polaris.tasks.ocean.realistic_global.init.jra55_map.Jra55MapStep

class polaris.tasks.ocean.realistic_global.init.jra55_map.Jra55MapStep(component, subdir, stress_step, cull_mesh_step, mesh_name)[source]

A step for building the bilinear mapping file from the JRA55-do TL319 grid to MPAS cell centers.

This is the MPI (mbtempest or ESMF) half of the JRA55-do remapping workflow; RemapJra55Step applies the resulting weights.

The method is bilinear rather than conservative because the ocean responds to wind stress curl: first-order conservative remapping gives a piecewise-constant stress whose curl is grid-scale noise, and pyremap’s moab path hard-codes --order 1 so second-order conservative is not available.

The weights are applied to the Cartesian components of the stress, which are scalars, so either map_tool can build them. ESMF’s default pole handling builds its pole point from the zonal average of the source’s outermost row, which would cancel a vector given in zonal and meridional components, since the local east/north basis rotates with longitude. See the wind-forcing section of the global_ocean_init design document.

__init__(component, subdir, stress_step, cull_mesh_step, mesh_name)[source]

Create the step.

Parameters:

Methods

__init__(component, subdir, stress_step, ...)

Create the step.

add_cf_check([filename])

Check an output file for CF compliance after the step runs.

add_dependency(step[, name])

Add step as a dependency of this step (i.e. this step can't run until the dependency has finished).

add_input_file([filename, target, database, ...])

Add an input file to the step (but not necessarily to the MPAS model).

add_output_file(filename[, validate_vars, ...])

Add the output file to the step

add_property_check(filename, check_properties)

Add a single conservation comparison for an output file

check_cf()

Check the files added with add_cf_check() for CF compliance.

check_properties()

Check conservation properties of the output files of this step.

constrain_resources(available_resources)

Update ntasks from cell-count estimate before constraining.

process_inputs_and_outputs()

Process the inputs to and outputs from a step added with polaris.Step.add_input_file() and polaris.Step.add_output_file().

run()

Set up the source and destination grids, then build the mapping file.

runtime_setup()

Update attributes of the step at runtime before calling the run() method.

set_resources([cpus_per_task, ...])

Update the resources for the subtask.

set_shared_config(config[, link])

Replace the step's config parser with the shared config parser

setup()

Declare input files and compute ntasks from the estimated mesh size.

validate_baselines()

Compare variables between output files in this step and in the same step from a baseline run if one was provided.

work_path(*filenames)

Get the absolute path to a file or directory in the step's work directory

Attributes

cores

the number of cores this step needs, in total

gpus

the number of GPUs this step needs, in total

may_span_nodes

whether this step's cores and GPUs may come from several nodes

min_cores

the number of cores this step needs in order to run at all

min_gpus

the number of GPUs this step requires, in total