Dataset
Ocean data produced by the CESM2 model for the Regional Aerosol Model Intercomparison Project (RAMIP)
Abstract
This record contains ocean data for simulations from the Regional Aerosol Model Intercomparison Project (RAMIP), produced using CESM2. It contains NetCDF output from coupled transient simulations. For a full description of the experiments, see: https://gmd.copernicus.org/articles/16/4451/2023/.
The simulations are initialised from the CMIP6 historical experiment. Anthropogenic emissions designed for the ScenarioMIP experiments SSP3-7.0 and SSP1-2.6 are used. All experiments follow SSP3-7.0, with perturbations to regional aerosol and precursor emissions using SSP1-2.6 emissions, following the RAMIP protocol. Data are provided for a subset of CMIP6 variables, following their CMIP6 definitions in native CESM2 format. Some 3D variables are produced at reduced vertical resolution compared to CMIP6. These are identified with new variable names, as set out in the RAMIP data request: https://gmd.copernicus.org/articles/16/4451/2023/
Acronyms
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CESM2: the Community Earth System Model 2 hosted at the National Centre for Atmospheric Research (NCAR) in the US.
SSP1-2.6: experiment based on Shared Socioeconomic Pathway SSP1 with low climate change mitigation and adaptation challenges and RCP2.6, a future pathway with a radiative forcing of 2.6 W/m2 in the year 2100.
SSP3-7.0: experiment based on Shared Socioeconomic Pathway SSP3 which is characterised by high challenges to both mitigation and adaptation and RCP7.0, a future pathway with a radiative forcing of 7.0 W/m2 in the year 2100.
ScenarioMIP: the Scenario Model Intercomparison Project simulates climate outcomes based on alternative plausible future scenarios.
CMIP6: is the sixth phase of the Coupled Model Intercomparison Project, a global collaboration of climate modellers.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence(s): https://artefacts.ceda.ac.uk/licences/specific_licences/RAMIP.pdf When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
The simulations are initialised from the CESM2 Large Ensemble (LE) historical experiments. The baseline SSP370 RAMIP experiment comes directly from the CESM2-LE project. In particular, CESM2 RAMIP uses 10 of the macroperturbation runs (i.e., each ensemble member is initialized from a different year in the preindustrial control simulation) that use an 11-year running mean filter to smooth the CMIP6 biomass burning emissions, including members Anthropogenic emissions designed for the ScenarioMIP experiments SSP3-7.0 and SSP1-2.6 are used. All experiments follow SSP3-7.0, with perturbations to regional aerosol and precursor emissions using SSP1-2.6 emissions, following the RAMIP protocol. Data are provided for a subset of CMIP6 variables, following their CMIP6 definitions. Some 3D variables are produced at reduced vertical resolution compared to CMIP6. These are identified with new variable names, as set out in the RAMIP data request: https://gmd.copernicus.org/articles/16/4451/2023/ |
| Data Quality: |
Quality control checks (CEDA-CC and CF compliance) were performed by the Centre for Environmental Data Analysis (CEDA) to ensure that the data meets the RAMIP and CMIP6Plus metadata requirements.
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| File Format: |
NetCDF
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Process overview
| Title | CESM2 |
| Abstract | The CESM2 climate model, released in 2018, includes the following components: For CESM2-LE, the model was run by the National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, 1850 Table Mesa Drive, Boulder, CO 80305, USA (NCAR) in native nominal resolutions: aerosol: 100 km, atmos: 100 km, atmosChem: 100 km, land: 100 km, landIce: 5 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km. For RAMIP, the model was run by the University of California Riverside at NCAR using the cheyenne supercomputer using the same native nominal resolutions. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- var_id: grav
- long_name: Acceleration Due to Gravity
- units: centimeter/s^2
- units: kg/m^3
- var_id: rho_air
- long_name: Ambient Air Density
- units: days
- var_id: days_in_norm_year
- long_name: Calendar Length
- var_id: heat_to_PW
- long_name: Convert Heat Flux to Petawatts
- var_id: hflux_factor
- long_name: Convert Heat and Solar Flux to Temperature Flux
- var_id: mass_to_Sv
- long_name: Convert Mass Flux to Sverdrups
- var_id: fwflux_factor
- long_name: Convert Net Fresh Water Flux to Salt Flux (in model units)
- var_id: sflux_factor
- long_name: Convert Salt Flux to Salt Flux (in model units)
- var_id: salt_to_Svppt
- long_name: Convert Salt Flux to Sverdrups*g/kg
- var_id: ppt_to_salt
- long_name: Convert Salt in g/kg to gram/gram
- var_id: salt_to_ppt
- long_name: Convert Salt in gram/gram to g/kg
- var_id: salt_to_mmday
- long_name: Convert Salt to Water (millimeters/day)
- var_id: momentum_factor
- long_name: Convert Windstress to Velocity Flux
- units: gram/centimeter^3
- var_id: rho_fw
- long_name: Density of Fresh Water
