Horizontal discretization: Spectral element

Vertical discretization: Floating Lagrangian

Domain: Global

Resolution: ne30 (~1.0 deg, 111 km) global grid with ne240 (~0.125 degree, 14 km) nest.

Vertical levels: 30 (model top ~40km)

Physics timestep: 450 seconds (7.5 minutes)

Physics package: Default CAMv5 physics, prescribed modal aerosols.

Initial conditions: GDAS (GFS operational) analysis, digitally filtered (forward DFI) using a Heaviside step function. Fixed, persistent SSTs/ice from GDAS on V-R domain. Land initial conditions spun up using data atmosphere and then incrementally nudged each forecast cycle by previous 12/24 hour forecast.

Land model: CLM 5.0, native V-R grid

Topography: From ~3km USGS, scale-selectively smoothed with Laplacian filter

CESM tag: CESM 2.0.alpha07

Forecast config. reference: (DOI) C. M. Zarzycki and C. Jablonowski (2015), Experimental tropical cyclone forecasts using a variable-resolution global model. Mon. Weat. Rev., doi:10.1175/MWR-D-15-0159.1

cam-se grid