Temperature & Salinity Fields at ONC SoG Cental Node from SalishSeaCast.202111 Double Resolution Experiment

A configuration of version 202111 of the SalishSeaCast NEMO model with doubled spatial resolution was run for 2017 during the summer of 2021. It was an experiment supported by UBC-ARC. Objectives of the experiment were:

to learn what oceanographic insights might be gained by running the model at double resolution
to learn about the HPC compute, storage, and operational requirements and challenges associated with running the model at double resolution

One of the analysis tasks we decided to do to evaluate the double resolution run was to compare the calculated temperature and salinity values to observations collected at the ONC SCVIP node. It was decided to extract a 5x5x5 cube of values approximately centred on the location of the node.

The analysis notebook that uses the results of this extraction is:

Execution

The task described above can be accomplished using Reshapr on the MOAD compute server salish with the command:

(reshapr)$ reshapr extract Reshapr/docs/examples/extract_ONC_SCVIP_physics_hour_avg.yaml

where Reshapr/docs/examples/extract_ONC_SCVIP_physics_hour_avg.yaml is an extraction processing configuration YAML file containing:

# reshapr extract processing configuration for hour-averaged temperature
# and salinity fields at ONC SoG cental node (SCVIP) from SalishSeaCast.202111
# double resolution experiment
#
# SCVIP location data from SalishSeaTools/salishsea_tools/places.py:
#    'Central node': {
#        # location from Ocean Networks Canada (ONC) website
#        'lon lat': (-123.425825, 49.040066666),
#        # depth in metres from ONC website
#        'depth': 294,
#        # corresponding python vertical grid index
#        'NEMO grid k': 34,
#        # NEMO python grid indices: j in y direction, i in x direction
#        'NEMO grid ji': (424, 266),
#        # HRDPS python grid indices: j in y direction, i in x direction
#        'wind grid ji': (133, 147),
#        # ONC data web services API station code
#        'ONC stationCode': 'SCVIP',
#    }

dataset:
  model profile: SalishSeaCast-202111-2xrez-salish.yaml
  time base: hour
  variables group: physics tracers

dask cluster: salish_cluster.yaml

start date: 2017-01-01
end date: 2017-12-31

extract variables:
  - votemper
  - vosaline

selection:
  depth:
    depth min: 66
    depth max: 71
  grid y:
    y min: 846
    y max: 851
  grid x:
    x min: 530
    x max: 535

include lons lats: True

extracted dataset:
  name: SalishSeaCast_ONC_SCVIP_hour_TS
  description: Hour-averaged temperature & salinity around ONC SoG central node (SCVIP)
               extracted from SalishSeaCast v202111 double resolution run
  dest dir: /ocean/dlatorne

Please see extract Process Configuration File for details of meanings and choices available for the items in the YAML file.