calc_sound_speed

echopype.utils.uwa.calc_sound_speed(temperature=27, salinity=35, pressure=10, formula_source='Mackenzie')

Calculate sound speed in [m/s].

Parameters

temperature: num

temperature [deg C]

salinity: num

salinity [PSU, part per thousand]

pressure: num

pressure [dbars]

formula_source: str, {“Mackenzie”, “AZFP”}

Source of formula used to calculate sound speed. “Mackenzie” (default) uses the formula from Mackenzie 1981 (see Notes below) as implemented in arlpy package. “AZFP” uses the formula supplied in the AZFP Matlab code.

Returns

Sound speed [m/s] for each input temperature value.

Notes

Mackenzie KV (1981) Nine‐term equation for sound speed in the oceans. The Journal of the Acoustical Society of America, 70(3), 807–812. https://doi.org/10.1121/1.386920 The ranges of validity encompass the following: temperature −2 to 30 °C, salinity 30 to 40 ppt, and depth 0 to 8000 m.