospheric model, numerical simulation