Full pathname of land fraction data file.

Full pathname of land-ice mask data file (on lnd grid).

Full pathname of initial conditions file. If blank CLM will startup from
arbitrary initial conditions.

Full pathname of topography data file. Only required when 
land-ice model is active.

Full pathname datafile with plant function type (PFT) constants

Full pathname of time varying PFT data file. This causes the land-use types of
the initial surface dataset to vary over time.

SNICAR (SNow, ICe, and Aerosol Radiative model) snow aging data file name

SNICAR (SNow, ICe, and Aerosol Radiative model) optical data file name

Full pathname of surface data file.

Mapping method from Lightning input file to the model resolution
    bilinear = bilinear interpolation
    nn       = nearest neighbor
    nnoni    = nearest neighbor on the "i" (longitude) axis
    nnonj    = nearest neighbor on the "j" (latitude) axis
    spval    = set to special value
    copy     = copy using the same indices

Simulation year that aligns with stream_year_first_lightng value

Simulation year that aligns with stream_year_first_ndep value

Simulation year that aligns with stream_year_first_popdens value

Mapping method from Nitrogen deposition input file to the model resolution
    bilinear = bilinear interpolation
    nn       = nearest neighbor
    nnoni    = nearest neighbor on the "i" (longitude) axis
    nnonj    = nearest neighbor on the "j" (latitude) axis
    spval    = set to special value
    copy     = copy using the same indices

Mapping method from human population density input file to the model resolution
    bilinear = bilinear interpolation
    nn       = nearest neighbor
    nnoni    = nearest neighbor on the "i" (longitude) axis
    nnonj    = nearest neighbor on the "j" (latitude) axis
    spval    = set to special value
    copy     = copy using the same indices

Filename of input stream data for Lightning

Filename of input stream data for Nitrogen Deposition

Filename of input stream data for human population density

First year to loop over for Lightning data

First year to loop over for Nitrogen Deposition data

First year to loop over for human population density data

Last year to loop over for Lightning data

Last year to loop over for Nitrogen Deposition data

Last year to loop over for human population density data

Visible and Near-infrared albedo's for glacier ice

Atmospheric CO2 molar ratio (by volume) only used when co2_type==constant (umol/mol)
(Set by CCSM_CO2_PPMV)

Type of CO2 feedback.
    constant   = use the input co2_ppmv value
    prognostic = use the prognostic value sent from the atmosphere
    diagnostic = use the diagnostic value sent from the atmosphere

If TRUE, separate the vegetated landunit into a crop landunit and a natural vegetation landunit

Time step (seconds)

If TRUE, dynamically change topographic height over glacier points.
Only works when glc_nec is greater than zero.
(EXPERIMENTAL AND NOT FUNCTIONAL!)

Glacier model grid
    gland20  = Greenland at 20km resolution
    gland10  = Greenland at 10km resolution
    gland5   = Greenland at  5km resolution
    gland5UM = Greenland at  5km resolution, using new UMontana ice sheet data for present day Greenland

If TRUE, calculate surface mass balance for glacier multi-elevation class points.
If false use growing degree day information for glaciers multi-elevation class points.
Only works when glc_nec is greater than 0.
(Only tested with glc_smb=.true., setting it to .false. is NOT tested)

If surface water is active or not
(deprecated -- will be removed)

If TRUE, irrigation will be active.

Number of  multiple elevation classes over glacier points.
Normally this is ONLY used when running CESM with the active glacier model.

If TRUE, run with an increased number of soil layers
Interpolate the soil layers on the surface dataset to the soil layers specified in iniTimeConst
(EXPERIMENTAL)

Use old snow cover fraction from Niu et al. 2007
(deprecated -- will be removed)

Use original CLM4 soil hydraulic properties
(deprecated -- will be removed)

Perturbation limit when doing error growth test

Subgrid fluxes for snow

Supplemental Nitrogen mode and for what type of vegetation it's turned on for. 
In this mode Nitrogen is unlimited rather than prognosed and in general vegetation is 
over-productive.
    NONE           = No vegetation types get supplemental Nitrogen
    ALL            = Supplemental Nitrogen is active for all vegetation types

Turn urban air conditioning/heating ON or OFF and add wasteheat:
    OFF          = Air conditioning/heating is OFF in buildings, internal temperature allowed to float freely
    ON           = Air conditioning/heating is ON in buildings, internal temperature constrained
    ON_WASTEHEAT = Air conditioning/heating is ON and waste-heat sent to urban canyon

If TRUE, urban traffic flux will be activated (Currently NOT implemented).

List of chemical constituents that dry deposition will be calculated for

Where dry deposition is calculated (from land, atmosphere, or from a table)

Full pathname of master restart file for a branch run. (only used if RUN_TYPE=branch)
(Set with RUN_REFCASE and RUN_REFDATE)

Override the start type from the driver: it can only be
set to 3 meaning branch.

If FALSE, don't write any restart files.

Clumps per processor.

number of segments per clump for decomposition

Default: 20

Per file averaging flag.
    'A' (average over history period)
    'I' (instantaneous)
    'X' (maximum over history period)
    'M' (minimum over history period)

If TRUE, implies output data on a 2D latitude/longitude grid. False means
output in 1D vector format.  One setting per history tape series.

If TRUE, indicates do NOT output any default history fields (requires you to use
hist_fincl* to set the exact output fields to use)..

Fields to exclude from history tape series 1.

Fields to exclude from history tape series  2.

Fields to exclude from history tape series  3.

Fields to exclude from history tape series  4.

Fields to exclude from history tape series  5.

Fields to exclude from history tape series  6.

Fields to add to history tape series  1.

Fields to add to history tape series  2.

Fields to add to history tape series  3.

Fields to add to history tape series  4.

Fields to add to history tape series  5.

Fields to add to history tape series  6.

Per tape series  maximum number of time samples.

Per tape series  history file density (i.e. output precision) 
    1=double precision
    2=single precision

Default: 2,2,2,2,2,2

Per tape series history write frequency. 
    positive means in time steps
    0=monthly
    negative means hours
(i.e. 5 means every 24 time-steps and -24 means every day

Default: 0,-24,-24,-24,-24,-24

Averaging type of output for 1D vector output (when hist_dov2xy is false).
    GRID means average all land-units up to the grid-point level
    LAND means average all columns up to the land-unit level
    COLS means average all PFT's up to the column level
    PFTS means report everything on native PFT level

If TRUE, add extra diagnostics for methane model to the history files

If TRUE, write diagnostic of global radiative temperature written to CLM log file.