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Dataset

 

FAMOUS-Glimmer simulations with interactive North American and Greenland ice sheets (21ka and 140ka)

Update Frequency: Not Planned
Latest Data Update: 2024-07-01
Status: Pending
Online Status: ONLINE
Publication State: Citable
Publication Date: 2024-07-18
DOI Publication Date: 2024-07-18
Download Stats: last 12 months
Dataset Size: 550 Files | 129GB
Abstract

This dataset contains model inputs and outputs from ensembles of simulations and sensitivity tests performed by FAMOUS-Glimmer of the Last Glacial Maximum (LGM; 21 kilo annum before present (ka BP)) and the Penultimate Glacial Maximum (PGM; 140 ka BP), as used in the publication Patterson et al., 2024 (https://doi.org/10.5194/cp-2024-10). These data were used to help understand the difference between the North American Ice Sheet at the last two glacial maxima, explore the sensitivity of the ice sheet to uncertain model parameters and understand the role of orbit, greenhouse gases and initial conditions on the final ice sheet configurations. The output of 62 ensemble members varying climate and ice sheet model parameters for each of the LGM and PGM are included as well as the results of 8 sensitivity tests using one set of parameters but varying the initial ice sheets and climates. These simulations were created using the atmospheric general circulation model FAMOUS coupled to the Glimmer ice sheet model under LGM and PGM climate boundary conditions, including greenhouse gas concentrations and orbital parameters outlined in the PMIP4 protocols (Kageyama et al., 2017 and Menviel et al., 2019).

The model inputs include ancillary files of the prescribed sea surface temperature and sea ice fields and climate model boundary conditions, netCDF files of the ice sheet model initial condition as well as the model configuration file and updated model modifications. The outputs consist of netCDF files of monthly climate model variables from ‘Not Ruled Out Yet’ ensemble simulations, ice sheet model output from the final timestep of all ensemble simulations (including ice sheet thickness, topography, surface mass balance and velocity) and final ice sheet thickness from the sensitivity tests. Also included are excel spreadsheets of the time series of total ice volumes for all ensemble members and the list of parameter combinations used for each. The climate model data has global coverage on a 7.5x5 degree lat/lon grid. The ice sheet model data covers North America and Greenland on a Lambert Azimuthal Equal Area projection at 40x40km resolution. Each simulation was run for ~1000 climate model years, with the ice sheet model running at 10x acceleration, giving ~10,000 years of ice sheet model output.

Citable as:  Patterson, V.; Gregoire, L.; Ivanovic, R.; Gandy, N.; Owen, J.; Smith, R.; Pollard, O.; Astfalck, L.; Valdes, P. (2024): FAMOUS-Glimmer simulations with interactive North American and Greenland ice sheets (21ka and 140ka). NERC EDS Centre for Environmental Data Analysis, 18 July 2024. doi:10.5285/5e48b31e413b480792e4156191b654f4. https://dx.doi.org/10.5285/5e48b31e413b480792e4156191b654f4
Abbreviation: Not defined
Keywords: Last Glacial Maximum, Penultimate Glacial Maximum, Ensemble, Uncertainty Quantification, FAMOUS-Ice, Glimmer

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence(s):
http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were generated using the FAMOUS atmosphere model coupled to the Glimmer ice sheet model. The Glimmer model output data every 10 years over the 10000 ice sheet year simulations in a netCDF file and the final timestep of the 4 variables (thickness, topography, velocity and surface mass balance) was extracted. FAMOUS output a data field every month over the 1000 climate year simulations which were converted to netCDF format and concatenated into timeseries data. The data were then archived at CEDA.
File Format:
net-CDF

Related Documents

 Contrasting the Penultimate and Last Glacial Maxima (140 and 21 ka BP) using coupled climate-ice sheet modelling, Patterson et al., 2024 (https://doi.org/10.5194/cp-2024-10)
 The PMIP4 contribution to CMIP6 – Part 4: Scientific objectives and experimental design of the PMIP4-CMIP6 Last Glacial Maximum experiments and PMIP4 sensitivity experiments, Kageyama et al., 2017.
 The penultimate deglaciation: protocol for Paleoclimate Modelling Intercomparison Project (PMIP) phase 4 transient numerical simulations between 140 and 127 ka, version 1.0, Menviel et al., 2019.

