Page Comparison

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1. TempestRemap
   
   a. Clone repository: `git clone https://github.com/ClimateGlobalChange/tempestremap.git tempestremap`
   b. Create build dir: cd tempestremap && mkdir build
   c. Generate configure script: autoreconf -fi
   d. Go to build dir: cd build
   e. Configure: ../configure --prefix=$INSTALL_PREFIX/tempestremap --with-netcdf=$NETCDF_DIR --with-hdf5=$HDF5_DIR CC=$CC CXX=$CXX CXXFLAGS="-g -O2"
   f. Build and install: make all && make install
   
   At the end of this series of steps, the TempestRemap libraries and tools (GenerateCSMesh, GenerateICOMesh, GenerateOverlapMesh, GenerateOfflineMap among others) will be installed in $INSTALL_PREFIX/tempestremap directory.
   
   
2. MOAB
   
   a. Clone repository: git clone https://bitbucket.org/fathomteam/moab.git moab
   b. Create build dir: cd  cd moab && mkdir build
   c. Generate configure script: autoreconf  autoreconf -fi
   d. Go to build dir: cd build
   e. Configure: ../configure --prefix=$INSTALL_PREFIX/moab --with-mpi --with-tempestremap=$INSTALL_PREFIX/tempestremap --with-netcdf=$NETCDF_DIR --with-hdf5=$HDF5_DIR CC=$CC FC=$FC F77=$FC CXX=$CXX CXXFLAGS="-g -O2" --with-eigen3=$INSTALL_PREFIX/eigen3
   f. Build and install: make all && make install
   
   If steps (a)-(f) pass fullysuccessfully, the MOAB libraries and tools, along with interfaces for TempestRemap will be installed in $INSTALL_PREFIX/moab directory. The offline remapping weight computation tool, mbtempest, will also be installed during this process and can then be used standalone to generate the weight files as needed.

What is mbtempest ?

The mbtempest tool mbtempest tool exposes the algorithms and interfaces to invoke TempestRemap through MOAB to generate remapping weights for combinations of discretizations and unstructured meshes defined on a source grid to a target grid. Most of the options supported by TempestRemap tools are provided in this unified interface with one key difference: the entire workflow makes use of MPI parallelism. This implies that the overlap mesh computation that would normally use the GenerateOverlapMesh tool in TempestRemap would be replaced by the MOAB's parallel implementation of an advancing front intersection computation. This intersection mesh can subsequently be written out to file as an intermediate step or used by mbtempest to generate the remapping weights needed to project a solution field from source to target component grid. Prescriptions to preserve conservation of scalar/flux data and to impose monotonicity constraints are also available as options to pass to the mbtempest tool.