Prepared by
Mark Webb and Karl E. Taylor
Based, originally, on AMIP Standard Output Tables developed by
PCMDI and the AMIP panel
A pdf version of this page can be downloaded from here.
Monthly data and time-independent fields
Table CF1a: 2-d atmosphere or surface data (longitude, latitude, time)
Table CF1b: ISCCP simulator data (longitude, latitude, pressure2, tau, time)
Table CF1c: 3-d atmosphere data on pressure levels (longitude, latitude, pressure, time)
Table CF1d: 3-d data on model levels (longitude, latitude, model_level, time)
Table CF1e: time-independent 2-d surface data (longitude, latitude)
Table CF2a: 2-d atmosphere or surface data (longitude, latitude, time)
Table CF2b: ISCCP simulator data (longitude, latitude, pressure2, tau, time)
Table CF3a: 2-d atmosphere data (longitude, latitude, time)
Table CF3b: ISCCP simulator data (longitude, latitude, pressure2, tau, time)
Table CF3c: 3-d atmosphere data on pressure levels (longitude, latitude, pressure, time)
Table CF3d: 3-d atmosphere data on model levels (longitude, latitude, pressure, time)
Table CF4: Monthly-mean 2-d radiative forcing data for doubled co2 (longitude, latitude, time).
In order to facilitate participation in various community modeling experiments (e.g., IPCC, CMIP, AMIP, CFMIP), the Program for Climate Model Diagnosis and Intercomparison (with encouragement from the WGCM and WGNE and in collaboration with project leaders) is attempting to establish a more uniform set of model output requirements. CFMIP was initiated before this effort had matured sufficiently, so initial CFMIP output has been collected in various structures and formats, but to facilitate analysis of future model output, any new CFMIP data should conform to the new requirements.
Modeling groups contributing output to the CFMIP database
are henceforth asked to ensure that it meets rather strict format and metadata
requirements. These requirements yield files produced in network Common
Data Form (netCDF; see http://www.unidata.ucar.edu/packages/netcdf),
which has become the most popular form for exchanging ocean-atmosphere model
output. The files are "self-describing" and the metadata
contained in the files conform with the NetCDF Climate and Forecast (CF)
Metadata Conventions (see http://www.cgd.ucar.edu/cms/eaton/cf-metadata).
The CF conventions for netCDF data generalize and extend the
The standards for CFMIP contributions closely follow those established for IPCC/CMIP, which are given in the document http://www-pcmdi.llnl.gov/ipcc/IPCC_output_requirements.htm. This document should be read carefully before preparing contributions. Perhaps the easiest way to meet these requirements is to rewrite your model output through CMOR, a software library available from PCMDI and further described in the next paragraph. Put briefly, the requirements specify required metadata and file organization, along with acceptable coordinate systems.. Units and sign conventions of the data must conform to the tables below. Latitude-longitude grids must be rectilinear, i.e., have a unique set of longitudes that applies to all latitudes. Data on non-rectilinear grids must be interpolated to rectilinear grids before transmission to the PCMDI. With the exception of certain cloud-related fields (which as noted below should be provided on model levels), three-dimensional atmosphere variables must be interpolated to standard pressure levels given below. Each output file should contain only a single output variable, though there may be many time points per file. This file organization contrasts with the typical model output history files, which contain all variables for a single time step.
To facilitate adherence to these standards, a PCMDI team has written (in FORTRAN 90) a standard output code called CMOR (pronounced "see more"), which is now available as open source. This code structures the data uniformly and writes netCDF files in full compliance with IPCC and CFMIP requirements. Use of CMOR is being encouraged (and in some cases required) by various other ongoing model intercomparison projects. A cmor_readme file (see http://www-pcmdi.llnl.gov/software/cmor/cmor_readme.html) and code documentation in pdf format (see http://www-pcmdi.llnl.gov/software/cmor/cmor_users_guide.pdf) are available. For further information, contact taylor13@llnl.gov.
The IPCC/CMIP requirements as defined by http://www-pcmdi.llnl.gov/ipcc/IPCC_output_requirements.htm should be satisfied by new submissions of CFMIP data except that in that document:
'slab ocean control experiment'
'2xCO2 equilibrium experiment'
'+2K perpetual July experiment'
'0K perpetual July experiment'
'-2K perpetual July experiment'
4. The CFMIP files should be stored in the following directory structure: A separate directory should be created containing all the variables in each model/experiment/standard_output_table category (e.g., CSIRO/Slabcntl/A1). This will ensure that filenames within each directory are unique. For uniformity, it is suggested that the trailing lower case letter, found on the tables below, should be dropped (e.g., 'CF1', not CF1a) and it is suggested that the experiments be abbreviated as follows:
Slabcntl (i.e., the slab ocean control experiment)
2xCO2 (i.e., the 2xCO2 equilibrium experiment)
Plus2KJul (i.e., the +2K perpetual July experiment)
CntlJul (i.e., the 0K perpetual July experiment)
Minus2KJul (i.e., the -2K perpetual July experiment)
5.