Process overview

This dataset was generated by the computation detailed below.
Title

FAMOUS-ice-Glimmer model
Abstract

Glimmer is a dynamical ice sheet model coupled to an atmosphere general circulation model of low resolution (FAMOUS-ice AGCM (FAst Met Office/UK Universities Simulator)), based on version 4.5 of the UK MetOffice Unified Model.
Input Description

None
Output Description

None
Software Reference

None
  • units: s-1
  • long_name: ACCUMULATED LEAF TURNOVER RATE PFTS
  • var_id: field1500_25
  • units: m
  • long_name: BOUNDARY LAYER DEPTH AFTER TIMESTEP
  • var_id: blht
  • standard_name: atmosphere_boundary_layer_thickness
  • units: m
  • var_id: blht_1
  • long_name: Boundary layer height
  • units:
  • var_id: field1505_18
  • long_name: CANOPY CAPACITY NON-ICE TILES KG/M2
  • long_name: CANOPY CONDUCTANCE AFTER TIMESTEP
  • var_id: field1384
  • units:
  • units: m
  • long_name: CANOPY HEIGHT OF PLANT FUNC TYPES M
  • standard_name: canopy_height
  • var_id: field1393_16
  • units: kg m-2
  • var_id: field1504_17
  • long_name: CANOPY WATER ON NON-ICE TILES KG/M2
  • var_id: field1381
  • units:
  • long_name: CLAPP-HORNBERGER "B" COEFFICIENT
  • units: W m-2
  • long_name: CLEAR-SKY (II) DOWN SURFACE SW FLUX
  • standard_name: surface_downwelling_shortwave_flux_in_air_assumingrsdscs
  • var_id: clrskyDownSol_mm_s3_srf
  • units: W m-2
  • long_name: CLEAR-SKY (II) UPWARD LW FLUX (TOA)
  • var_id: csolr_mm_s3_TOA
  • long_name: CONV CLOUD AMOUNT AFTER TIMESTEP
  • standard_name: convective_cloud_area_fraction
  • var_id: convcld
  • units:
  • long_name: CONV CLOUD BASE LEVEL NO. AFTER TS
  • units:
  • var_id: convcldbase
  • units: kg m-2
  • long_name: CONV CLOUD LIQUID WATER PATH
  • var_id: field219
  • long_name: CONV CLOUD TOP LEVEL NO. AFTER TS
  • units:
  • var_id: convcldtop
  • standard_name: projection_x_coordinate
  • units: meter
  • var_id: x1
  • long_name: Cartesian x-coordinate
  • standard_name: projection_x_coordinate
  • units: meter
  • var_id: x0
  • long_name: Cartesian x-coordinate, velocity grid
  • standard_name: projection_y_coordinate
  • units: meter
  • var_id: y1
  • long_name: Cartesian y-coordinate
  • standard_name: projection_y_coordinate
  • units: meter
  • var_id: y0
  • long_name: Cartesian y-coordinate, velocity grid
  • units:
  • var_id: field328
  • standard_name: surface_albedo_assuming_deep_snow
  • long_name: DEEP SNOW SURFACE ALBEDO AFTER TS
  • units: K
  • long_name: DEEP SOIL TEMP AFTER TIMESTEP
  • var_id: soiltemp
  • standard_name: soil_temperature
  • long_name: FRACTIONS OF SURFACE TYPES
  • units:
  • var_id: field1391_49
  • long_name: FROZEN SOIL MOISTURE FRAC AFTER TS
  • standard_name: mass_fraction_of_frozen_water_in_soil_moisture
  • var_id: field1386
  • units:
  • units: m
  • var_id: field175
  • long_name: HALF OF (PEAK TO TROUGH HT OF OROG)
  • units: level
  • var_id: hybrid_p_x1000
  • standard_name: atmosphere_hybrid_sigma_pressure_coordinate
  • long_name: Hybrid pressure multiplied by 1000
  • units: 0-1
  • var_id: iceconc_1
  • long_name: ICE EDGE IN THE ANCILLARY FILE ONLY
  • units: W m-2
  • long_name: INCOMING SW RAD FLUX (TOA): ALL TSS
  • standard_name: toa_incoming_shortwave_flux
  • var_id: downSol_mm_TOA
  • units: kg m-2
  • var_id: smb_mm_tiles
