3DLOM is an anelastic and non-linear orographic model in terrain-following coordinates. Free-slip, or frictionless, lower boundary conditions are used, as well as radiative lateral boundaries and a rigid-lid scheme for the upper boundary. The model has a 64 x 64 x 28 domain, delh = 15 km, delz = 1 km, and delt = 20 s, and the model is integrated for 2000 timesteps. Note: The Oslo model is run at 10 km resolution for a 128 x 128 x 28 domain.
3DLOM is being run in 5 different regions: Scandinavia, Iceland, North Land, Novaya Zemlya, and Spitsbergen. The orography is smoothed with 5 X 5 boxcar averaging, and is shown below on the links to the individual regions. The model is initialized with an NGM global model profile, and is operated by the Middle Atmospheric Dynamics Section of the Naval Research Laboratory in Washington, DC. For more information, contact Stephen Eckermann or John Lindeman.