For perpetual July experiments
the calendar should be set to 'none', no matter what calendar is assumed by
your model. The basetime should be set to "days since
6. For slab ocean monthly mean data, climatological values should be reported (averages of several January's, several February's, etc.). The CF-convention specifies that time bounds information should be stored in an array identified by the "climatology" attribute (http://www.cgd.ucar.edu/cms/eaton/cf-metadata/CF-1.0.html#climatology), and the "cell_methods" attribute (http://www.cgd.ucar.edu/cms/eaton/cf-metadata/CF-1.0.html#cell-methods) provides further information concerning how the climatological values are computed. For CFMIP, the CF conventions should be followed, but the complete set of climatological metadata accommodated by the conventions is not yet produced by CMOR. It is therefore currently acceptable to omit the "climatology" attribute and simply record the cell bounds as if they were monthly means (and CMOR will indicate in the cell_methods attribute that a time-mean is stored, but not that it is a climatological mean). In the future CMOR will be modified to accommodate climatological data.
The notes that appear in the tables below are meant to provide precise definitions of the requested fields. Sometimes it may be impossible to satisfy the requests; in these cases, any deviations from the specifications below should be described in the "history" and/or "comment" attributes associated with the variable.
Various fields, sampled at various frequencies, are needed to carry out various proposed CFMIP analyses (see http://cfmip.metoffice.com/DR.html). The tables below derive from tables (again see http://cfmip.metoffice.com/DR.html) that were originally modified from the AMIP standard output tables (see http://www-pcmdi.llnl.gov/projects/amip/OUTPUT/AMIP2/index.html) to meet the needs of CFMIP. These "original" CFMIP tables have been restructured to be more consistent with IPCC standard output and to be consistent with the CMOR input tables that have been created for CFMIP. The "analysis packages" indicated by letters in the fifth and sixth columns of each table refer to various proposed CFMIP analyses. A few fields are not called for by any of the currently proposed projects, but have been requested as part of the IPCC standard model output, so they are included here because they may eventually be of some interest.
Tables CF1, CF2, and CF3 contain fields reported at monthly, annual, and daily frequencies, respectively. Table CF4 contains doubled CO2 forcing fields. Tables CF1, CF2, and CF3 are further separated below into component tables, depending largely on whether the fields are spatially two or three dimensional and whether the three dimensional fields are stored on pressure levels or model levels. Finally, a separate component table contains ISCCP simulator output.
CFMIP output is requested for different time periods, depending on the reporting frequency and the experiment. In the case of "monthly mean" data:
As noted below some of the tables parallel the IPCC standard output tables, but have been assigned a different table number. Also a few minor differences between these tables and the original CFMIP tables exist. The current lists are preferable, however submission of data based on old CFMIP diagnostic lists are acceptable.
Monthly data and time-independent fields
For slab ocean experiments, 20*12 months of monthly mean data should be reported after equilibrium is reached. If this is not possible, a monthly mean climatology is acceptable, although this will preclude much of the analysis in subproject 3. For perpetual-July experiments, 24 monthly means should be reported, again after equilibrium is reached. Failing this, a climatological mean would be acceptable.
|
|
CF standard_name |
output variable name |
units |
±2K analysis pack-ages |
Slab analysis pack-ages |
notes |
|
1 |
air_pressure_at_sea_level |
psl |
Pa |
A, Z |
E, Z |
|
|
2 |
precipitation_flux |
pr |
kg m-2 s-1 |
A, Z |
E, Z |
includes both liquid and solid phases. |
|
3 |
air_temperature |
tas |
K |
A, D, Z |
E, H, Z |
near-surface (usually, 2 meter) air temperature; the CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
4 |
Moisture_content_of_soil_layer |
mrsos |
kg m-2 |
Z |
Z |
