Source code for compass.ocean.tests.global_convergence.cosine_bell.mesh

import numpy as np

from mpas_tools.ocean import build_spherical_mesh

from compass.step import Step
from compass.model import make_graph_file

[docs]class Mesh(Step): """ A step for creating uniform global meshes Attributes ---------- resolution : int The resolution of the (uniform) mesh in km """
[docs] def __init__(self, test_case, resolution): """ Create a new step Parameters ---------- test_case : compass.ocean.tests.global_convergence.cosine_bell.CosineBell The test case this step belongs to resolution : int The resolution of the (uniform) mesh in km """ super().__init__(test_case=test_case, name='QU{}_mesh'.format(resolution), subdir='QU{}/mesh'.format(resolution)) for file in ['', '']: self.add_output_file(filename=file) self.resolution = resolution
[docs] def run(self): """ Run this step of the test case """ logger = self.logger # only use progress bars if we're not writing to a log file use_progress_bar = self.log_filename is None # create the base mesh cellWidth, lon, lat = self.build_cell_width_lat_lon() build_spherical_mesh(cellWidth, lon, lat, out_filename='', logger=logger, use_progress_bar=use_progress_bar) make_graph_file(mesh_filename='', graph_filename='')
[docs] def build_cell_width_lat_lon(self): """ Create cell width array for this mesh on a regular latitude-longitude grid Returns ------- cellWidth : numpy.array m x n array of cell width in km lon : numpy.array longitude in degrees (length n and between -180 and 180) lat : numpy.array longitude in degrees (length m and between -90 and 90) """ dlon = 10. dlat = dlon constantCellWidth = float(self.resolution) nlat = int(180/dlat) + 1 nlon = int(360/dlon) + 1 lat = np.linspace(-90., 90., nlat) lon = np.linspace(-180., 180., nlon) cellWidth = constantCellWidth * np.ones((lat.size, lon.size)) return cellWidth, lon, lat