Diagnostic quantities¶
The availability of a diagnostic depends on modeling choices. For example, the bed uplift
rate dbdt is available only if a bed deformation model is selected.
Some scalar diagnostics come in two versions: the one with the suffix _glacierized and
the one without. Here the former account for the ice
output.ice_free_thickness_standard meters or thicker (10 meters by default) and
the latter include all ice regardless of the thickness. “Glacierized” versions were added
to make it easier to analyze changes in glacier volumes and areas and exclude changes in
the seasonal snow cover.
Spatially-variable fields¶
air_temp_mean_summer- Units
Kelvin
- Description
mean summer near-surface air temperature used in the cosine yearly cycle
air_temp_sd- Units
Kelvin
- Description
standard deviation of near-surface air temperature
air_temp_snapshot- Units
Kelvin
- Description
instantaneous value of the near-surface air temperature
atmosphere_transmissivity- Units
1
- Description
atmosphere_transmissivity
basal_mass_flux_floating- Units
kg m-2 year-1
- Description
average basal mass flux over the reporting interval (floating areas)
- Comment
positive flux corresponds to ice gain
basal_mass_flux_grounded- Units
kg m-2 year-1
- Description
average basal mass flux over the reporting interval (grounded areas)
- Comment
positive flux corresponds to ice gain
basal_melt_rate_grounded- Units
m s-1
- Description
ice basal melt rate from energy conservation, in ice thickness per time (valid in grounded areas)
- Comment
positive basal melt rate corresponds to ice loss
bedtoptemp- Units
Kelvin
- Description
temperature at the top surface of the bedrock thermal layer
beta- Units
Pa s / m
- Description
basal drag coefficient
bfrict- Units
W m-2
- Description
basal frictional heating
bheatflx- Units
W m-2
- Description
upward geothermal flux at the bottom bedrock surface
- Comment
positive values correspond to an upward flux
bmelt- Units
m year-1
- Description
ice basal melt rate from energy conservation and subshelf melt, in ice thickness per time
- Standard name
land_ice_basal_melt_rate- Comment
positive basal melt rate corresponds to ice loss
bwat- Units
m
- Description
thickness of transportable subglacial water layer
bwatvelbwatvel[0]- Units
m s-1
- Description
velocity of water in subglacial layer, i-offset
bwatvel[1]- Units
m s-1
- Description
velocity of water in subglacial layer, j-offset
bwp- Units
Pa
- Description
pressure of transportable water in subglacial layer
bwprel- Units
1
- Description
pressure of transportable water in subglacial layer as fraction of the overburden pressure
cell_grounded_fraction- Units
—
- Description
fractional grounded/floating mask (floating=0, grounded=1)
climatic_mass_balance- Units
kg m-2 year-1
- Description
surface mass balance (accumulation/ablation) rate
- Standard name
land_ice_surface_specific_mass_balance_flux
cts- Units
1
- Description
cts = E/E_s(p), so cold-temperate transition surface is at cts = 1
dHdt- Units
m year-1
- Description
ice thickness rate of change
- Standard name
tendency_of_land_ice_thickness
dbdt- Units
m s-1
- Description
bedrock uplift rate
- Standard name
tendency_of_bedrock_altitude
debm_insolation_driven_melt_flux- Units
kg m-2 year-1
- Description
surface insolation melt, averaged over the reporting interval
debm_insolation_driven_melt_rate- Units
Gt year-1
- Description
surface insolation melt, averaged over the reporting interval
debm_offset_melt_flux- Units
kg m-2 year-1
- Description
offset melt, averaged over the reporting interval
debm_offset_melt_rate- Units
Gt year-1
- Description
offset melt, averaged over the reporting interval
debm_temperature_driven_melt_flux- Units
kg m-2 year-1
- Description
temperature-driven melt, averaged over the reporting interval
debm_temperature_driven_melt_rate- Units
Gt year-1
- Description
temperature-driven melt, averaged over the reporting interval
deviatoric_stressessigma_xx- Units
Pa
- Description
deviatoric stress in X direction
sigma_yy- Units
Pa
- Description
deviatoric stress in Y direction
sigma_xy- Units
Pa
- Description
deviatoric shear stress
diffusivity- Units
m2 s-1
- Description
diffusivity of SIA mass continuity equation
diffusivity_staggereddiffusivity_i- Units
m2 s-1
- Description
diffusivity of SIA mass continuity equation on the staggered grid (i-offset)
diffusivity_j- Units
m2 s-1
- Description
diffusivity of SIA mass continuity equation on the staggered grid (j-offset)
effbwp- Units
Pa
- Description