water in all phases in the upper 0.1 meters of soil, and averaged over the land portion of the grid cell (i.e., compute by dividing the total mass of water contained in the soil layer of the grid cell by the land area in the grid cell); report as "missing" or 0.0 where the land fraction is 0; the CMOR singleton dimension default value of 0.1 m can be overridden, if absolutely necessary, by redefining axis "depth1". |
|
5 |
soil_moisture_content |
mrso |
kg m-2 |
Z |
E, Z |
water in all phases summed over all soil layers, and averaged over the land portion of the grid cell (i.e., compute by dividing the total mass of water contained in the soil layer of the grid cell by the land area in the grid cell); report as "missing" or 0.0 where the land fraction is 0. |
|
6 |
surface_downward_eastward_stress |
tauu |
Pa |
Z |
Z |
|
|
7 |
surface_downward_northward_stress |
tauv |
Pa |
Z |
Z |
|
|
8 |
surface_snow_thickness_where_snow |
snd |
m |
Z |
Z |
this thickness when multiplied by the average area of the grid cell covered by snow yields the time-mean snow volume. Thus, for time means, compute as the weighted sum of thickness (averaged over the snow-covered portion of the grid cell) divided by the sum of the weights, with the weights equal to the area covered by snow. report as 0.0 in snow-free regions. |
|
9 |
surface_upward_latent_heat_flux |
hfls |
W m-2 |
A,D,L,Z |
E, L, Z |
|
|
10 |
surface_upward_sensible_heat_flux |
hfss |
W m-2 |
A,D,L,Z |
E,L,Z |
|
|
11 |
surface_downwelling_longwave_flux_in_air |
rlds |
W m-2 |
A,D,L,Z |
E,L,Z |
|
|
12 |
surface_upwelling_longwave_flux_in_air |
rlus |
W m-2 |
A,D,L,Z |
E,L,Z |
|
|
13 |
surface_downwelling_shortwave_flux_in_air |
rsds |
W m-2 |
A,D,L,Z |
E,L,Z |
|
|
14 |
surface_upwelling_shortwave_flux_in_air |
rsus |
W m-2 |
A,D,L,Z |
E,L,Z |
|
|
15 |
surface_temperature |
ts |
K |
A, D, Z |
E, H, Z |
"skin" temperature (i.e., SST for open ocean) |
|
16 |
surface_air_pressure |
ps |
Pa |
A, Z |
E, Z |
not mean sea-level pressure |
|
17 |
snowfall_flux |
prsn |
kg m-2 s-1 |
Z |
Z |
|
|
18 |
convective_precipitation_flux |
prc |
kg m-2 s-1 |
Z |
Z |
|
|
19 |
atmosphere_water_vapor_content |
prw |
kg m-2 |
A, D, Z |
E, Z |
vertically integrated through the atmospheric column |
|
20 |
soil_frozen_water_content |
mrfso |
kg m-2 |
Z |
Z |
summed over all soil layers, and averaged over the land portion of the grid cell (i.e., compute by dividing the total mass of frozen water contained in the soil layer of the grid cell by the land area in the grid cell); report as "missing" or 0.0 where the land fraction is 0. |
|
21 |
surface_runoff_flux_where_land |
mrros |
kg m-2 s-1 |
Z |
Z |
compute as the total surface runoff leaving the land portion of the grid cell divided by the land area in the grid cell; report as "missing" or 0.0 where the land fraction is 0. |
|
22 |
runoff_flux_where_land |
mrro |
kg m-2 s-1 |
Z |
Z |
compute as the total runoff (including "drainage" through the base of the soil model) leaving the land portion of the grid cell divided by the land area in the grid cell; report as "missing" or 0.0 where the land fraction is 0. |
|
23 |
surface_snow_amount_where_land |
snw |
kg m-2 |
Z |
E,Z |
compute as the mass of surface snow on the land portion of the grid cell divided by the land area in the grid cell; report as "missing" or 0.0 where the land fraction is 0; exclude snow on vegetation canopy or on sea ice. |
|
24 |
surface_snow_area_fraction_where_land |
snc |
% |
Z |
Z |
fraction of grid cell covered by snow that lies on land; exclude snow that lies on sea ice. |
|
25 |
surface_snow_melt_flux_where_land |
snm |
kg m-2 s-1 |
Z |
Z |
compute as the total surface melt water on the land portion of the grid cell divided by the land area in the grid cell; report as 0.0 for snow-free land regions; report as 0.0 or "missing" where the land fraction is 0. |
|
26 |
eastward_wind |
uas |
m s-1 |
Z |
Z |
near-surface (usually, 10 meters) eastward component of wind; the CMOR singleton dimension default value of 10 m can be overridden, if absolutely necessary, by redefining axis "height2". |
|
27 |
northward_wind |
vas |
m s-1 |
Z |
Z |
near-surface (usually, 10 meters) northward component of wind; the CMOR singleton dimension default value of 10 m can be overridden, if absolutely necessary, by redefining axis "height2". |
|
28 |
specific_humidity |
huss |
1 (i.e., dimen-sionless fraction) |
Z |
Z |
near-surface (usually, 2meters) specific humidity; the CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
29 |
toa_incoming_shortwave_flux |
rsdt |
W m-2 |
A, D, Z |
E, H, Z |
incident shortwave at the top of the atmosphere |
|
30 |
toa_outgoing_shortwave_flux |
rsut |
W m-2 |
A, D, Z |
