[CF-metadata] Standard name table - 'mini' update

From: Alison Pamment - UKRI STFC <alison.pamment>
Date: Wed, 11 Jul 2018 11:11:07 +0000

Dear All,

In an effort to wrap up the last few changes related to CMIP6 standard names I have done another small update to the standard name table. The latest version is now Version 57, dated 11 July 2018. The changes have also been published on the NERC Vocabulary Server and are listed at the end of this message.

Hyungjun Kim has been added to the list of standard name table contributors: http://cfconventions.org/Data/cf-standard-names/docs/standard-name-contributors.html.

The next update of standard names is planned for 6th August.

Best wishes,
Alison

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V57 standard name changes
1. New names
Proposed by Martin Juckes for CMIP6 LS3MIP.
change_over_time_in_amount_of_ice_and_snow_on_land (Canonical units: kg m-2)
change_over_time_in_land_surface_liquid_water_amount (Canonical units: kg m-2)
change_over_time_in_thermal_energy_content_of_ice_and_snow_on_land (Canonical units: J m-2)
depth_at_shallowest_isotherm_defined_by_soil_temperature (Canonical units: m)
mass_fraction_of_rainfall_falling_onto_surface_snow (Canonical units: 1)
mass_fraction_of_solid_precipitation_falling_onto_surface_snow (Canonical units: 1) 
tendency_of_atmosphere_mass_content_of_water_vapor_due_to_sublimation_of_surface_ice (Canonical units: kg m-2 s-1)
tendency_of_atmosphere_mass_content_of_water_vapor_due_to_sublimation_of_surface_snow (Canonical units: kg m-2 s-1)
tendency_of_thermal_energy_content_of_surface_snow_due_to_rainfall_temperature_excess_above_freezing (Canonical units: W m-2)
(N.B. tendency_of_atmosphere_mass_content_of_water_vapor_due_to_sublimation_of_surface_snow has been added as a new name, NOT as an alias of surface_snow_sublimation_amount as previously stated. This is because the units of the two quantities are different (kg m-2 s-1 and kg m-2, respectively). surface_snow_sublimation_amount has been retained in the table as a separate quantity.
2. New aliases
a. Three new aliases have been added as a result of the LS3MIP discussions:
river_water_volume_transport_out_of_cell -> outgoing_water_volume_transport_along_river_channel
river_water_volume_transport_into_cell -> incoming_water_volume_transport_along_river_channel
surface_snow_and_ice_sublimation_flux -> tendency_of_atmosphere_mass_content_of_water_vapor_due_to_sublimation_of_surface_snow_and_ice
b. Following the LS3MIP discussion in http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/020250.html, water_evaporation_flux_where_sea_ice has been made an alias of the recently introduced name surface_water_evaporation_flux. Previously it was listed as an alias of water_evaporation_flux. This 'transfer' of the alias has been made because water_evaporation_flux, now itself an alias of water_evapotranspiration_flux, includes transpiration from vegetation, whereas surface_water_evaporation_flux does not. It seems unlikely that transpiration would occur in sea_ice areas.
3. Modifications to definitions of existing names
a. Land water names
Martin Juckes has pointed out that 'land_water' should include only the parts of grounded ice_sheets that do not displace sea water. The definitions of two existing names have been amended accordingly:
land_water_amount
change_over_time_in_land_water_amount
b. Canopy names
The LS3MIP discussions gave rise to an improved definition of 'canopy': ' "Canopy" means the vegetative covering over a surface. The canopy is often considered to be the outer surfaces of the vegetation. Plant height and the distribution, orientation and shape of plant leaves within a canopy influence the atmospheric environment and many plant processes within the canopy. Reference: AMS Glossary http://glossary.ametsoc.org/wiki/Canopy.' This text has been added to the definitions of 11 existing names:
canopy_and_surface_water_amount
canopy_height
canopy_resistance_to_ozone_dry_deposition
canopy_temperature
canopy_throughfall_flux
canopy_water_amount
change_over_time_in_canopy_water_amount
lwe_thickness_of_canopy_water_amount
precipitation_flux_onto_canopy
water_evaporation_amount_from_canopy
water_evaporation_flux_from_canopy
---
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Alison Pamment                         		              Tel: +44 1235 778065
NCAS/Centre for Environmental Data Archival    Email: alison.pamment at stfc.ac.uk
STFC Rutherford Appleton Laboratory     
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.

Received on Wed Jul 11 2018 - 05:11:07 BST