effective pressure of transportable water in subglacial layer (overburden pressure minus water pressure)
effective_air_temp- Units
Kelvin
- Description
effective mean-annual near-surface air temperature
effective_precipitation- Units
kg m-2 year-1
- Description
effective precipitation rate
- Standard name
precipitation_flux
effective_viscosity- Units
kPascal second
- Description
effective viscosity of ice
effective_water_velocityu_effective_water_velocity- Units
m day-1
- Description
x-component of the effective water velocity in the steady-state hydrology model
v_effective_water_velocity- Units
m day-1
- Description
y-component of the effective water velocity in the steady-state hydrology model
eigen_calving_rate- Units
m year-1
- Description
horizontal calving rate due to eigen-calving
elastic_bed_displacement- Units
meters
- Description
elastic part of the displacement in the Lingle-Clark bed deformation model; see [32]
enthalpy- Units
J kg-1
- Description
ice enthalpy (includes sensible heat, latent heat, pressure)
enthalpybase- Units
J kg-1
- Description
ice enthalpy at the base of ice
enthalpysurf- Units
J kg-1
- Description
ice enthalpy at 1m below the ice surface
firn_depth- Units
m
- Description
firn cover depth
fluxuflux- Units
m2 year-1
- Description
Vertically integrated horizontal flux of ice in the X direction
vflux- Units
m2 year-1
- Description
Vertically integrated horizontal flux of ice in the Y direction
flux_divergence- Units
m year-1
- Description
flux divergence
flux_mag- Units
m2 year-1
- Description
magnitude of vertically-integrated horizontal flux of ice
flux_staggeredflux_staggered[0]- Units
m2 year-1
- Description
fluxes through cell interfaces (sides) on the staggered grid (x-offset)
flux_staggered[1]- Units
m2 year-1
- Description
fluxes through cell interfaces (sides) on the staggered grid (y-offset)
frontal_melt_rate- Units
m day-1
- Description
frontal melt rate
frontal_melt_retreat_rate- Units
m year-1
- Description
retreat rate due to frontal melt
- Comment
takes into account what part of the front is submerged
grounding_line_flux- Units
kg m-2 year-1
- Description
grounding line flux
- Comment
Positive flux corresponds to mass moving from the ocean to an icy grounded area. This convention makes it easier to compare grounding line flux to the total discharge into the ocean
h_xh_x_i- Units
1
- Description
the x-component of the surface gradient, i-offset
h_x_j- Units
1
- Description
the x-component of the surface gradient, j-offset
h_yh_y_i- Units
1
- Description
the y-component of the surface gradient, i-offset
h_y_j- Units
1
- Description
the y-component of the surface gradient, j-offset
hardav- Units
Pa s^(1/n)
- Description
vertical average of ice hardness
- Comment
units depend on the Glen exponent used by the flow law
hardness- Units
Pa s^(1/n)
- Description
ice hardness computed using the SIA flow law
- Comment
units depend on the Glen exponent used by the flow law
heat_flux_from_bedrock- Units
mW m-2
- Description
upward geothermal flux at the top bedrock surface
- Standard name
upward_geothermal_heat_flux_at_ground_level_in_land_ice- Comment
positive values correspond to an upward flux
height_above_flotation- Units
m
- Description
ice thickness in excess of the maximum floating ice thickness
- Comment
shows how close to floatation the ice is at a given location
hydraulic_potential- Units
Pa
- Description
hydraulic potential in the subglacial hydrology system
hydraulic_potential_adjustment- Units
Pa
- Description
potential adjustment needed to fill sinks when computing an estimate of the steady-state hydraulic potential
hydraulic_sinks- Units
—
- Description
map of sinks in the domain (for debugging)
ice_area_specific_volume- Units
m3/m2
- Description
ice-volume-per-area in partially-filled grid cells
- Comment
this variable represents the amount of ice in a partially-filled cell and not the corresponding geometry, so thinking about it as ‘thickness’ is not helpful
ice_base_elevation- Units
m
- Description
ice bottom surface elevation
ice_margin_pressure_difference- Units
Pa
- Description
vertically-averaged pressure difference at ice margins (including calving fronts)
ice_mass- Units
kg
- Description
ice mass per cell
ice_surface_liquid_water_fraction- Units
1
- Description
ice liquid water fraction at the ice surface
ice_surface_temp- Units
K
- Description
ice temperature at the top ice surface
- Standard name
temperature_at_top_of_ice_sheet_model
insolation- Units
W m-2
- Description
mean top of atmosphere insolation during the period when the sun is above the critical angle Phi