E, H, Z |
at the top of the atmosphere |
|
31 |
toa_outgoing_longwave_flux |
rlut |
W m-2 |
A, D, Z |
E, H, Z |
at the top of the atmosphere (to be compared with satellite measurements) |
|
32 |
net_downward_radiative_flux_at_ top_of_atmosphere_model |
rtmt |
W m-2 |
A, D, Z |
E, H, Z |
i.e., at the top of that portion of the atmosphere where dynamics are explicitly treated by the model. |
|
33 |
net_downward_shortwave_flux_in_air |
rsntp |
W m-2 |
|
|
at 200 hPa only; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
34 |
net_upward_longwave_flux_in_air |
rlntp |
W m-2 |
|
|
at 200 hPa only; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
35 |
net_downward_shortwave_flux_in_ air_assuming_clear_sky |
rsntpcs |
W m-2 |
|
|
at 200 hPa only; method "2" is recommended for calculating clear-sky fluxes; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
36 |
net_upward_longwave_flux_in_ air_assuming_clear_sky |
rlntpcs |
W m-2 |
|
|
at 200 hPa only; method "2" is recommended for calculating clear-sky fluxes; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
37 |
surface_downwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsdscs |
W m-2 |
A,D,L,Z |
E, L, Z |
method "2" is recommended for calculating clear-sky fluxes |
|
38 |
surface_upwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsuscs |
W m-2 |
A,D,L,Z |
E, L, Z |
method "2" is recommended for calculating clear-sky fluxes |
|
39 |
surface_downwelling_longwave_flux_in_ air_assuming_clear_sky |
rldscs |
W m-2 |
A,D,L,Z |
E, L, Z |
method "2" is recommended for calculating clear-sky fluxes |
|
40 |
toa_outgoing_longwave_flux_ assuming_clear_sky |
rlutcs |
W m-2 |
A, D, Z |
E, H, Z |
method "2" is recommended for calculating clear-sky fluxes |
|
41 |
toa_outgoing_shortwave_flux_ assuming_clear_sky |
rsutcs |
W m-2 |
A, D, Z |
E, H, Z |
method "2" is recommended for calculating clear-sky fluxes |
|
42 |
cloud_area_fraction |
clt |
% |
A, Z |
E, Z |
for the whole atmospheric column, as seen from the surface or the top of the atmosphere. Include both large-scale and convective cloud. |
|
43 |
atmosphere_cloud_condensed_water_content |
clwvi |
kg m-2 |
Z |
Z |
include both liquid and ice phases, consider all the mass of condensed water in the column and divide by its area (in the longitude-latitude plane) |
|
44 |
atmosphere_cloud_ice_content |
clivi |
kg m-2 |
Z |
Z |
consider all the mass of condensed water in the column and divide by its area (in the longitude-latitude plane) |
|
45 |
water_evaporation_flux |
evspsbl |
kg m-2 s-1 |
L, Z |
L, Z |
includes conversion to vapor phase from both the liquid and solid phase (i.e., includes sublimation) |
|
46 |
air_temperature |
tasmax |
K |
Z |
Z |
monthly mean (or time-mean for perpetual July simulations) of the daily-maximum near-surface (usually, 2 meter) air temperature. Consistent with the CF-conventions, the cell_methods attribute should specify "time: maximum within days time: mean over days" (automatically done by CMOR); The CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
47 |
air_temperature |
tasmin |
K |
Z |
Z |
monthly mean (or time-mean for perpetual July simulations) of the daily-minimum near-surface (usually, 2 meter) air temperature. Consistent with the CF-conventions, the cell_methods attribute should specify "time: minimum within days time: mean over days" (automatically done by CMOR); The CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
48 |
sea_ice_area_fraction |
sic |
% |
Z |
E, Z |
fraction of grid cell covered by sea ice. |
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
isccp_cloud_area_fraction |
clisccp |
1 (i.e., dimensionless fraction) |
A |
E |
as seen from above, mean fraction of grid column occupied by cloud of optical depths and heights specified by the tau and pressure intervals given above; for each longitude and latitude grid column, the ISCCP simulator output comprises a 7x7 (pressure x tau) matrix of values matching those of the satellite. With CMOR, use "pressure2" to define the vertical coordinates for this variable. |
The following tables (CF1c and CF1d) request diagnostics on pressure levels and model levels respectively. In some cases, the same diagnostic appears in both tables (with the output variable name ending in ‘m’ in CF1d to avoid confusion). For these diagnostics there is no need to submit the field both on model levels and pressure levels. If possible the data should be submitted on model levels, otherwise data on pressure levels is acceptable.
