<html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>CCSM/PCM atm monthly and daily xwalk to CMIP Standard Output</title>
<style ="color: rgb(0, 0, 0);"></style>
<style ="color: rgb(255, 0, 0);"></style>
</head>
<body>

CCSM/PCM ATM crosswalk to the PCMDI IPCC Standard Output Requirements

<h4 style="color: rgb(0, 0, 0);">Initial draft: LB March 24 2004
Corrections: LB March 25 2004
<span style="color: rgb(255, 0, 0);">Additions/corrections: GS August 13 2004, September 28 2004</span></h4>

Overview

The following tables were extracted from the <a href="http://www-pcmdi.llnl.gov/ipcc/standard_output.html">PCMDI IPCC
standard Output requirements</a> document dated 20 July 2004.
Each table a column listing the CCSM and PCM atmosphere model history variables needed to generate the corresponding PCMDI field.

Monthly mean and time-independent data


<caption> Monthly Mean Atmosphere + Land Surface 2-D (latitude, longitude) Data </caption><tbody>

CF Standard name CAM/CCM3 name CAM/CCM3 units CF name CF units
1 air_pressure_at_sea_level PSL Pa psl Pa
2 precipitation_flux (PRECC+PRECL)*rH ~2~0 m s<sup>-1</sup> pr kg m<sup>-2</sup> s<sup>-1</sup>
3 air_temperature<sup>a</sup> TREFHT K tas K
6 surface_downward_eastward_stress TAUX Pa<sup></sup> tauu Pa
7 surface_downward_northward_stress TAUY Pa<sup></sup> tauv Pa
8 surface_snow_thickness SNOWHLND
SNOWHICE
m snd m
9 surface_upward_latent_heat_flux (Lv+Lf)*QFLX -
Lf10-3
(PRECC+PRECL)
hfls W m<sup>-2</sup>
10 surface_upward_sensible_heat_flux SHFLX W m<sup>-2</sup> hfss W m<sup>-2</sup>
11 surface_downwelling_longwave_flux 5.67e-8*TS<sup>4</sup>-FLNS W m<sup>-2</sup> rlds W m<sup>-2</sup>
12 surface_upwelling_longwave_flux 5.67e-8*TS<sup>4</sup> W m<sup>-2</sup> rlus W m<sup>-2</sup>
13 surface_downwelling_shortwave_flux FSDS W m<sup>-2</sup> rsds W m<sup>-2</sup>
14 surface_upwelling_shortwave_flux FSDS-FSNS W m<sup>-2</sup> rsus W m<sup>-2</sup>
15 surface_temperature TS K ts K
16 surface_air_pressure PS Pa ps Pa
17 snowfall_flux (PRECSC+PRECSL)*rH ~2~0 m s<sup>-1</sup> prsn kg m<sup>-2</sup> s<sup>-1</sup>
18 convective_precipitation_flux PRECC m s<sup>-1</sup> prc kg m<sup>-2</sup> s<sup>-1</sup>
19 atmosphere_water_vapor_content TMQ kg m<sup>-2</sup> prw kg m<sup>-2</sup>
28 specific_humidity<sup>d</sup> QREFHT kg kg<sup>-1</sup> huss kg kg<sup>-1</sup> 
31 toa_incoming_shortwave_flux SOLIN W m<sup>-2</sup> rsdt W m<sup>-2</sup>
32 toa_outgoing_shortwave_flux SOLIN-FSNTOA W m<sup>-2</sup> rsut W m<sup>-2</sup>
33 toa_outgoing_longwave_flux FLUT W m<sup>-2</sup> rlut W m<sup>-2</sup>
34 net_downward_radiative_flux_at_top_of_atmosphere_model FSNTOA-FLUT W m<sup>-2</sup> rtmt W m<sup>-2</sup>
35 surface_downwelling_shortwave_flux_assuming_clear_sky FSDSC W m<sup>-2</sup> rsdscs W m<sup>-2</sup>
36 surface_upwelling_shortwave_flux_assuming_clear_sky FSDSC-FSNSC W m<sup>-2</sup> rsuscs W m<sup>-2</sup>
37 surface_downwelling_longwave_flux_assuming_clear_sky SRFRAD-FSNSC W m<sup>-2</sup> rldscs W m<sup>-2</sup>
38 toa_outgoing_longwave_flux_assuming_clear_sky FLUTC W m<sup>-2</sup> rlutcs W m<sup>-2</sup>
39 toa_outgoing_shortwave_flux_assuming_clear_sky SOLIN-FSNTOAC W m<sup>-2</sup> rsutcs W m<sup>-2</sup>
40 cloud_area_fraction CLDTOT fraction clt percent
41 atmosphere_cloud_condensed_water_content TGCLDLWP g m<sup>-2</sup> clwvi kg m<sup>-2</sup>
42 atmosphere_cloud_ice_content TGCLDIWP g m<sup>-2</sup> clivi kg m<sup>-2</sup>