  • long_name: Ice Sheet Surface Mass Balance
  • long_name: LAND MASK (LOGICAL: LAND=TRUE)
  • var_id: lsm
  • standard_name: land_binary_mask
  • units:
  • long_name: LEAF AREA INDEX OF PLANT FUNC TYPES
  • standard_name: leaf_area_index
  • units:
  • var_id: field1392_11
  • units: level
  • var_id: ll_hy
  • long_name: Lower level (hybrid)
  • units: W m-2
  • var_id: field259
  • long_name: NET ENERGY CHANGE THIS PERIOD J/M**2
  • units: level
  • var_id: level6
  • long_name: Non-dimensional soil model level
  • long_name: OROGRAPHIC GRADIENT XX COMPONENT
  • var_id: field152
  • units:
  • long_name: OROGRAPHIC GRADIENT XY COMPONENT
  • var_id: field153
  • units:
  • long_name: OROGRAPHIC GRADIENT YY COMPONENT
  • var_id: field154
  • units:
  • units: m
  • var_id: ht
  • long_name: OROGRAPHY (/STRAT LOWER BC)
  • standard_name: surface_altitude
  • units: W m-2
  • long_name: OUTGOING LW RAD FLUX (TOA)
  • var_id: olr_mm_s3_TOA
  • units: W m-2
  • long_name: OUTGOING SW RAD FLUX (TOA)
  • standard_name: toa_outgoing_shortwave_flux
  • var_id: upSol_mm_s3_TOA
  • units: kg kg-1
  • var_id: O3
  • standard_name: mass_fraction_of_ozone_in_air
  • long_name: OZONE **
  • units: Pa
  • var_id: p
  • long_name: PSTAR AFTER TIMESTEP
  • standard_name: surface_air_pressure
  • units: kg kg-1
  • var_id: q
  • long_name: QT IN THE EXTERNAL DUMP
  • units: m
  • long_name: ROUGHNESS LENGTH AFTER TIMESTEP
  • var_id: field324
  • standard_name: surface_roughness_length
  • units: m
  • var_id: field1511_9
  • long_name: ROUGHNESS LENGTH ON TILES M
  • units: kg m-2 s-1
  • long_name: SAT SOIL CONDUCTIVITY AFTER TIMESTEP
  • standard_name: soil_hydraulic_conductivity_at_saturation
  • var_id: field333
  • units: m
  • standard_name: soil_suction_at_saturation
  • var_id: field342
  • long_name: SATURATED SOIL WATER SUCTION **
  • units: m
  • standard_name: sea_ice_thickness
  • long_name: SEA ICE DEPTH (MEAN OVER ICE) M
  • var_id: field92
  • units: 0-1
  • long_name: SEA ICE FRACTION AFTER TIMESTEP
  • var_id: iceconc
  • standard_name: sea_ice_area_fraction
  • units: K
  • long_name: SEA-ICE TEMPERATURE AFTER TIMESTEP
  • var_id: field209
  • standard_name: sea_ice_temperature
  • long_name: SILHOUETTE OROGRAPHIC ROUGHNESS
  • var_id: field174
  • units:
  • units: kg m-2
  • var_id: snowdepth
  • standard_name: snowfall_amount
  • long_name: SNOW AMOUNT AFTER TIMESTEP KG/M2
  • units:
  • var_id: field1507_9
  • standard_name: snow_grain_size
  • long_name: SNOW GRAIN SIZE MICRONS
  • units: kg m-2
  • standard_name: surface_snow_amount
  • var_id: snowdepth_mm_srf
  • long_name: SNOW MASS AFTER HYDROLOGY KG/M2
  • units:
  • var_id: field1396
  • long_name: SNOW SOOT CONTENT
  • units: K
  • var_id: temp_1
  • standard_name: temperature_in_surface_snow
  • long_name: SNOW TEMPERATURE K
  • long_name: SNOW-FREE ALBEDO OF SOIL
  • standard_name: soil_albedo
  • var_id: field1395
  • units:
  • var_id: field322
  • units:
  • standard_name: surface_albedo_assuming_no_snow
  • long_name: SNOW-FREE SURFACE ALBEDO AFTER TS
  • standard_name: soil_carbon_content
  • var_id: field1397
  • units:
  • long_name: SOIL CARBON CONTENT KG C / M2
  • units: kg m-2
  • long_name: SOIL MOISTURE CONTENT IN A LAYER
  • var_id: sm
  • standard_name: moisture_content_of_soil_layer