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
air_temperature |
ta |
K |
D, L, Z |
E, L, Z |
|
|
2 |
eastward_wind |
ua |
m s-1 |
Z |
E, Z |
|
|
3 |
northward_wind |
va |
m s-1 |
Z |
E, Z |
|
|
4 |
specific_humidity |
hus |
1 (i.e., dimensionless fraction) |
D, L, Z |
E, L, Z |
|
|
5 |
lagrangian_tendency_of_air_pressure |
wap |
Pa s-1 |
A, Z |
E, Z |
commonly referred to as "omega", this represents the vertical component of velocity in pressure coordinates (positive down) |
|
6 |
geopotential_height |
zg |
m |
Z |
Z |
|
|
7 |
relative_humidity |
hur |
% |
D, L, Z |
E, L, Z |
|
|
8 |
mole_fraction_of_o3_in_air |
tro3 |
1e-9 (i.e., ppbv) |
Z |
Z |
|
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
cloud_area_fraction_in_atmosphere_layer |
cl |
% |
A, Z |
E, Z |
Include both large-scale and convective cloud. |
|
2 |
mass_fraction_of_cloud_liquid_water_in_air |
clw |
1 (i.e., dimensionless mass fraction) |
A, Z |
E, Z |
divide mass of liquid water in the grid cell by mass of air in the grid cell. |
|
3 |
mass_fraction_of_cloud_ice_in_air |
cli |
1 (i.e., dimensionless mass fraction) |
A, Z |
E, Z |
divide mass of ice in the grid cell by mass of air in the grid cell. |
|
4 |
convective_cloud_area_fraction_in_atmosphere_layer |
clc |
% |
A |
E |
|
|
5 |
mass_fraction_of_convective_cloud_liquid_water_in_air |
clwc |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of liquid water in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
6 |
mass_fraction_of_convective_cloud_ice_in_air |
clic |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of ice in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
7 |
stratiform_cloud_area_fraction_in_atmosphere_layer |
cls |
% |
A |
E |
|
|
8 |
mass_fraction_of_stratiform_cloud_liquid_water_in_air |
clws |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of liquid water in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
9 |
mass_fraction_of_stratiform_cloud_ice_in_air |
clis |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of ice in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
10 |
air_temperature |
tam |
K |
D, L, Z |
E, L, Z |
As ta but on model levels. |
|
11 |
eastward_wind |
uam |
m s-1 |
Z |
E, Z |
As ua but on model levels. |
|
12 |
northward_wind |
vam |
m s-1 |
Z |
E, Z |
As va but on model levels. |
|
13 |
specific_humidity |
husm |
1 (i.e., dimensionless fraction) |
D, L, Z |
E, L, Z |
As hus but on model levels |
|
14 |
lagrangian_tendency_of_air_pressure |
wapm |
Pa s-1 |
A, Z |
E, Z |
As wap but on model levels. |
|
15 |
geopotential_height |
zgm |
m |
Z |
Z |
As zg but on model levels. |
|
16 |
relative_humidity |
hurm |
% |
D, L, Z |
E, L, Z |
As hur but on model levels. |
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
surface_altitude |
orog |
m |
all |
all |
height above the geoid; as defined here, "the geoid" is a surface of constant geopotential that, if the ocean were at rest, would coincide with mean sea level. Under this definition, the geoid changes as the mean volume of the ocean changes (e.g., due to glacial melt, or global warming of the ocean). Report here the height above the present-day geoid. |
|
2 |
land_area_fraction |
sftlf |
% |
all |
all |
|
|
3 |
land_ice_area_fraction |
sftgif |
% |
Z |
Z |
fraction of grid cell occupied by "permanent" ice (i.e., glaciers). |
|
4 |
soil_moisture_content_at_field_capacity |
mrsofc |
kg m-2 |
Z |
Z |
divide the total water holding capacity of all the soil in the grid cell by the land area in the grid cell; report as "missing" or 0.0 outside land areas. |
|
5 |
prescribed_heat_flux_into_slab_ocean |
qflux |
W m-2 |
|
E, F, G, H, I, J, L |
the so-called q-flux added to slab ocean cell, which is meant to account for convergence (or divergence) of heat by the ocean circulation. It should be computed as the total qflux energy added to the ocean-portion of the grid cell divided by the ocean area in the grid cell; report as "missing" or 0.0 where the ocean fraction is 0. The qflux should be time-independent. Omit for prescribed SST experiments. |
For slab ocean runs, annual mean data should be reported for each year simulated (including spin-up). No annual means are requested from prescribed SST experiments.
|
|
CF standard_name |
output variable name |
units |
Slab analysis pack-ages |
notes |
|
1 |
precipitation_flux |
pr |
kg m-2 s-1 |
J |
includes both liquid and solid phases. |
|
2 |
air_temperature |
tas |
K |
J |
near-surface (usually, 2 meter) air temperature; the CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
3 |
surface_upward_latent_heat_flux |
hfls |
W m-2 |
J |
|
|
4 |
surface_upward_sensible_heat_flux |
hfss |
W m-2 |
J |
|
|
5 |
surface_downwelling_longwave_flux_in_air |
rlds |
W m-2 |
J |
|
|
6 |
surface_upwelling_longwave_flux_in_air |
rlus |
W m-2 |
J |
|
|
7 |
surface_downwelling_shortwave_flux_in_air |
rsds |
W m-2 |
J |
|
