MONARCHS grid variables

List of MONARCHS model grid variables. Generated automatically from the variable catalogue (monarchs.variables). run python scripts/gen_docs.py to regenerate!

Units broadly follow the CF conventions - see https://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/ch03.html for details.

Fixed values

`column`

Long name: Grid column index · Dim: scalar · Units: 1 · Default: from input

`row`

Long name: Grid row index · Dim: scalar · Units: 1 · Default: from input

`vert_grid`

Long name: Firn layer count · Dim: scalar · Units: 1 · Default: computed (n_firn)

`vert_grid_lake`

Long name: Lake layer count · Dim: scalar · Units: 1 · Default: computed (n_lake)

`vert_grid_lid`

Long name: Lid layer count · Dim: scalar · Units: 1 · Default: computed (n_lid)

`lat`

Long name: Latitude · Dim: scalar · Units: degrees_north · Default: nan

`lon`

Long name: Longitude · Dim: scalar · Units: degrees_east · Default: nan

`size_dx`

Long name: Cell size, east-west · Dim: scalar · Units: m · Default: 1000.0

`size_dy`

Long name: Cell size, north-south · Dim: scalar · Units: m · Default: 1000.0

`valid_cell`

Long name: Cell runs model physics (flag) · Dim: scalar · Units: 1 · Default: True

Firn

`firn_depth`

Long name: Firn column total depth · Dim: scalar · Units: m · Default: from input

`vertical_profile`

Long name: Depth of each firn layer · Dim: firn · Units: m · Default: computed (vertical_profile)

`firn_temperature`

Long name: Firn column temperature · Dim: firn · Units: K · Default: from input

`rho`

Long name: Firn density · Dim: firn · Units: kg m-3 · Default: from input

`Sfrac`

Long name: Solid (ice) volume fraction · Dim: firn · Units: 1 · Default: computed (sfrac_from_rho)

`Lfrac`

Long name: Liquid (water) volume fraction · Dim: firn · Units: 1 · Default: 0.0

`meltflag`

Long name: Meltwater present at layer (flag) · Dim: firn · Units: 1 · Default: 0.0

`saturation`

Long name: Layer saturated (flag) · Dim: firn · Units: 1 · Default: 0.0

`ice_lens`

Long name: Ice lens present (flag) · Dim: scalar · Units: 1 · Default: False

`ice_lens_depth`

Long name: Layer index of highest ice lens · Dim: scalar · Units: 1 · Default: computed (ice_lens_below_column)

Surface

`albedo`

Long name: Surface albedo · Dim: scalar · Units: 1 · Default: 0.0

`melt`

Long name: Surface melt this step (flag) · Dim: scalar · Units: 1 · Default: False

`exposed_water`

Long name: Exposed surface water (flag) · Dim: scalar · Units: 1 · Default: False

`total_melt`

Long name: Cumulative melt depth · Dim: scalar · Units: m · Default: 0.0

Lake

`lake`

Long name: Lake present (flag) · Dim: scalar · Units: 1 · Default: False

`lake_depth`

Long name: Melt lake depth · Dim: scalar · Units: m · Default: 0.0

`lake_temperature`

Long name: Lake temperature profile · Dim: lake · Units: K · Default: 273.15

Lid

`lid`

Long name: Frozen lid present (flag) · Dim: scalar · Units: 1 · Default: False

`lid_depth`

Long name: Frozen lid depth · Dim: scalar · Units: m · Default: 0.0

`lid_temperature`

Long name: Frozen lid temperature profile · Dim: lid · Units: K · Default: 273.15

`v_lid`

Long name: Virtual lid present (flag) · Dim: scalar · Units: 1 · Default: False

`v_lid_depth`

Long name: Virtual lid depth · Dim: scalar · Units: m · Default: 0.0

`virtual_lid_temperature`

Long name: Virtual lid temperature · Dim: scalar · Units: K · Default: 273.15

`has_had_lid`

Long name: Lid present this cycle (flag) · Dim: scalar · Units: 1 · Default: False

`lid_sfc_melt`

Long name: Tracked lid surface melt · Dim: scalar · Units: m · Default: 0.0

`lid_snow_depth`

Long name: Snow depth on the lid · Dim: scalar · Units: m · Default: 0.0

`snow_on_lid`

Long name: Snow-on-lid state (0/1/2) · Dim: scalar · Units: 1 · Default: 0

Lateral

`water`

Long name: Liquid water depth per layer (lateral flow) · Dim: firn · Units: m · Default: 0.0

`water_level`

Long name: Water-table height for lateral flow · Dim: scalar · Units: m · Default: 0.0

`water_direction`

Long name: Lateral outflow direction (0=NW..7=W) · Dim: directions · Units: 1 · Default: 0

Diagnostic

`firn_boundary_change`

Long name: Firn boundary change this day · Dim: scalar · Units: m · Default: 0.0

`lake_boundary_change`

Long name: Lake boundary change this day · Dim: scalar · Units: m · Default: 0.0

`lid_boundary_change`

Long name: Lid boundary change this day · Dim: scalar · Units: m · Default: 0.0

Counter

`melt_hours`

Long name: Cumulative surface-melt hours · Dim: scalar · Units: h · Default: 0

`lid_melt_count`

Long name: Lid melt-step counter · Dim: scalar · Units: 1 · Default: 0

`lake_refreeze_counter`

Long name: Lake refreeze counter · Dim: scalar · Units: 1 · Default: 0

`exposed_water_refreeze_counter`

Long name: Exposed-water refreeze counter · Dim: scalar · Units: 1 · Default: 0

`t_step`

Long name: Timestep within the current day · Dim: scalar · Units: 1 · Default: 0

`day`

Long name: Model day · Dim: scalar · Units: 1 · Default: 0

`visit_count`

Long name: Times this cell has been visited · Dim: scalar · Units: 1 · Default: 0

Internal

`reset_combine`

Long name: Lid/firn just combined (flag) · Dim: scalar · Units: 1 · Default: False

Flag indicating whether a lid/lake/firn system has reached a trigger that combines everything back into a single firn column.

`error_flag`

Long name: Cell hit an error state (flag) · Dim: scalar · Units: 1 · Default: False

MONARCHS grid variables

Fixed values

column

row

vert_grid

vert_grid_lake

vert_grid_lid

lat

lon

size_dx

size_dy

valid_cell

Firn

firn_depth

vertical_profile

firn_temperature

rho

Sfrac

Lfrac

meltflag

saturation

ice_lens

ice_lens_depth

Surface

albedo

melt

exposed_water

total_melt

Lake

lake

lake_depth

lake_temperature

Lid

lid

lid_depth

lid_temperature

v_lid

v_lid_depth

virtual_lid_temperature

has_had_lid

lid_sfc_melt

lid_snow_depth

snow_on_lid