Dear All,
I am planning to update the standard name table on Tuesday 9th March to
add a number of new names and aliases and to
make other changes that have been agreed in recent weeks. The Standard
Names Guidelines document will also be updated.
Please see below for a full list of the planned changes. If anyone spots
any errors in the list please contact
me as soon as possible.
Best wishes,
Alison
1. New aliases for existing names
a. Cloud and precipitation variables for CMIP5. Proposed by Mark Webb.
tendency_of_air_temperature_due_to_large_scale_precipitation will become
tendency_of_air_temperature_due_to_stratiform_precipitation; K s-1
tendency_of_specific_humidity_due_to_large_scale_precipitation will
become tendency_of_specific_humidity_due_to_stratiform_precipitation;
s-1
b. Clarification of direction for convective mass flux. Proposed by
Karl Taylor.
atmosphere_convective_mass_flux will become
atmosphere_net_upward_convective_mass_flux; kg m-2 s-1
c. Spelling and syntax corrections for three names. Reported by Jonathan
Gregory.
product_of_northward_wind_and_specific_humdity will become
product_of_northward_wind_and_specific_humidity; m s-1 (adding an extra
"i" in humidity).
moles_per_unit_mass_of_cfc11_in_sea_water will become
moles_of_cfc11_per_unit_mass_in_sea_water; mol kg-1
change_over_time_in_atmospheric_water_content_due_to_advection will
become change_over_time_in_atmosphere_water_content_due_to_advection; kg
m-2
d. Cloud liquid water names. Proposed by Jonathan Gregory.
The phrase "cloud_liquid" will be changed to "cloud_liquid_water" in
three names.
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_heteroge
neous_nucleation_from_cloud_liquid will become
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_heteroge
neous_nucleation_from_cloud_liquid_water
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_melting_
to_cloud_liquid will become
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_melting_
to_cloud_liquid_water
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_riming_f
rom_cloud_liquid will become
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_riming_f
rom_cloud_liquid_water
e. Atmosphere optical thickness names. Arising from a 2008 mailing list
thread 'Modification of some existing CF standard names for chemical
constituents'.
atmosphere_optical_thickness_due_to_aerosol will become
atmosphere_optical_thickness_due_to_ambient_aerosol
+ defn update
optical_thickness_of_atmosphere_layer_due_to_aerosol will become
optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol + defn
update
2. New names
a. Cloud and radiation variables for CMIP5. Proposed by Mark Webb.
tendency_of_mass_fraction_of_stratiform_cloud_liquid_water_in_air_due_to
_convective_detrainment; s-1
tendency_of_mass_fraction_of_stratiform_cloud_ice_in_air_due_to_convecti
ve_detrainment; s-1
tendency_of_air_temperature_due_to_model_physics; K s-1
tendency_of_air_temperature_due_to_convection; K s-1
atmosphere_updraft_convective_mass_flux; kg m-2 s-1
atmosphere_downdraft_convective_mass_flux; kg m-2 s-1
atmosphere_net_upward_shallow_convective_mass_flux; kg m-2 s-1
atmosphere_net_upward_deep_convective_mass_flux; kg m-2 s-1
tendency_of_air_temperature_due_to_stratiform_cloud_and_precipitation_an
d_boundary_layer_mixing; K s-1
tendency_of_specific_humidity_due_to_stratiform_cloud_and_precipitation_
and_boundary_layer_mixing; K s-1
upwelling_longwave_flux_in_air_assuming_clear_sky; W m-2
upwelling_shortwave_flux_in_air_assuming_clear_sky; W m-2
downwelling_longwave_flux_in_air_assuming_clear_sky; W m-2
downwelling_shortwave_flux_in_air_assuming_clear_sky; W m-2
b. Satellite ice-drift names. Proposed by Thomas Lavergne.
eastward_sea_ice_displacement; m
northward_sea_ice_displacement; m
sea_ice_x_displacement; m
sea_ice_y_displacement; m
sea_ice_displacement; m
direction_of_sea_ice_displacement; degrees
c. Climate indexes, resulting from acceptance of trac ticket 33 proposed
by Heinke Hock.