<sup>a</sup>Also known as "surface air temperature."
Distinguish from 3-D air temperature by specifying a size-one dimension
of
height with coordinate value 2 m,
or by including the CF-convention
"coordinates" attribute, containing the name of a scalar
coordinate variable for height with the value of 2 m.
<sup>b</sup>In the upper 0.1 m only.
<sup>c</sup>Total for all soil layers.
<sup>d</sup>Near-surface value.
Distinguish from 3-D distribution by specifying a size-one dimension of
height with coordinate value 10 m (for near-surface wind) or 2 m (for
near-surface humidity),
or by including the CF-convention "coordinates" attribute,
containing the name of a scalar coordinate variable for height
with the value of 10 or 2 m.

<caption> <b><i>Time-independent Land Surface 2-D (latitude,
longitude) Data</i></b> </caption><tbody>

CF Standard name CAM/CCM3 name CAM/CCM3 units CF name CF units
1 surface_altitude PHIS/g m<sup>-2 </sup>s<sup>-2</sup> orog m
2 land_area_fraction LANDFRAC*100 fraction sftlf percent
3 land_ice_area_fraction - sftgif percent
4 soil_moisture_content_at_field_capacity - mrsofc kg m<sup>-2</sup>


<caption> Monthly Mean Atmosphere 3-D Data<sup>a</sup>
</caption><tbody>

CF Standard name CAM/CCM3 name CAM/CCM3 units CF name CF units
1 cloud_area_fraction_in_atmosphere_layer CLOUD  fraction cl percent
2 air_temperature T K ta K
3 eastward_wind U m
s<sup>-1</sup>
ua m s<sup>-1</sup>
4 northward_wind V m
s<sup>-1</sup>
va m s<sup>-1</sup>
5 specific_humidity Q kg
kg<sup>-1</sup>
hus kg kg<sup>-1</sup>
6 omega OMEGA Pa
s<sup>-1</sup>
wap Pa s<sup>-1</sup>
7 geopotential_height Z3 m zg m
8 relative_humidity RELHUM percent hur percent
9 area_fraction_below_surface<sup>b</sup> - psbg percent
10 mole_fraction_of_o3_in_air 03 mol
mol<sup>-1</sup>
tro3 ppbv

<sup>a</sup>Except for the variable
cloud_area_fraction_in_atmosphere_layer, this data
must be provided on pressure levels. The set of pressure levels must
include at least the AMIP standard pressure levels (= NCEP reanalysis
levels):
1000, 925, 850, 700, 600, 500, 400, 300, 250, 200, 150, 100, 70, 50,
30, 20, 10 hPa.
_<sup>b</sup>_Fraction of the time that a pressure surface lies
below ground.

Daily mean and 3-hourly data


<i>NOTE:
The following daily mean data may be provided for a smaller time period
than the monthly means</i>:

<caption> Daily Mean Atmosphere 2-D (latitude, longitude) Data
</caption><tbody>

CF Standard name CAM/CCM3 name CAM/CCM3 units CF name CF units
1 air_pressure_at_sea_level PSL Pa psl Pa
2 precipitation_flux (PRECC+PRECL)rH20 m s<sup>-1</sup> pr kg m<sup>-2</sup> s<sup>-1</sup>
3 air_temperature<sup>a, b</sup> TREFHTMN K tasmin K
4 air_temperature<sup>a, c</sup> TREFHTMX K tasmax K
5 air_temperature<sup>a</sup> TREFHT