isochronal_layer_thickness- Units
m
- Description
thicknesses of isochronal layers
isochrone_depth- Units
m
- Description
depth below surface of isochrones for times in ‘deposition_time’
lat- Units
degree_north
- Description
latitude
- Standard name
latitude
liqfrac- Units
1
- Description
liquid water fraction in ice (between 0 and 1)
lon- Units
degree_east
- Description
longitude
- Standard name
longitude
mask- Units
—
- Description
ice-type (ice-free/grounded/floating/ocean) integer mask
nuHnuH[0]- Units
kPa s m
- Description
ice thickness times effective viscosity, i-offset
nuH[1]- Units
kPa s m
- Description
ice thickness times effective viscosity, j-offset
pressure- Units
Pa
- Description
pressure in ice (hydrostatic)
rank- Units
1
- Description
processor rank
remaining_water_thickness- Units
m
- Description
scaled water thickness in the steady state hydrology model (has no physical meaning)
schoofs_theta- Units
1
- Description
multiplier ‘theta’ in Schoof’s (2003) theory of bed roughness in SIA
sea_level- Units
meters
- Description
sea level elevation, relative to the geoid
sftflf- Units
1
- Description
fraction of a grid cell covered by floating ice
- Standard name
floating_ice_shelf_area_fraction
sftgif- Units
1
- Description
fraction of a grid cell covered by ice (grounded or floating)
- Standard name
land_ice_area_fraction
sftgrf- Units
1
- Description
fraction of a grid cell covered by grounded ice
- Standard name
grounded_ice_sheet_area_fraction
shelfbmassflux- Units
kg m-2 s-1
- Description
mass flux at the basal surface of ice shelves
shelfbtemp- Units
Kelvin
- Description
ice temperature at the basal surface of ice shelves
snow_depth- Units
m
- Description
snow cover depth (set to zero once a year)
steady_state_hydraulic_potential- Units
Pa
- Description
estimate of the steady state hydraulic potential in the steady hydrology model
strain_rateseigen1- Units
s-1
- Description
first eigenvalue of the horizontal, vertically-integrated strain rate tensor
eigen2- Units
s-1
- Description
second eigenvalue of the horizontal, vertically-integrated strain rate tensor
strainheat- Units
mW m-3
- Description
rate of strain heating in ice (dissipation heating)
subglacial_water_flux_mag- Units
m2 year-1
- Description
magnitude of the subglacial water flux
subglacial_water_input_rate- Units
m year-1
- Description
water input rate from the ice surface into the subglacial water system
- Comment
positive flux corresponds to water gain
surface_accumulation_flux- Units
kg m-2 year-1
- Description
accumulation (precipitation minus rain), averaged over the reporting interval
surface_accumulation_rate- Units
Gt year-1
- Description
accumulation (precipitation minus rain), averaged over the reporting interval
surface_albedo- Units
1
- Description
surface_albedo
- Standard name
surface_albedo
surface_layer_mass- Units
kg
- Description
mass of the surface layer (snow and firn)
surface_layer_thickness- Units
meters
- Description
thickness of the surface layer (snow and firn)
surface_melt_flux- Units
kg m-2 year-1
- Description
surface melt, averaged over the reporting interval
- Standard name
surface_snow_and_ice_melt_flux
surface_melt_rate- Units
Gt year-1
- Description
surface melt, averaged over the reporting interval
surface_runoff_flux- Units
kg m-2 year-1
- Description
surface runoff, averaged over the reporting interval
- Standard name
surface_runoff_flux
surface_runoff_rate- Units
Gt year-1
- Description
surface runoff, averaged over the reporting interval
taubtaub_x- Units
Pa
- Description
X-component of the shear stress at the base of ice
- Comment
this field is purely diagnostic (not used by the model)
taub_y- Units
Pa
- Description
Y-component of the shear stress at the base of ice
- Comment
this field is purely diagnostic (not used by the model)
taub_mag- Units
Pa
- Description
magnitude of the basal shear stress at the base of ice
- Standard name
land_ice_basal_drag- Comment
this field is purely diagnostic (not used by the model)
tauc- Units
Pa
- Description
yield stress for basal till (plastic or pseudo-plastic model)
taudtaud_x- Units
Pa
- Description
X-component of the driving shear stress at the base of ice
- Comment
this is the driving stress used by the SSA solver
taud_y- Units
Pa
- Description
Y-component of the driving shear stress at the base of ice
- Comment
this is the driving stress used by the SSA solver
taud_mag- Units
Pa
- Description
magnitude of the driving shear stress at the base of ice
- Comment
