MPAS#
Provided by National Center for Atmospheric Research (NCAR), USA
Model description#
MPAS is an atmospheric model that consists of an atmospheric fluid-flow solver (the dynamical core) and a subset of the Advanced Research WRF (ARW) model atmospheric physics. The dynamical core solves the fully compressible non-hydrostatic equations of motion. MPAS uses an unstructured centroidal Voronoi mesh (grid, or tessellation) and C-grid staggering of the state variable as the basis for the horizontal discretisation in the fluid-flow solver. For a more detailed description, see Skamarock et al. (2012).
MPAS is a community model and can be downloaded from https://mpas-dev.github.io.
Experiment runs#
NCAR ran 4 experiments, the nominal 3.75-km simulations and lower-resolution counterparts with resolutions of 7.5 km, 15 km, and 30 km.
MPAS 3.75km atmosphere-only#
- Location:
/fastdata/ka1081/DYAMOND/data/winter_data/DYAMOND_WINTER/NCAR/MPAS-3km/DW-ATM/
(standardized data by DKRZ)/fastdata/ka1081/DYAMOND/.input_winter_data/MPAS_3.75km/
(non-standardized data) with grid data inx1.41943042.static.nc
.- Setup:
MPAS-Atmosphere coupled to a 1-D slab ocean model and NOAH land model.
- Resolution:
3.75 km (41943042 horizontal grid cells), 55 vertical levels with the model top at 30 km.
The sponge layer begins at 22 km.
The ocean and land models have the same horizontal resolution.
- Comments:
Initial SST are from the data provided by DYAMOND. SSTs and mixed layer currents are predicted by the 1-D ocean model.
The 1-D slab ocean model is a conventional bulk ocean mixed layer model based on the formulation of Pollard et al. (1973).
The NOAH land surface model is described in Niu et al. (2011).
The NOAH land model was initialized with soil temperature and soil moisture from the provided DYAMOND initial condition file.
- Data description:
NCAR provide the same variables as for their DYAMOND summer contribution (see MPAS) plus the following ocean mixed layer variables in the
ocean/
folder:float t_oml(Time, nCells) ; t_oml:units = "K" ; t_oml:long_name = "ocean mixed layer temperature" ; float h_oml(Time, nCells) ; h_oml:units = "m" ; h_oml:long_name = "ocean mixed layer depth" ; float hu_oml(Time, nCells) ; hu_oml:units = "m^2 s^{-1}" ; hu_oml:long_name = "ocean mixed layer integrated u (zonal velocity)" ; float hv_oml(Time, nCells) ; hv_oml:units = "m^2 s^{-1}" ; hv_oml:long_name = "ocean mixed layer integrated v (meridional velocity)" ;
Data description of the standardized data by DKRZ will come soon.
- Contact person: