VAR4X3.TXT     Description of 4x3 Climate Variables     2005/01/20

ALBP:  Planetary albedo (%); ALBP = 1 - RSPA/RSPI
ALBS:  Surface albedo (%); ALBS = 1 - RSSA/RSSI

CLDH:  High cloud cover (%) or percentage of time that the cloud top  
       pressure is less than 440 mb when the vertically integrated
       cloud optical depth is at least .75
CLDM:  Middle cloud cover (%) or percentage of time that the cloud top
       pressure is between 440 and 680 mb when the vertically 
       integrated cloud optical depth is at least .75; middle clouds
       may not be detected if there are higher clouds present
CLDL:  Low cloud cover (%) or percentage of time that the cloud top
       pressure is greater than 680 mb when the vertically integrated
       cloud optical depth is at least .75; low clouds may not be
       detected if there are higher clouds present
CLDOD: Vertically integrated cloud optical depth
CLDT:  Total cloud cover (%) or percentage of time that the vertically
       integrated cloud optical depth is at least .75;
       CLDT = CLDL + CLDM + CLDH

EVAP:  Composite evaporation (mm/day) or area weighted evaporation from
       each surface type

HOCT:  Converged ocean heat transport (W/m²)
HPRE:  Energy of precipitation (W/m²); includes sensible heat of 
       condensate and negative latent heat of melting for snow
HS:    Downward net heat flux at surface (W/m²);
       HS = RSSA - RTSE - HSEN - HWV + HPRE
HSEN:  Conductive sensible heat flux (W/m²) from surface to atmosphere
HWV:   Latent heat flux (W/m²) from surface to atmosphere; equals
       latent heat of vaporization at 0°C plus sensible heat of vapor

MIGI:  Ice accumulation on glacial ice (kg/year*m²); positive when
       excess snow is compacted into ice; negative when ice is melted
MISG:  Surface ice (kg/m²) over ground
MLLAK: Liquid lake and river mass (kg/m²)
MOSI:  Vertically integrated ocean mass plus sea ice mass (10³ kg/m²)
MRVR:  Mass outflow by rivers (10^6 kg/s) from a cell to its downstream
       neighbor
MSALT: Vertically integrated ocean salt (10³ kg/m²)
MSI:   Sea ice mass (kg/m²)
MSNOW: Snow mass (kg/m²)
MSWG:  Mass of soil water (kg/m²) over ground
MWV:   Vertically integrated water vapor mass (kg/m²)

PREC:  Precipitation (mm/day)
PRECNV:Convective precipitation (mm/day)
PS:    Surface pressure (mb) at bottom of atmosphere
PSL:   Sea level pressure (mb) calculated from surface pressure and
       surface air temperature using using Trenberth et al. [1993]
       formula

Q200:  Specific humidity (g/kg) at 200 mb
Q500:  Specific humidity (g/kg) at 500 mb
Q850:  Specific humidity (g/kg) at 850 mb
QS:    Surface air specific humidity (g/kg)

RSPA:  Solar radiation absorbed by planet (W/m²)
RSSA:  Solar radiation absorbed by surface (W/m²)
RSSI:  Solar radiation incident on surface (W/m²)
RTSD:  Thermal radiation downward onto surface (W/m²)
RTPE:  Thermal radiation emitted by planet (W/m²)
RTSE:  Net thermal radiation emitted by surface (W/m²);
       RTSE = RTSU - RTSD
RTSU:  Thermal radiation upward from surface (W/m²)
RUNS:  Surface source runoff (mm/day) over land
RUNT:  Total source runoff (mm/day) over land

SIC:   Horizontal sea ice cover (%); over continental grid cells, it is
       the horizontal ratio of the lake ice cover over the lake
SNOWC: Composite snow cover (%) or area weighted snow cover from each
       surface type
SOS:   Ocean surface salinity (psu)

T200:  Air temperature (°C) at 200 mb
T500:  Air temperature (°C) at 500 mb
T850:  Air temperature (°C) at 850 mb
TG:    Ground temperature (°C); over ocean grid cells, it is the
       composite area weighted upper most temperature of open ocean or
       sea ice; over continental grid cells, it is the composite area
       weighted upper most temperature of ground, glacial ice, open
       lake, or lake ice
TG4:   Temperature (°C) of fourth ground layer (3.3 m) or fourth sea
       ice layer
TS:    Near surface air temperature (°C)
TSDV:  Daily variation of near surface air temperature (°C);
       TSDV = TSMAX - TSMIN
TSMAX: Daily maximum near surface air temperature (°C)
TSMIN: Daily minimum near surface air temperature (°C)
TOS:   Ocean surface temperature (°C) or temperature of upper most
       liquid ocean layer which is about 12 m thick

UMO:   Vertically integrated liquid ocean mass flux (10^6 kg/s) leaving
       a grid cell along its eastern edge (negative if entering)
VMO:   Vertically integrated liquid ocean mass flux (10^6 kg/s) leaving
       a grid cell along its northern edge (negative if entering)

UMSI:  Sea ice mass flux (10^6 kg/s) leaving a grid cell along its
       eastern edge (negative if entering)
VMSI:  Sea ice mass flux (10^6 kg/s) leaving a grid cell along its
       northern edge (negative if entering)

UMWV:  Vertically integrated water vapor mass flux (10^6 kg/s) leaving
       a grid cell along its eastern edge (negative if entering)
VMWV:  Vertically integrated water vapor mass flux (10^6 kg/s) leaving
       a grid cell along its northern edge (negative if entering)

WS:    Surface wind speed (m/s)

Z200:  Geopotential height (m) at 200 mb
Z500:  Geopotential height (m) at 500 mb
Z850:  Geopotential height (m) at 850 mb
ZOBL:  Ocean boundary layer depth (m)
ZOSI:  Ocean and sea ice surface height (mm) above reference mean sea
       level; should be interpreted by subtracting control simulation
       from experiment