|
8 |
surface_upwelling_shortwave_flux_in_air |
rsus |
W m-2 |
J |
|
|
9 |
surface_temperature |
ts |
K |
J |
"skin" temperature (i.e., SST for open ocean) |
|
10 |
atmosphere_water_vapor_content |
prw |
kg m-2 |
J |
vertically integrated through the atmospheric column |
|
11 |
toa_incoming_shortwave_flux |
rsdt |
W m-2 |
J |
incident shortwave at the top of the atmosphere |
|
12 |
toa_outgoing_shortwave_flux |
rsut |
W m-2 |
J |
at the top of the atmosphere |
|
13 |
toa_outgoing_longwave_flux |
rlut |
W m-2 |
J |
at the top of the atmosphere (to be compared with satellite measurements) |
|
14 |
net_downward_radiative_flux_at_top_of_ atmosphere_model |
rtmt |
W m-2 |
J |
i.e., at the top of that portion of the atmosphere where dynamics are explicitly treated by the model. |
|
15 |
net_downward_shortwave_flux_in_air |
rsntp |
W m-2 |
J |
at 200 hPa only; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
16 |
net_upward_longwave_flux_in_air |
rlntp |
W m-2 |
J |
at 200 hPa only; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
17 |
net_downward_shortwave_flux_in_ air_assuming_clear_sky |
rsntpcs |
W m-2 |
J |
at 200 hPa only; method "2" is recommended for calculating clear-sky fluxes; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
18 |
net_upward_longwave_flux_in_air_ assuming_clear_sky |
rlntpcs |
W m-2 |
J |
at 200 hPa only; method "2" is recommended for calculating clear-sky fluxes; the CMOR singleton dimension default value of 200 hPa can be overridden, if absolutely necessary, by redefining axis "pressure1". |
|
19 |
surface_downwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsdscs |
W m-2 |
J |
method "2" is recommended for calculating clear-sky fluxes |
|
20 |
surface_upwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsuscs |
W m-2 |
J |
method "2" is recommended for calculating clear-sky fluxes |
|
21 |
surface_downwelling_longwave_flux_in_ air_assuming_clear_sky |
rldscs |
W m-2 |
J |
method "2" is recommended for calculating clear-sky fluxes |
|
22 |
toa_outgoing_longwave_flux_ assuming_clear_sky |
rlutcs |
W m-2 |
J |
method "2" is recommended for calculating clear-sky fluxes |
|
23 |
toa_outgoing_shortwave_flux_ assuming_clear_sky |
rsutcs |
W m-2 |
J |
method "2" is recommended for calculating clear-sky fluxes |
|
24 |
sea_ice_area_fraction |
sic |
% |
J |
fraction of grid cell covered by sea ice. |
|
|
CF standard_name |
output variable name |
units |
Slab analysis packages |
notes |
|
1 |
isccp_cloud_area_fraction |
clisccp |
1 (i.e., dimensionless fraction) |
J |
as seen from above, mean fraction of grid column occupied by cloud of optical depths and heights specified by the tau and pressure intervals given above; for each longitude and latitude grid column, the ISCCP simulator output comprises a 7x7 (pressure x tau) matrix of values matching those of the satellite. With CMOR, use "pressure2" to define the vertical coordinates for this variable. |
For all simulations, report daily values only after model reaches equilibrium, and for slab runs only report 5 years of daily data.
|
|
CF standard_name |
output variable name |
units |
±2K analysis pack-ages |
Slab analysis pack-ages |
notes |
|
1 |
air_pressure_at_sea_level |
psl |
Pa |
B, C |
F, G |
|
|
2 |
precipitation_flux |
pr |
kg m-2 s-1 |
|
|
includes both liquid and solid phases. |
|
3 |
air_temperature |
tasmin |
K |
|
|
daily-minium near-surface (usually, 2 meter) air temperature. Consistent with the CF-conventions, the cell_methods attribute should specify "time: minimum" (automatically done by CMOR); The CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
4 |
air_temperature |
tasmax |
K |
|
|
daily-maximum near-surface (usually, 2 meter) air temperature. Consistent with the CF-conventions, the cell_methods attribute should specify "time: maximum" (automatically done by CMOR). The CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
5 |
air_temperature |
tas |
K |
B, C |
F, G |
daily-mean near-surface (usually, 2 meter) air temperature; The CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
6 |
surface_upward_latent_heat_flux |
hfls |
W m-2 |
B, L |
F, L |
|
|
7 |
surface_upward_sensible_heat_flux |
hfss |
W m-2 |
B, L |
F, L |
|
|
8 |
surface_downwelling_longwave_flux_in_air |
rlds |
W m-2 |
B, L |
F, L |
|
|
9 |
surface_upwelling_longwave_flux_in_air |
rlus |
W m-2 |
B, L |
F, L |
|
|
10 |
surface_downwelling_shortwave_flux_in_air |
rsds |
W m-2 |
B, L |
F, L |
|
|
11 |
surface_upwelling_shortwave_flux_in_air |
rsus |
W m-2 |
B, L |
F, L |
|
|
12 |
eastward_wind |
uas |
m s-1 |
|
|
near-surface (usually, 10 meters) eastward component of wind. The CMOR singleton dimension default value of 10 m can be overridden, if absolutely necessary, by redefining axis "height2". |
|
13 |
northward_wind |
vas |
m s-1 |
|
|