this is the magnitude of the driving stress used by the SSA solver
tauxz- Units
Pa
- Description
shear stress xz component (in shallow ice approximation SIA)
tauyz- Units
Pa
- Description
shear stress yz component (in shallow ice approximation SIA)
temp- Units
K
- Description
ice temperature
- Standard name
land_ice_temperature
temp_pa- Units
deg_C
- Description
pressure-adjusted ice temperature (degrees above pressure-melting point)
tempbase- Units
K
- Description
ice temperature at the base of ice
- Standard name
land_ice_basal_temperature
tempicethk- Units
m
- Description
temperate ice thickness (total column content)
tempicethk_basal- Units
m
- Description
thickness of the basal layer of temperate ice
temppabase- Units
Celsius
- Description
pressure-adjusted ice temperature at the base of ice
tempsurf- Units
K
- Description
ice temperature at 1m below the ice surface
- Standard name
temperature_at_ground_level_in_snow_or_firn
tendency_of_ice_amount- Units
kg m-2 year-1
- Description
rate of change of the ice amount
tendency_of_ice_amount_due_to_basal_mass_flux- Units
kg m-2 year-1
- Description
average basal mass flux over reporting interval
- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_calving- Units
kg m-2 year-1
- Description
calving flux
- Standard name
land_ice_specific_mass_flux_due_to_calving- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_conservation_error- Units
kg m-2 year-1
- Description
average mass conservation error flux over reporting interval
- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_discharge- Units
kg m-2 year-1
- Description
discharge flux (calving, frontal melt, forced retreat)
- Standard name
land_ice_specific_mass_flux_due_to_calving_and_ice_front_melting- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_flow- Units
kg m-2 year-1
- Description
rate of change of ice amount due to flow
- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_forced_retreat- Units
kg m-2 year-1
- Description
forced (prescribed) retreat flux
- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_frontal_melt- Units
kg m-2 year-1
- Description
frontal melt flux
- Comment
positive flux corresponds to ice gain
tendency_of_ice_amount_due_to_surface_mass_flux- Units
kg m-2 year-1
- Description
average surface mass flux over reporting interval
- Standard name
land_ice_surface_specific_mass_balance_flux- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass- Units
Gt year-1
- Description
rate of change of the ice mass
tendency_of_ice_mass_due_to_basal_mass_flux- Units
Gt year-1
- Description
average basal mass flux over reporting interval
- Standard name
tendency_of_land_ice_mass_due_to_basal_mass_balance- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_calving- Units
Gt year-1
- Description
calving flux
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_conservation_error- Units
Gt year-1
- Description
average mass conservation error flux over reporting interval
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_discharge- Units
Gt year-1
- Description
discharge flux (calving, frontal melt, forced retreat)
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_flow- Units
Gt year-1
- Description
rate of change of ice mass due to flow
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_forced_retreat- Units
Gt year-1
- Description
forced (prescribed) retreat flux
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_frontal_melt- Units
Gt year-1
- Description
frontal melt flux
- Comment
positive flux corresponds to ice gain
tendency_of_ice_mass_due_to_surface_mass_flux- Units
Gt year-1
- Description
average surface mass flux over reporting interval
- Comment
positive flux corresponds to ice gain
tendency_of_subglacial_water_mass- Units
Gt year-1
- Description
rate of change of the total mass of subglacial water
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_at_domain_boundary- Units
Gt year-1
- Description
subglacial water flux at domain boundary (in regional model configurations)
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_at_grounded_margins- Units
Gt year-1
- Description
subglacial water flux at grounded ice margins
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_at_grounding_line- Units
Gt year-1
- Description
subglacial water flux at grounding lines
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_due_to_conservation_error- Units
Gt year-1
- Description
subglacial water flux due to conservation error (mass added to preserve non-negativity)