  • units: kg kg-1
  • long_name: SPECIFIC HUMIDITY AFTER TIMESTEP
  • standard_name: specific_humidity
  • var_id: q_mm_hyb
  • units: m
  • long_name: STANDARD DEVIATION OF OROGRAPHY
  • var_id: field150
  • units: W m-2
  • standard_name: none
  • var_id: sh_mm_hyb
  • long_name: SURFACE & B.LAYER HEAT FLUXES W/M2
  • units: W m-2
  • standard_name: surface_upward_latent_heat_flux
  • var_id: lh_mm_srf
  • long_name: SURFACE LATENT HEAT FLUX W/M2
  • units: cm s-1
  • long_name: SURFACE MERID CURRENT AFTER TIMESTEP
  • var_id: vcurr
  • standard_name: surface_northward_sea_water_velocity
  • units: K
  • var_id: temp_15
  • long_name: SURFACE TEMP ON SNOW-ADJSTD TILES K
  • units: K
  • var_id: temp
  • long_name: SURFACE TEMPERATURE AFTER TIMESTEP
  • standard_name: surface_temperature
  • units: cm s-1
  • long_name: SURFACE ZONAL CURRENT AFTER TIMESTEP
  • var_id: ucurr
  • standard_name: surface_eastward_sea_water_velocity
  • units:
  • var_id: temp_41
  • long_name: Stash code = 235
  • units:
  • var_id: temp_59
  • long_name: Stash code = 236
  • units: K
  • var_id: soiltemp_1
  • long_name: Stash code = 243
  • units: kg m-2 s-1
  • var_id: field1564_mm_srf
  • long_name: Stash code = 3331
  • standard_name: none
  • units:
  • var_id: fracPFTs_mm_srf
  • long_name: Stash code = 3417
  • units:
  • var_id: unspecified_16
  • long_name: Stash code = 376
  • units:
  • var_id: unspecified_22
  • long_name: Stash code = 377
  • units:
  • var_id: unspecified_59
  • long_name: Stash code = 378
  • units:
  • var_id: unspecified_72
  • long_name: Stash code = 379
  • units:
  • var_id: unspecified_89
  • long_name: Stash code = 380
  • units:
  • var_id: unspecified_213
  • long_name: Stash code = 381
  • units:
  • var_id: unspecified_420
  • long_name: Stash code = 382
  • units:
  • var_id: unspecified_508
  • long_name: Stash code = 383
  • units:
  • var_id: unspecified_837
  • long_name: Stash code = 384
  • units:
  • var_id: unspecified_1093
  • long_name: Stash code = 385
  • units:
  • var_id: unspecified_1273
  • long_name: Stash code = 386
  • units:
  • var_id: field1415
  • long_name: Stash code = 411
  • units:
  • var_id: field1412
  • long_name: Stash code = 413
  • units:
  • var_id: temp_73
  • long_name: Stash code = 435
  • units:
  • var_id: lsm_1
  • long_name: Stash code = 505
  • units: K
  • var_id: temp_82
  • long_name: Stash code = 506
  • units: K
  • var_id: temp_83
  • long_name: Stash code = 507
  • units: K
  • var_id: temp_84
  • long_name: Stash code = 508
  • var_id: field322_1
  • units:
  • long_name: Stash code = 509
  • units:
  • var_id: field322_2
  • long_name: Stash code = 510
  • units:
  • var_id: temp_mm_srf_2
  • long_name: Stash code = 8237
  • units: kg m-2
  • var_id: snowdepth_1
  • long_name: Stash code = 95
  • units: level
  • var_id: surface
  • long_name: Surface
  • units: K
  • standard_name: air_temperature
  • long_name: TEMPERATURE AT 1.5M
  • var_id: temp_mm_1_5m
  • units: J m-3 K-1
  • long_name: THERMAL CAPACITY AFTER TIMESTEP
  • standard_name: soil_thermal_capacity
  • var_id: field335
  • units: J m-1 K-1 s-1
  • long_name: THERMAL CONDUCTIVITY AFTER TIMESTEP
  • standard_name: soil_thermal_conductivity
  • var_id: field336
  • units: K
  • var_id: theta
  • long_name: THETAL IN THE EXTERNAL DUMP