- var_id: rho_sw
- long_name: Density of Sea Water
- units: gram/centimeter^3
- var_id: omega
- long_name: Earths Angular Velocity
- units: 1/second
- units: centimeters
- var_id: radius
- long_name: Earths Radius
- units: centimeter/s
- var_id: FW
- long_name: Freshwater Flux
- var_id: cp_air
- long_name: Heat Capacity of Air
- units: joule/kg/degK
- units: gram/centimeter^3
- var_id: RHO
- long_name: In-Situ Density
- var_id: QFLUX
- long_name: Internal Ocean Heat Flux Due to Ice Formation; heat of fusion > 0 or ice-melting potential < 0
- units: Watts/meter^2
- var_id: latent_heat_fusion
- long_name: Latent Heat of Fusion
- units: erg/g
- units: J/kg
- var_id: latent_heat_vapor
- long_name: Latent Heat of Vaporization
- units:
- var_id: moc_components
- long_name: MOC component names
- var_id: MOC
- long_name: Meridional Overturning Circulation
- units: Sverdrups
- units: centimeter
- var_id: HMXL
- long_name: Mixed-Layer Depth
- units: centimeter
- var_id: HMXL_DR
- long_name: Mixed-Layer Depth (density)
- var_id: N_HEAT
- long_name: Northward Heat Transport
- units: Pwatt
- var_id: N_SALT
- long_name: Northward Salt Transport
- units: gram centimeter^3/kg/s
- var_id: nsurface_t
- long_name: Number of Ocean T Points at Surface
- var_id: nsurface_u
- long_name: Number of Ocean U Points at Surface
- units: g/kg
- var_id: ocn_ref_salinity
- long_name: Ocean Reference Salinity
- units: degC
- long_name: Potential Temperature
- var_id: TEMP
- var_id: sos
- long_name: SALT[:,0,:,:]
- units: gram/kilogram
- var_id: hfds
- long_name: SHF+QFLUX
- units: watt/m^2
- long_name: Salinity
- var_id: SALT
- units: gram/kilogram
- units: g/kg
- var_id: sea_ice_salinity
- long_name: Salinity of Sea Ice
- var_id: cp_sw
- long_name: Specific Heat of Sea Water
- units: erg/g/K
- var_id: sound
- long_name: Speed of Sound
- units: centimeter/s
- var_id: stefan_boltzmann
- long_name: Stefan-Boltzmann Constant
- units: watt/m^2/degK^4
- units:
- var_id: transport_components
- long_name: T,S transport components
- units: degC
- var_id: tos
- long_name: TEMP[:,0,:,:]
- units: watt/m^2
- var_id: SHF
- long_name: Total Surface Heat Flux, Including SW
- units: centimeter/s
- var_id: UVEL
- long_name: Velocity in grid-x direction
- units: centimeter/s
- var_id: VVEL
- long_name: Velocity in grid-y direction
- long_name: Vertical Velocity
- units: centimeter/s
- var_id: WVEL
- units: kg/m^2/s
- var_id: SFWF
- long_name: Virtual Salt Flux in FW Flux formulation
- units: degK
- var_id: T0_Kelvin
- long_name: Zero Point for Celsius
- units: radians
- var_id: ANGLE
- long_name: angle grid makes with latitude line
- units: radians
- long_name: angle grid makes with latitude line on T grid
- var_id: ANGLET
- var_id: TAREA
- long_name: area of T cells
- units: centimeter^2
- units: centimeter^2
- var_id: UAREA
- long_name: area of U cells
- units: degrees_north
- var_id: TLAT
- long_name: array of t-grid latitudes
- units: degrees_east
- var_id: TLONG
- long_name: array of t-grid longitudes
- units: degrees_north
- var_id: ULAT
- long_name: array of u-grid latitudes
- units: degrees_east
- var_id: ULONG
- long_name: array of u-grid longitudes
- var_id: REGION_MASK
- long_name: basin index number (signed integers)
- units: days
- long_name: boundaries for time-averaging interval
- var_id: time_bound
- units: centimeters
- var_id: HTE
- long_name: cell widths on East sides of T cell
- var_id: HTN
- units: centimeters
- long_name: cell widths on North sides of T cell
- units: centimeters
- var_id: HUS
- long_name: cell widths on South sides of U cell
- units: centimeters
- var_id: HUW
- long_name: cell widths on West sides of U cell
- units: centimeters
- var_id: z_w_bot
- long_name: depth from surface to bottom of layer
- units: centimeters
- long_name: depth from surface to midpoint of layer
- var_id: z_t_150m
- units: centimeters
- long_name: depth from surface to top of layer
- var_id: moc_z
- var_id: KMT
- long_name: k Index of Deepest Grid Cell on T Grid
- var_id: KMU
- long_name: k Index of Deepest Grid Cell on U Grid
- units: degrees_north
- var_id: lat_aux_grid
- long_name: latitude grid for transport diagnostics
- var_id: dzw
- units: centimeters
- long_name: midpoint of k to midpoint of k+1
- units: centimeter
- var_id: HT
- long_name: ocean depth at T points
- var_id: HU
- long_name: ocean depth at U points
- units: centimeter
- long_name: regions for all transport diagnostics
- units:
- var_id: transport_regions
- var_id: salinity_factor
- var_id: dz
- units: centimeters
- long_name: thickness of layer k
- long_name: time
- var_id: time
- units: days
- var_id: vonkar
- long_name: von Karman Constant
- units: centimeters
- var_id: DXT
- long_name: x-spacing centered at T points
- units: centimeters
- var_id: DXU
- long_name: x-spacing centered at U points
- units: centimeters
- var_id: DYT
- long_name: y-spacing centered at T points
- units: centimeters
- var_id: DYU
- long_name: y-spacing centered at U points
Co-ordinate Variables
Temporal Range
2015-01-01T00:00:00
2100-12-31T00:00:00
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
|
-90.0000° |