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_due_to_flow- Units
Gt year-1
- Description
rate of change subglacial water mass due to lateral flow
- Comment
positive flux corresponds to water gain
tendency_of_subglacial_water_mass_due_to_input- Units
Gt year-1
- Description
subglacial water flux due to input
- Comment
positive flux corresponds to water gain
thickness_calving_threshold- Units
m
- Description
threshold used by the ‘calving at threshold’ calving method
thk- Units
m
- Description
land ice thickness
- Standard name
land_ice_thickness
thk_bc_mask- Units
—
- Description
Mask specifying locations where ice thickness is held constant
thksmooth- Units
m
- Description
thickness relative to smoothed bed elevation in Schoof’s (2003) theory of bed roughness in SIA
tillphi- Units
degrees
- Description
friction angle for till under grounded ice sheet
tillwat- Units
m
- Description
effective thickness of subglacial water stored in till
topg- Units
m
- Description
bedrock surface elevation
- Standard name
bedrock_altitude
topg_sl_adjusted- Units
meters
- Description
sea-level adjusted bed topography (zero is at sea level)
topgsmooth- Units
m
- Description
smoothed bed elevation in Schoof’s (2003) theory of bed roughness in SIA
usurf- Units
m
- Description
ice top surface elevation
- Standard name
surface_altitude
uvel- Units
m year-1
- Description
horizontal velocity of ice in the X direction
- Standard name
land_ice_x_velocity
vel_bc_mask- Units
—
- Description
Mask prescribing Dirichlet boundary locations for the sliding velocity
vel_bc_valuesu_bc- Units
m s-1
- Description
X-component of the SSA velocity boundary conditions
v_bc- Units
m s-1
- Description
Y-component of the SSA velocity boundary conditions
velbarubar- Units
m year-1
- Description
vertical mean of horizontal ice velocity in the X direction
- Standard name
land_ice_vertical_mean_x_velocity
vbar- Units
m year-1
- Description
vertical mean of horizontal ice velocity in the Y direction
- Standard name
land_ice_vertical_mean_y_velocity
velbar_mag- Units
m year-1
- Description
magnitude of vertically-integrated horizontal velocity of ice
velbaseuvelbase- Units
m year-1
- Description
x-component of the horizontal velocity of ice at the base of ice
- Standard name
land_ice_basal_x_velocity
vvelbase- Units
m year-1
- Description
y-component of the horizontal velocity of ice at the base of ice
- Standard name
land_ice_basal_y_velocity
velbase_mag- Units
m year-1
- Description
magnitude of horizontal velocity of ice at base of ice
velsurfuvelsurf- Units
m year-1
- Description
x-component of the horizontal velocity of ice at ice surface
- Standard name
land_ice_surface_x_velocity
vvelsurf- Units
m year-1
- Description
y-component of the horizontal velocity of ice at ice surface
- Standard name
land_ice_surface_y_velocity
velsurf_mag- Units
m year-1
- Description
magnitude of horizontal velocity of ice at ice surface
viscous_bed_displacement- Units
meters
- Description
bed displacement in the viscous half-space bed deformation model; see BuelerLingleBrown
vonmises_calving_rate- Units
m year-1
- Description
horizontal calving rate due to von Mises calving
vonmises_calving_threshold- Units
Pa
- Description
threshold used by the ‘von Mises’ calving method
vonmises_stress- Units
Pascal
- Description
tensile von Mises stress
vvel- Units
m year-1
- Description
horizontal velocity of ice in the Y direction
- Standard name
land_ice_y_velocity
wallmelt- Units
m year-1
- Description
wall melt into subglacial hydrology layer from (turbulent) dissipation of energy in transportable water
wvel- Units
m year-1
- Description
vertical velocity of ice, relative to geoid
wvel_rel- Units
m year-1
- Description
vertical velocity of ice, relative to base of ice directly below
wvelbase- Units
m year-1
- Description
vertical velocity of ice at the base of ice, relative to the geoid
- Standard name
land_ice_basal_upward_velocity
wvelsurf- Units
m year-1
- Description
vertical velocity of ice at ice surface, relative to the geoid
- Standard name
land_ice_surface_upward_velocity
Scalar time-series¶
basal_mass_flux_floating- Units
Gt year-1
- Description
total sub-shelf ice flux
- Standard name
tendency_of_land_ice_mass_due_to_basal_mass_balance- Comment
positive means ice gain
basal_mass_flux_grounded- Units
Gt year-1
- Description
total over grounded ice domain of basal mass flux
- Standard name
tendency_of_land_ice_mass_due_to_basal_mass_balance- Comment
positive means ice gain
dt- Units
year
- Description
mass continuity time step
dt_ratio- Units
1