  • units: kg m-2 s-1
  • long_name: TOTAL RAINFALL RATE: LS+CONV KG/M2/S
  • var_id: rain_mm_srf
  • units: kg m-2 s-1
  • long_name: TOTAL SNOWFALL RATE: LS+CONV KG/M2/S
  • standard_name: snowfall_flux
  • var_id: snow_mm_srf
  • units: m s-1
  • standard_name: eastward_wind
  • long_name: U COMPNT OF WIND AFTER TIMESTEP
  • var_id: u
  • units: m s-1
  • standard_name: eastward_wind
  • long_name: U COMPNT OF WIND ON PRESSURE LEVELS
  • var_id: u_mm_p
  • long_name: UNFROZEN SOIL MOISTURE FRAC AFTER TS
  • standard_name: mass_fraction_of_unfrozen_water_in_soil_moisture
  • var_id: field1385
  • units:
  • var_id: unspecified
  • long_name: Unspecified
  • units:
  • units: level
  • var_id: ul_hy
  • long_name: Upper level (hybrid)
  • units: m s-1
  • standard_name: northward_wind
  • long_name: V COMPNT OF WIND AFTER TIMESTEP
  • var_id: v
  • units: m s-1
  • standard_name: northward_wind
  • long_name: V COMPNT OF WIND ON PRESSURE LEVELS
  • var_id: v_mm_p
  • long_name: VOL SMC AT CRIT PT AFTER TIMESTEP
  • standard_name: volume_fraction_of_condensed_water_in_soil_at_critical_point
  • var_id: field330
  • units:
  • units:
  • var_id: field331
  • standard_name: volume_fraction_of_condensed_water_in_soil_at_field_capacity
  • long_name: VOL SMC AT FIELD CAP AFTER TIMESTEP
  • long_name: VOL SMC AT SATURATION AFTER TIMESTEP
  • standard_name: soil_porosity
  • var_id: field332
  • units:
  • long_name: VOL SMC AT WILTING AFTER TIMESTEP
  • standard_name: volume_fraction_of_condensed_water_in_soil_at_wilting_point
  • var_id: field329
  • units:
  • var_id: acab
  • standard_name: land_ice_surface_specific_mass_balance
  • long_name: accumulation, ablation rate
  • units: meter/year
  • units: meter
  • var_id: topg
  • standard_name: bedrock_altitude
  • long_name: bedrock topography
  • units: m
  • var_id: ht
  • units: level
  • var_id: hybrid_p_x1000
  • units: level
  • var_id: hybrid_p_x1000_1
  • units: meter
  • var_id: thk
  • standard_name: land_ice_thickness
  • long_name: ice thickness
  • var_id: uvel
  • units: meter/year
  • standard_name: land_ice_x_velocity
  • long_name: ice velocity in x direction
  • var_id: vvel
  • units: meter/year
  • standard_name: land_ice_y_velocity
  • long_name: ice velocity in y direction
  • units: degrees_north
  • var_id: latitude_1
  • var_id: level
  • units: level
  • var_id: level6
  • units: degrees_east
  • var_id: longitude_1
  • var_id: mapping
  • var_id: mask
  • units: mbar
  • var_id: p
  • units: level
  • var_id: pseudo
  • long_name: pseudo
  • units: 1
  • var_id: level
  • long_name: sigma layers
  • var_id: soft
  • units: level
  • var_id: surface
  • var_id: t
  • units: days
  • long_name: t
  • var_id: thk
  • units: level
  • var_id: toa
  • var_id: topg
  • var_id: x0
  • var_id: x1
  • var_id: y0
  • var_id: y1

Co-ordinate Variables

  • standard_name: time
  • var_id: time
  • units: year
  • long_name: Model time
  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • var_id: latitude_1
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • var_id: longitude_2
  • standard_name: time
  • var_id: t
  • units: days
Coverage
Temporal Range
Start time:
0001-01-01T00:00:00
End time:
9999-12-31T00:00:00
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (9)
Publishers (1)
Funders (1)