number_of_days_with_air_temperature_below_threshold
number_of_days_with_air_temperature_above_threshold
number_of_days_with_lwe_thickness_of_precipitation_amount_above_threshol
d
number_of_days_with_wind_speed_above_threshold
spell_length_of_days_with_air_temperature_below_threshold
spell_length_of_days_with_air_temperature_above_threshold
spell_length_of_days_with_lwe_thickness_of_precipitation_amount_above_th
reshold
spell_length_of_days_with_lwe_thickness_of_precipitation_amount_below_th
reshold
d. Peak wave period name. Proposed by Jennifer Brown.
sea_surface_wave_period_at_variance_spectral_density_maximum; s
e. Sea water transparency and reflectance names. Proposed by Olivier
Lauret.
secchi_depth_of_sea_water; m
ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radia
tive_flux_in_air; sr^-1
angle_of_incidence; degree
angle_of_emergence; degree
f. Sea water velocity names. Proposed by Stephane Tarot.
radial_sea_water_velocity_away_from_instrument; m s-1
direction_of_radial_vector_away_from_instrument; degree
eastward_sea_water_velocity_assuming_no_tide; m s-1
northward_sea_water_velocity_assuming_no_tide; m s-1
g. Water column name. Proposed by Jeff deLaBeaujardiere.
sea_floor_depth_below_sea_surface; m
h. Aerosol optical thickness names. Proposed by Heinke Hoeck.
atmosphere_absorption_optical_thickness_due_to_ambient_aerosol; 1
atmosphere_absorption_optical_thickness_due_to_dust_ambient_aerosol; 1
atmosphere_absorption_optical_thickness_due_to_particulate_organic_matte
r_ambient_aerosol; 1
atmosphere_absorption_optical_thickness_due_to_sulfate_ambient_aerosol;
1
atmosphere_absorption_optical_thickness_due_to_seasalt_ambient_aerosol;
1
atmosphere_absorption_optical_thickness_due_to_black_carbon_ambient_aero
sol; 1
3. Modification to definition of land_ice names following discussion in
mailing list thread "Standard names for Glaciology and ice-sheet
modeling:land_ice, sea_ice, floating_ice, ice shelves..."
(
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2009/002733.html and
following).
This change affects the following 17 names:
land_ice_area_fraction
land_ice_basal_melt_rate
land_ice_basal_x_velocity
land_ice_basal_y_velocity
land_ice_calving_rate
land_ice_lwe_basal_melt_rate
land_ice_lwe_calving_rate
land_ice_lwe_surface_specific_mass_balance
land_ice_sigma_coordinate
land_ice_surface_specific_mass_balance
land_ice_temperature
land_ice_thickness
land_ice_vertical_mean_x_velocity
land_ice_vertical_mean_y_velocity
land_ice_x_velocity
land_ice_y_velocity
tendency_of_land_ice_thickness.
In the definitions, the sentence reading ' "Land ice" means glaciers,
ice-caps and ice-sheets resting on bedrock' will be extended to read '
"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock
and also includes ice-shelves.'
4. Other changes to the standard name table.
a. Remove duplicate entry for
sea_surface_height_above_reference_ellipsoid. Reported by Heinke Hoeck
and Phil Bentley.
5. Modifications to the Standard Name Guidelines document resulting from
the acceptance of trac ticket 33.
The following wording will be added to the 'Transformations' section of
the document.
A variable whose standard name has the form
number_of_days_with_X_below|above_threshold must have a coordinate
variable or scalar coordinate variable with the a standard name of X to
supply the threshold(s). It must have a climatological time variable,
and a cell_methods entry for within days which describes the processing
of quantity X before the threshold is applied. A number_of_days is an
extensive quantity in time, and the cell_methods entry for over days
should be sum.
A variable whose standard name has the form
spell_length_of_days_with_X_below|above_threshold must have a coordinate
variable or scalar coordinate variable with the a standard name of X to
supply the threshold(s). It must have a climatological time variable,
and a cell_method entry for within days which describes the processing
of quantity X before the threshold is applied. A spell_length_of_days is
an intensive quantity in time, and the cell_methods entry for over days
can be any of the methods listed in Appendix E appropriate for intensive
quantities e.g. maximum, minimum or mean.
------
Alison Pamment Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre Fax: +44 1235 446314
Rutherford Appleton Laboratory Email: alison.pamment at stfc.ac.uk
Chilton, Didcot, OX11 0QX, U.K.
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Received on Fri Mar 05 2010 - 06:11:04 GMT
