ratio_of_sea_water_practical_salinity_anomaly_to_relaxation_timescale
complete
Created: Oct. 20, 2016
Proposer: Kevin Marsh
Proposed Date: 2016-09-21
Change Date: Oct. 20, 2016, 9:55 a.m.
Term: practical_salinity_profile_anomaly_correction
Unit: s-1
Unit ref: PRSC
AMIP:
GRIB:
Correction term estimated as the deviation the local sea water salinity from an ocean model wrt to an observation-based climatology (eg World Ocean Database) multiplied by an user-specified relaxation coefficient. The relaxation coefficient depends on the timescale on which the correction is applied.
Change Date: Oct. 20, 2016, 9:56 a.m.
Term: practical_salinity_profile_anomaly_correction
Unit: s-1
Unit ref: PRSC
AMIP:
GRIB:
Correction term estimated as the deviation the local sea water salinity from an ocean model wrt to an observation-based climatology (eg World Ocean Database) multiplied by an user-specified relaxation coefficient. The relaxation coefficient depends on the timescale on which the correction is applied. "anomaly" means difference from climatology.
Change Date: March 30, 2017, 1:56 p.m.
Term: ratio_of_sea_water_practical_salinity_anomaly_to_relaxation_timescale
Unit: s-1
Unit ref: PRSC
AMIP:
GRIB:
Change Date: March 30, 2017, 1:58 p.m.
Term: ratio_of_sea_water_practical_salinity_anomaly_to_relaxation_timescale
Unit: s-1
Unit ref: PRSC
AMIP:
GRIB:
The quantity with standard name ratio_of_sea_water_practical_salinity_anomaly_to_relaxation_timescale is a correction term applied to modelled sea water practical salinity. The term is estimated as the deviation of model local sea water practical salinity from an observation-based climatology (e.g. World Ocean Database) weighted by a user-specified relaxation coefficient in s-1 (1/(relaxation timescale)). The phrase "ratio_of_X_to_Y" means X/Y. The term "anomaly" means difference from climatology. Practical Salinity, S_P, is a determination of the salinity of sea water, based on its electrical conductance. The measured conductance, corrected for temperature and pressure, is compared to the conductance of a standard potassium chloride solution, producing a value on the Practical Salinity Scale of 1978 (PSS-78). This name should not be used to describe salinity observations made before 1978, or ones not based on conductance measurements. Conversion of Practical Salinity to other precisely defined salinity measures should use the appropriate formulas specified by TEOS-10. Other standard names for precisely defined salinity quantities are sea_water_absolute_salinity (S_A); sea_water_preformed_salinity (S_*), sea_water_reference_salinity (S_R); sea_water_cox_salinity (S_C), used for salinity observations between 1967 and 1977; and sea_water_knudsen_salinity (S_K), used for salinity observations between 1901 and 1966. Salinity quantities that do not match any of the precise definitions shoul d be given the more general standard name of sea_water_salinity. Reference: www.teos-10.org; Lewis, 1980 doi:10.1109/JOE.1980.1145448.