[CF-metadata] New standard names for NEMO ocean model output

From: Kevin Marsh <kevin.marsh>
Date: Wed, 21 Sep 2016 18:47:32 +0000 (GMT-00:00)

Hello all,
We are working with some NEMO ocean model output data and would like to request new standard names for a number of the NEMO variables.


The list of these variables is below, in the form:

NEMO variable name :

proposed CF Standard name

proposed definition. proposed units.

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sobpheig:

bottom_pressure_equivalent_height

Difference between the sea level height and the ocean steric height. (units = m)


somixhgt:

ocean_turbocline_depth

The turbocline depth is similar to the mixed layer depth but is estimated in models as the depth at which the vertical eddy diffusivity coefficient (resulting from the vertical physics alone) fall below a given value defined locally. (units = m)


vostheig:

ocean_steric_height

The steric measures the height by which a column of water with standard temperature T=0?C and salinity S=35.0 expands if its temperature and salinity are changed to the observed values (units = m)


vosthsal:

ocean_steric_thickness_due_to_salinity

Contribution of the salinity of the water column to the Ocean steric height. (units = m)


vosthtem:

ocean_steric_thickness_due_to_temperature

Contribution of the temperature of the water column to the Ocean steric height. (units = m)


vottrdmp:

temperature_profile_anomaly_correction

Correction term estimated as the deviation the local sea water potential temperature 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. (units = K/s)


vostrdmp:

practical_salinity_profile_anomaly_correction

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. (units = s-1)


sosal[300,700]:

integral_of_sea_water_practical_salinity_wrt_depth (units = m )

This quantity is calculated as the integral, of the sea water salinty wrt depth, over the specified layer of the ocean from the surface to the level indicated by the vertical coordinate or scalar coordinate variable. "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. "Layer" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. Depth is the vertical distance below the surface.

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 should be given the m
ore general standard name of sea_water_salinity. Reference: www.teos-10.org; Lewis, 1980 doi:10.1109/JOE.1980.1145448.


sosalbtm:

integral_of_sea_water_practical_salinity_wrt_total_depth

This quantity is calculated as the integral, of the sea water salinty, over of the ocean from the sea surface to the sea bed. "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. "Layer" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. Depth is the vertical distance below the surface.

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.

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Many Thanks,
Kevin

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Kevin Marsh
ECMWF
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Received on Wed Sep 21 2016 - 12:47:32 BST