.. _UM-DYAMOND-SUMMER: Unified Model (UM) ======================================== Model description ----------------- The Met Office Unified Model (UM) vn11.0 is made of the Global Atmosphere 7.1 and JULES Global Land 7.0 described in `Walters et al. (2017) `__. The UM dynamical core ENDGame uses a semi-implicit semi-Lagrangian formulation to solve the non-hydrostatic, fully-compressible deep-atmosphere equations of motion (`Wood et al., 2014 `__).The model is forced with climatological distributions of aerosol and ozone. Contact ~~~~~~~ `Pier Luigi Vidale `__, National Centre for Atmospheric Science (NCAS), UK Data structure -------------- Horizontal ~~~~~~~~~~ The model uses the regular grid N2560. This grid has 2N points zonally, and 3*N/2 points meridionally, i.e dx(equator)=8km and dx(mid-lat) = 5km. Vertical ~~~~~~~~ The model uses 85 vertical levels with 50 levels below 18 km and 35 levels above this and a fixed model lid 85 km above sea level. Data ---- Initialisation and Boundary conditions -------------------------------------- Soil Initialisation ~~~~~~~~~~~~~~~~~~~ Input Data ~~~~~~~~~~ UM will use the provided `grib file with IFS data from 01 Aug 2016 `__. Treatment of SST and Sea Ice ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UM will use the provided `IFS data (7 day means) `__. See also --------