K

tas K
6 surface_upward_latent_heat_flux (Lv+Lf)*QFLX -
Lf10-3(
PRECC+PRECL)
W m<sup>-2</sup> hfls W m<sup>-2</sup>
7 surface_upward_sensible_heat_flux SHFLX W m<sup>-2</sup> hfss W m<sup>-2</sup>
8 surface_downwelling_longwave_flux 5.67e-8*TS<sup>4</sup>-FLNS W m<sup>-2</sup> rlds W m<sup>-2</sup>
9 surface_upwelling_longwave_flux 5.67e-8*TS<sup>4</sup> W m<sup>-2</sup> rlus W m<sup>-2</sup>
10 surface_downwelling_shortwave_flux FSDS W m<sup>-2</sup> rsds W m<sup>-2</sup>
11 surface_upwelling_shortwave_flux FSDS-FSNS W m<sup>-2</sup> rsus W m<sup>-2</sup>
14 toa_outgoing_longwave_flux FLUT W m<sup>-2</sup> rlut W m<sup>-2</sup>

<sup>a</sup>Also known as "surface air temperature."
Distinguish from 3-D air temperature by specifying a size-one dimension
of
height with coordinate value 2 m,
or by including the CF-convention
"coordinates" attribute, containing the name of a scalar
coordinate variable for height with the value of 2 m.
<sup>b</sup>Daily minimum value. Designate by a cell_methods
attribute specifying "time: minimum within days,"
where "time" is the name of the time dimension.
<sup>c</sup>Daily maximum value.
Designate by a cell_methods attribute specifying "time: maximum within
days,"
where "time" is the name of the time dimension.
<sup>d</sup>Near-surface value.
Distinguish from 3-D distribution by specifying a size-one dimension of
height with coordinate value 10 m,
or by including the CF-convention "coordinates" attribute,
containing the name of a scalar coordinate variable for height
with the value of 10 m.

<caption> Daily Mean Atmosphere 3-D Data<sup>a</sup>
</caption><tbody>

CF Standard name CAM/CCM3 name CAM/CCM3 units CF name CF units
1 air_temperature T K ta K
2 eastward_wind U m s<sup>-1</sup> ua m s<sup>-1</sup>
3 northward_wind V m s<sup>-1</sup> va m s<sup>-1</sup>
4 specific_humidity Q m s<sup>-1</sup> hus kg kg<sup>-1</sup> 

<sup>a</sup>
This data must be provided on pressure levels.
The set of pressure levels must include at least the following subset
of AMIP standard pressure levels:
1000, 925, 850, 700, 600, 500, 400, 300, 200 hPa.
<i>NOTE:
The following 3-hourly data may be provided for a smaller time period
than the daily means
but must extend for at least 1 year.
3-hourly precipitation should be an average; other 3-hourly data should
be instantaneous "snapshots"</i>:

<caption> <b>3-hourly 2-D (latitude, longitude) Data
(at 0, 3, 6, 9, 12, 15, 18, 21 Z):</b> </caption><tbody>

CF Standard name CAM name CAM units CF name CF units
1 air_pressure_at_sea_level PSL Pa psl Pa
2 precipitation_flux (PRECC+PRECL)*rH20 m s<sup>-1</sup> pr kg m<sup>-2</sup> s<sup>-1</sup>
3 air_temperature<sup>a</sup> TREFHT K tas K
4 surface_upward_latent_heat_flux (Lv+Lf)*QFLS -
Lf10-3
(PRECC+PRECL)
W m<sup>-2</sup> hfls W m<sup>-2</sup>
5 surface_upward_sensible_heat_flux SHFLX W m<sup>-2</sup> hfss W m<sup>-2</sup>
6 surface_downwelling_longwave_flux SRFRAD-FSNS W m<sup>-2</sup> rlds W m<sup>-2</sup>
7 surface_upwelling_longwave_flux 5.67e-8*TS<sup>4</sup> W m<sup>-2</sup> rlus W m<sup>-2</sup>
8 surface_downwelling_shortwave_flux FSDS W m<sup>-2</sup> rsds W m<sup>-2</sup>
9 surface_upwelling_shortwave_flux FSDS-FSNS W m<sup>-2</sup> rsus W m<sup>-2</sup>

<sup>a</sup>Also known as "surface air temperature."
Distinguish from 3-D air temperature by specifying a size-one dimension of height with coordinate value 2 m, or by including the CF-convention "coordinates" attribute, containing the name of a scalar coordinate variable for height with the value of 2 m.

</body>
</html>

  • No labels