Example usage:
mpiexec -n 2 monc --config=config.mcf
Dependencies:
- MPI
Compilers tested:
- GNU (on laptop and ARCHER)
- Cray (on ARCHER)
Notes on compilation:
- See wiki page on this site
This code simulates the development of a plume using a Parcel-in-Cell approach. A detailed technical description is given by Dritschel et al 2018 (QJRMS, https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/qj.3319).
The code is currently constructed so that it uses as simple a set of equations as possible. The default test case is a spherical moist and warm thermal in a neutrally-stable boundary layer overlaid with a stably-stratified atmosphere. The code is currently non-dimensional, and uses idealised environmental profiles for stratification and environmental humidity. It is also a tool for demonstrating the Parcel in Cell method in a meteorological context, and shows how intricate representations of cloud properties can be efficiently produced using the method.
Mass, specific humidity and liquid-water potential temperature are conserved following the motion of each parcel. Parcel vorticity is evolved in the dynamical equations. MPIC has the advantages that it has an explicit sub-grid representation and numerical dissipation is minimal and can be controlled. The number of tuning parameters is kept to a minimum.
Effects of latent heating are included by increasing the effective buoyancy whenever the parcel specific humudity exceeds the height-dependent saturation profile.
Mixing is included in the form of parcel splitting and merging.
The code is written in Fortran, and has been parallelised within the eCSE project "A fully Lagrangian dynamical core for the Met Office NERC Cloud Model"