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add sound speed to core thermo #41

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Merged
jessecusack merged 1 commit into from
Mar 20, 2026
Merged

add sound speed to core thermo #41

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14 changes: 14 additions & 0 deletions src/glide/assets/core.yml
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Expand Up @@ -383,6 +383,20 @@ CT:
valid_max: 50.0
observation_type: calculated


sound_speed:
track_qc: True
dtype: f4
CF:
long_name: Sound speed
standard_name: speed_of_sound_in_sea_water
units: m s-1
instrument: instrument_ctd
valid_min: 1400.0
valid_max: 1600.0
observation_type: calculated


N2:
track_qc: True
dtype: f4
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3 changes: 3 additions & 0 deletions src/glide/process_l1.py
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Expand Up @@ -255,6 +255,9 @@ def calculate_thermodynamics(ds: xr.Dataset, config: dict) -> xr.Dataset:
CT = gsw.CT_from_t(ds.SA, ds.temperature, ds.pressure)
ds["CT"] = (dims, CT.values, variable_specs["CT"]["CF"])

sound_speed = gsw.sound_speed(ds.SA, ds.CT, ds.pressure)
ds["sound_speed"] = (dims, sound_speed.values, variable_specs["sound_speed"]["CF"])

new_variables = ["salinity", "SA", "density", "rho0", "CT"]
ds = qc.init_qc(ds, new_variables, ds.conductivity_qc.values, config)
ds = qc.apply_bounds(ds, new_variables)
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