Ocean fields




attributes  

name
(CMIP5/6&C3S)
dimensionsstandard_namelong_name
(CMIP5/6&C3S)
unitscoordinatescell_methodsvalid_minvalid_maxglobal attributesCOMMENTS

sos


leadtime,lat,lon

sea_water_practical_salinity


Sea Surface Salinity1


"reftime realization time leadtime lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

dimensionless units are psu

leadtime_bnds, time_bnds are required

t20dleadtime,lat,londepth_of_isosurface_of_sea_water_potential_temperatureDepth of 20 degree Celsius Isothermm"reftime realization time leadtime temperature lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

temperature=20

t26d


N/A in CMIP

leadtime,lat,londepth_of_isosurface_of_sea_water_potential_temperature

Depth of 26 degree Celsius Isotherm

N/A in CMIP

m"reftime realization time leadtime temperature lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

temperature=26

t28d


N/A in CMIP

leadtime,lat,londepth_of_isosurface_of_sea_water_potential_temperature

Depth of 28 degree Celsius Isotherm

N/A in CMIP

m"reftime realization time leadtime temperature lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

temperature=28

t14d


N/A in CMIP

leadtime,lat,londepth_of_isosurface_of_sea_water_potential_temperature

Depth of 14 degree Celsius Isotherm

N/A in CMIP

m"reftime realization time leadtime temperature lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

temperature=14

t17d


N/A in CMIP

leadtime,lat,londepth_of_isosurface_of_sea_water_potential_temperature

Depth of 17 degree Celsius Isotherm

N/A in CMIP

m"reftime realization time leadtime temperature lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

temperature=17

zosleadtime,lat,lonsea_surface_height_above_geoidSea Surface Height Above Geoidm"reftime realization time leadtime lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

thetaot300


leadtime,lat,lonsea_water_potential_temperature

Depth Average Potential Temperature of Upper 300m


K"reftime realization time leadtime depth lat lon""depth: mean leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

depth=300; depth_bnds=[0,300]

sot300


N/A in CMIP

leadtime,lat,lon

sea_water_practical_salinity

Depth Average Salinity of Upper 300m


N/A in CMIP

1

"reftime realization time leadtime depth lat lon""depth: mean leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

dimensionless units are psu

leadtime_bnds, time_bnds are required

depth=300; depth_bnds=[0,300]

mlotstheta001


N/A in CMIP

leadtime,lat,lon

ocean_mixed_layer_thickness_defined_by_sigma_theta


follows S2S proposal (0.01)
CMIP:
uses standard name "ocean_mixed_layer_thickness_defined_by_sigma_t"

Ocean Mixed Layer Thickness Defined by Sigma Theta 0.01 kg/m3m"reftime realization time leadtime sigma_theta lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required. At least 6-h
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required


sigma_theta=0.01

mlotstheta003


N/A in CMIP

leadtime,lat,lon

ocean_mixed_layer_thickness_defined_by_sigma_theta


follows CMIP6 criterium (0.03)
CMIP:
uses standard name "ocean_mixed_layer_thickness_defined_by_sigma_t"

Ocean Mixed Layer Thickness Defined by Sigma Theta 0.03 kg/m3m"reftime realization time leadtime sigma_theta lat lon""leadtime: mean (interval: <value> <unit>)"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required


sigma_theta=0.03

sithickleadtime,lat,lonsea_ice_thicknessSea Ice Thicknessm"reftime realization time leadtime lat lon""leadtime: mean (interval: <value> <unit>) area: mean where sea_ice"
C3S: interval is required.
CF:
interval is optional


"frequency":"mon"
"level_type": "ocean2d"
"modeling_realm":"ocean"

leadtime_bnds, time_bnds are required

Additional coordinates


Type

Coordinate Name

Dimension Names

Axisstandard_namelong_name

units
(CF canonical units)
positivevalid_min

valid_max

boundsNotes
doublesigma_theta

None

(scalar auxiliary coordinate)

N/Asea_water_sigma_thetaSigma-theta of Sea Waterkg m-3N/AN/AN/AN/A

Used for mixed layer depth

doubledepth

None

(scalar auxiliary coordinate)

Zdepthdepth

m

downN/AN/Adepth_bnds

When used for temp/salinity in the upper 300m

depth=300; depth_bnds=[0,300]

doubletemperature

None

(scalar auxiliary coordinate)

N/Asea_water_potential_temperatureIsotherm Temperature

degC

CF: canonical units are K

N/AN/AN/AN/AUsed for isotherm depths

Time coordinates

Some clarifications can be useful for monthly aggregations

  • What time boundaries are expected to be used to calculate the monthly aggregations?
    • For instantaneous parameters: (1st/month M at 00Z, 1st/month M+1 at 00Z] 
      (i.e. including the last point, excluding the first one)
    • For aggregated parameters: include all data intervals within month M.
      • Example: if a given variable (daily total precipitation, daily 2m maximum temp) is labelled with the timestamp of the end of the period, so it is the aggregation (accumulation, maximum) in the previous 24 hours, the same approach as the above one for instantaneous parameters can be followed.


  • For ensemble members not starting on the 1st of the month: Just the monthly means of complete calendar months should be included
    • This is to align with the current approach of monthly means calculation and archival performed at C3S from high-frequency variables.

Additional changes to C3S-0.1 Guide:

Global attributes

Attribute NameValueExamplesComment
level_type

Controlled Vocabulary

"surface", "pressure", "soil", "ocean2d"

"pressure"

A string indicating the type of the level where the variable comes from

Value depends on the variable (see "global attributes" column in variables tables)