near-surface (usually, 10 meters) northward component of wind. The CMOR singleton dimension default value of 10 m can be overridden, if absolutely necessary, by redefining axis "height2". |
|
14 |
toa_outgoing_longwave_flux |
rlut |
W m-2 |
B, C |
F, G |
at the top of the atmosphere (to be compared with satellite measurements) |
|
15 |
surface_temperature |
ts |
K |
B, C |
F, G |
"skin" temperature (i.e., SST for open ocean) |
|
16 |
surface_air_pressure |
ps |
Pa |
B, C |
F, G |
not mean sea-level pressure |
|
17 |
specific_humidity |
huss |
1 (i.e., dimen-sionless fraction) |
B, C |
F, G |
near-surface (usually, 2meters) specific humidity; the CMOR singleton dimension default value of 2 m can be overridden, if absolutely necessary, by redefining axis "height1". |
|
18 |
toa_incoming_shortwave_flux |
rsdt |
W m-2 |
B, C |
F, G |
incident shortwave at the top of the atmosphere |
|
19 |
toa_outgoing_shortwave_flux |
rsut |
W m-2 |
B, C |
F, G |
at the top of the atmosphere |
|
20 |
net_downward_radiative_flux_at_ top_of_atmosphere_model |
rtmt |
W m-2 |
B, C |
F, G |
i.e., at the top of that portion of the atmosphere where dynamics are explicitly treated by the model. |
|
21 |
surface_downwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsdscs |
W m-2 |
B, L |
F, L |
method "2" is recommended for calculating clear-sky fluxes |
|
22 |
surface_upwelling_shortwave_flux_in_ air_assuming_clear_sky |
rsuscs |
W m-2 |
B, L |
F, L |
method "2" is recommended for calculating clear-sky fluxes |
|
23 |
surface_downwelling_longwave_flux_in_ air_assuming_clear_sky |
rldscs |
W m-2 |
B, L |
F, L |
method "2" is recommended for calculating clear-sky fluxes |
|
24 |
toa_outgoing_longwave_flux_ assuming_clear_sky |
rlutcs |
W m-2 |
B, C |
F, G |
method "2" is recommended for calculating clear-sky fluxes |
|
25 |
toa_outgoing_shortwave_flux_ assuming_clear_sky |
rsutcs |
W m-2 |
B, C |
F, G |
method "2" is recommended for calculating clear-sky fluxes |
|
26 |
cloud_area_fraction |
clt |
% |
B, C |
F, G |
for the whole atmospheric column, as seen from the surface or the top of the atmosphere. Include both large-scale and convective cloud. |
|
27 |
surface_snow_amount_where_land |
snw |
kg m-2 |
B, C |
F, G |
THIS IS NOT REQUIRED DAILY IF SNC IS SUBMITTED DAILY. Compute as the mass of surface snow on the land portion of the grid cell divided by the land area in the grid cell; report as "missing" or 0.0 where the land fraction is 0; exclude snow on vegetation canopy or on sea ice. |
|
28 |
surface_snow_area_fraction_where_land |
snc |
% |
B, C |
F, G |
fraction of grid cell covered by snow that lies on land; exclude snow that lies on sea ice. |
|
29 |
sea_ice_area_fraction |
sic |
% |
B, C |
F, G |
fraction of grid cell covered by sea ice. |
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
isccp_cloud_area_fraction |
clisccp |
1 (i.e., dimensionless fraction) |
B |
F |
as seen from above, mean fraction of grid column occupied by cloud of optical depths and heights specified by the tau and pressure intervals given above; for each longitude and latitude grid column, the ISCCP simulator output comprises a 7x7 (pressure x tau) matrix of values matching those of the satellite. With CMOR, use "pressure2" to define the vertical coordinates for this variable. |
The following tables (CF3c and CF3d) request diagnostics on pressure levels and model levels respectively. In some cases, the same diagnostic appears in both tables (with the output variable name ending in ‘m’ in CF3d to avoid confusion). For these diagnostics there is no need to submit the field both on model levels and pressure levels. If possible the data should be submitted on model levels, otherwise data on pressure levels is acceptable.
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
air_temperature |
ta |
K |
B, L |
F, L |
|
|
2 |
eastward_wind |
ua |
m s-1 |
B |
F |
|
|
3 |
northward_wind |
va |
m s-1 |
B |
F |
|
|
4 |
specific_humidity |
hus |
1 (i.e., dimensionless fraction) |
B, L |
F, L |
|
|
5 |
lagrangian_tendency_of_air_pressure |
wap |
Pa s-1 |
A, Z |
E, Z |
commonly referred to as "omega", this represents the vertical component of velocity in pressure coordinates (positive down) |
|
6 |
geopotential_height |
zg |
m |
Z |
Z |
|
|
7 |
relative_humidity |
hur |
% |
B, L |
F, L |
|
|
|
CF standard_name |
output variable name |
units |
±2K analysis packages |
Slab analysis packages |
notes |
|
1 |
cloud_area_fraction_in_atmosphere_layer |
cl |
% |
B |
F |
Include both large-scale and convective cloud. |
|
2 |
mass_fraction_of_cloud_liquid_water_in_air |
clw |
1 (i.e., dimensionless mass fraction) |
B |
F |
divide mass of liquid water in the grid cell by mass of air in the grid cell. |
|
3 |
mass_fraction_of_cloud_ice_in_air |
cli |
1 (i.e., dimensionless mass fraction) |
B |
F |
divide mass of ice in the grid cell by mass of air in the grid cell. |
|
4 |
convective_cloud_area_fraction_in_atmosphere_layer |
clc |
