Impact of a Spectral Gravity Wave Parameterization on the Stratosphere in the Met Office Unified Model

摘要: Abstract The impact of a parameterized spectrum gravity waves on the simulation stratosphere in Met Office Unified Model (UM) is investigated. In extratropical mesosphere, wave forcing acts against mean zonal wind and it dominates over resolved forcing. stratosphere, gives small acceleration direction wind. Both summer winter stratospheric jets have improved maximum strength tilt with height when included, although southern jet still more vertically aligned than observational analyses. timing seasonal breakdown vortex also by addition Tropics, most obvious that model reproduces quasi-biennial oscillation (QBO) realistic range periods. It observed asymmetries between easterl...