ReadWrfChem

read WRF-Chem (Weather Research and Forecasting model coupled to Chemistry) data files

Purpose

This module can be used to import data from NetCDF files generated by WRF-Chem simulations.

Files must be in NetCDF format (type classic or 64-bit offset).

The underlying data structure is assumed to be a structured grid.

For dynamic data, data for each timestep must be present in a separate file.

name	description	type
first_step	first timestep to read	Int
last_step	last timestep to read (-1: last)	Int
step_increment	number of steps to increment	Int
first_rank	rank for first partition of first timestep	Int
file_dir	NC files directory	String
num_partitions_lat	number of partitions in lateral	Int
num_partitions_ver	number of partitions in vertical	Int
var_dim	Dimension of variables (2D, 3D, other)	String
true_height	Use real ground topology ((NONE))	String
GridX	grid Sout-North axis ((NONE))	String
GridY	grid East_West axis ((NONE))	String
pert_gp	perturbation geopotential ((NONE))	String
base_gp	base-state geopotential ((NONE))	String
GridZ	grid Bottom-Top axis ((NONE))	String
Variable0	Variable0 ((NONE))	String
Variable1	Variable1 ((NONE))	String
Variable2	Variable2 ((NONE))	String
U	U ((NONE))	String
V	V ((NONE))	String
W	W ((NONE))	String
distribute_time	distribute timesteps across MPI ranks	Int

File must provide at least the following variables:

file_dir : Path to directory containing NetCDF file(s).
GridX, GridY: lateral coordinates (typically latitude and longitude) of each vertex

Also either of the following is necessary:

GridZ : elevation (in meters) of vertex
pert gp and base gp: geopotential to be used for computation of altitude of vertices

The remaining parameters might be changed/selected as needed:

This module requires the NetCDF C++ library.

This module was developed within the EU-funded project Open Forecast