- Description
ratio of max. allowed time steps according to CFL and SIA diffusivity criteria
grounding_line_flux- Units
Gt year-1
- Description
total ice flux across the grounding line
- Comment
negative flux corresponds to ice loss into the ocean
ice_area_glacierized- Units
m2
- Description
glacierized area
ice_area_glacierized_cold_base- Units
m2
- Description
glacierized area where basal ice is cold
ice_area_glacierized_floating- Units
m2
- Description
area of ice shelves in glacierized areas
- Standard name
floating_ice_shelf_area
ice_area_glacierized_grounded- Units
m2
- Description
area of grounded ice in glacierized areas
- Standard name
grounded_ice_sheet_area
ice_area_glacierized_temperate_base- Units
m2
- Description
glacierized area where basal ice is temperate
ice_enthalpy- Units
J
- Description
enthalpy of the ice, including seasonal cover
ice_enthalpy_glacierized- Units
J
- Description
enthalpy of the ice in glacierized areas
ice_mass- Units
kg
- Description
mass of the ice, including seasonal cover
- Standard name
land_ice_mass
ice_mass_glacierized- Units
kg
- Description
mass of the ice in glacierized areas
ice_volume- Units
m3
- Description
volume of the ice, including seasonal cover
ice_volume_cold- Units
m3
- Description
volume of cold ice, including seasonal cover
ice_volume_glacierized- Units
m3
- Description
volume of the ice in glacierized areas
ice_volume_glacierized_cold- Units
m3
- Description
volume of cold ice in glacierized areas
ice_volume_glacierized_floating- Units
m3
- Description
volume of ice shelves in glacierized areas
ice_volume_glacierized_grounded- Units
m3
- Description
volume of grounded ice in glacierized areas
ice_volume_glacierized_temperate- Units
m3
- Description
volume of temperate ice in glacierized areas
ice_volume_temperate- Units
m3
- Description
volume of temperate ice, including seasonal cover
limnsw- Units
kg
- Description
mass of the ice not displacing sea water
- Standard name
land_ice_mass_not_displacing_sea_water
liquified_ice_flux- Units
m3 / year
- Description
rate of ice loss due to liquefaction, averaged over the reporting interval
- Comment
positive means ice loss
max_diffusivity- Units
m2 s-1
- Description
maximum diffusivity of the flow (usually from the SIA model)
max_horizontal_vel- Units
m year-1
- Description
max(max(abs(u)), max(abs(v))) for the horizontal velocity of ice over volume of the ice in last time step during time-series reporting interval
sea_level_rise_potential- Units
m
- Description
the sea level rise that would result if all the ice were melted
surface_accumulation_rate- Units
kg year-1
- Description
surface accumulation rate (PDD model)
surface_melt_rate- Units
kg year-1
- Description
surface melt rate (PDD model)
surface_runoff_rate- Units
kg year-1
- Description
surface runoff rate (PDD model)
tendency_of_ice_mass- Units
Gt year-1
- Description
rate of change of the mass of ice, including seasonal cover
tendency_of_ice_mass_due_to_basal_mass_flux- Units
Gt year-1
- Description
total over ice domain of bottom surface ice mass flux
- Standard name
tendency_of_land_ice_mass_due_to_basal_mass_balance- Comment
positive means ice gain
tendency_of_ice_mass_due_to_calving- Units
Gt year-1
- Description
calving flux
- Standard name
tendency_of_land_ice_mass_due_to_calving- Comment
positive means ice gain
tendency_of_ice_mass_due_to_conservation_error- Units
Gt year-1
- Description
total numerical flux needed to preserve non-negativity of ice thickness
- Comment
positive means ice gain
tendency_of_ice_mass_due_to_discharge- Units
Gt year-1
- Description
discharge flux (frontal melt, calving, forced retreat)
- Standard name
tendency_of_land_ice_mass_due_to_calving_and_ice_front_melting- Comment
positive means ice gain
tendency_of_ice_mass_due_to_flow- Units
Gt year-1
- Description
rate of change of the mass of ice due to flow (i.e. prescribed ice thickness)
tendency_of_ice_mass_due_to_surface_mass_flux- Units
Gt year-1
- Description
total over ice domain of top surface ice mass flux
- Standard name
tendency_of_land_ice_mass_due_to_surface_mass_balance- Comment
positive means ice gain
tendency_of_ice_mass_glacierized- Units
Gt year-1
- Description
rate of change of the ice mass in glacierized areas
tendency_of_ice_volume- Units
m3 year-1
- Description
rate of change of the ice volume, including seasonal cover
tendency_of_ice_volume_glacierized- Units
m3 year-1
- Description
rate of change of the ice volume in glacierized areas
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