% |
B |
F |
|
|
5 |
mass_fraction_of_convective_cloud_liquid_water_in_air |
clwc |
1 (i.e., dimensionless mass fraction) |
B |
F |
divide mass of liquid water in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
6 |
mass_fraction_of_convective_cloud_ice_in_air |
clic |
1 (i.e., dimensionless mass fraction) |
B |
F |
divide mass of ice in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
7 |
stratiform_cloud_area_fraction_in_atmosphere_layer |
cls |
% |
A |
E |
|
|
8 |
mass_fraction_of_stratiform_cloud_liquid_water_in_air |
clws |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of liquid water in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
9 |
mass_fraction_of_stratiform_cloud_ice_in_air |
clis |
1 (i.e., dimensionless mass fraction) |
A |
E |
divide mass of ice in the convective cloud portion of the grid cell by mass of air in the entire grid cell. |
|
10 |
air_temperature |
tam |
K |
D, L, Z |
E, L, Z |
As ta but on model levels. |
|
11 |
eastward_wind |
uam |
m s-1 |
Z |
E, Z |
As ua but on model levels. |
|
12 |
northward_wind |
vam |
m s-1 |
Z |
E, Z |
As va but on model levels. |
|
13 |
specific_humidity |
husm |
1 (i.e., dimensionless fraction) |
D, L, Z |
E, L, Z |
As hus but on model levels |
|
14 |
lagrangian_tendency_of_air_pressure |
wapm |
Pa s-1 |
A, Z |
E, Z |
As wap but on model levels. |
|
15 |
geopotential_height |
zgm |
m |
Z |
Z |
As zg but on model levels. |
|
16 |
relative_humidity |
hurm |
% |
D, L, Z |
E, L, Z |
As hur but on model levels. |
For slab ocean experiments, a 12 month monthly mean climatology is requested, although an annual climatological mean would be acceptable. If fields are not available, please advise us of the global mean values.
|
|
CF standard_name |
output variable name |
units |
Slab analysis packages |
notes |
|
1 |
toa_adjusted_shortwave_forcing tropopause_adjusted_shortwave_forcing toa_instantaneous_shortwave_forcing tropopause_instantaneous_shortwave_forcing |
rsftoaa_co2 rsftropa_co2 rsftoai_co2 rsftropi_co2 |
W m-2 |
?? |
all-sky conditions, defined to be positive down. Choose appropriate variable, and indicate in the "comment" attribute (associated with the variable) any particulars (e.g., 200 hPa taken as approximate tropopause). For tropopause, CMOR will by default record a singleton dimension value of 200 hPa. To override this value redefine pressure1. |
|
2 |
toa_adjusted_longwave_forcing tropopause_adjusted_longwave_forcing toa_instantaneous_longwave_forcing tropopause_instantaneous_longwave_forcing |
rlftoaa_co2 rlftropa_co2 rlftoai_co2 rlftropi_co2 |
W m-2 |
?? |
all-sky conditions, defined to be positive down. Choose appropriate variable, and indicate in the "comment" attribute (associated with the variable) any particulars (e.g., 200 hPa taken as approximate tropopause). For tropopause, CMOR will by default record a singleton dimension value of 200 hPa. To override this value redefine pressure1. |
|
3 |
toa_adjusted_shortwave_forcing_ assuming_clear_sky tropopause_adjusted_shortwave_forcing_ assuming_clear_sky toa_instantaneous_shortwave_forcing_ assuming_clear_sky tropopause_instantaneous_shortwave_forcing_ assuming_clear_sky |
rsftoaacs_co2 rsftropacs_co2 rsftoaics_co2 rsftropics_co2 |
W m-2 |
?? |
clear-sky calculation, defined to be positive down. Choose appropriate variable, and indicate in the "comment" attribute (associated with the variable) any particulars (e.g., 200 hPa taken as approximate tropopause). For tropopause, CMOR will by default record a singleton dimension value of 200 hPa. To override this value redefine pressure1. |
|
4 |
toa_adjusted_longwave_forcing_ assuming_clear_sky tropopause_adjusted_longwave_forcing_ assuming_clear_sky toa_instantaneous_longwave_forcing_ assuming_clear_sky tropopause_instantaneous_longwave_forcing_ assuming_clear_sky |
rlftoaacs_co2 rlftropacs_co2 rlftoaics_co2 rlftropics_co2 |
W m-2 |
?? |
clear-sky calculation, defined to be positive down. Choose appropriate variable, and indicate in the "comment" attribute (associated with the variable) any particulars (e.g., 200 hPa taken as approximate tropopause). For tropopause, CMOR will by default record a singleton dimension value of 200 hPa. To override this value redefine pressure1. |
In the tables given above, variables are a function of various coordinate variables, which are stored in the netCDF files with the following names and units:
|
Table of Coordinate Dimensions. |
||||||
|
|
CF standard_name |
output coordinate variable name |
CMOR table "entry" I.D. |
units |
default value of scalar dimension |
notes |
|
1 |
longitude |
lon |
longitude |
degrees_east |
|
|
|
2 |
latitude |
lat |
latitude |
degrees_north |
|
|
|
3 |
time |
time |
time |
days_since_?? |
|
where ?? should be specified in the form
year-month-day (e.g., days_since_1800-1-1). For perpetual July
experiments, set units to "days since |
|
5 |
||||||