Dataset
6-hourly data produced by the CESM2 model for the Regional Aerosol Model Intercomparison Project (RAMIP)
Abstract
This record contains 6-hourly 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
------------
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
|
|---|---|
| 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: |
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.
|
| File Format: |
NetCDF
|
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 |
- units: km
- var_id: cosp_htmisr
- long_name: COSP MISR height
- units: m
- var_id: cosp_ht
- long_name: COSP Mean Height for calipso and radar simulator outputs
- units: 1
- var_id: cosp_tau
- long_name: COSP Mean ISCCP optical depth
- units: hPa
- var_id: cosp_prs
- long_name: COSP Mean ISCCP pressure
- units: microns
- var_id: cosp_reffice
- long_name: COSP Mean MODIS effective radius (ice)
- units: microns
- var_id: cosp_reffliq
- long_name: COSP Mean MODIS effective radius (liquid)
- units: 1
- var_id: cosp_tau_modis
- long_name: COSP Mean MODIS optical depth
- units: 1
- var_id: cosp_sr
- long_name: COSP Mean Scattering Ratio for calipso simulator CFAD output
- units: dBZ
- var_id: cosp_dbze
- long_name: COSP Mean dBZe for radar simulator CFAD output
- units: degrees
- var_id: cosp_sza
- long_name: COSP Parasol SZA
- var_id: cosp_scol
- long_name: COSP subcolumn
- units: m/s
- var_id: PRECC
- long_name: Convective precipitation rate (liq + ice)
- units: m/s
- var_id: PRECL
- long_name: Large-scale (stable) precipitation rate (liq + ice)
- units: m/s
- var_id: PRECT
- long_name: Total (convective and large-scale) precipitation rate (liq + ice)
- long_name: base date (YYYYMMDD)
- var_id: nbdate
- long_name: base day
- var_id: ndbase
- long_name: ch4 volume mixing ratio
- var_id: ch4vmr
- long_name: co2 volume mixing ratio
- var_id: co2vmr
- var_id: cosp_dbze_bnds
- var_id: cosp_ht_bnds
- var_id: cosp_htmisr_bnds
- var_id: cosp_prs_bnds
- var_id: cosp_reffice_bnds
- var_id: cosp_reffliq_bnds
- var_id: cosp_sr_bnds
- var_id: cosp_tau_bnds
- var_id: cosp_tau_modis_bnds
- long_name: current date (YYYYMMDD)
- var_id: date
- long_name: current day (from base day)
- var_id: ndcur
- long_name: current seconds of current date
- var_id: datesec
- long_name: current seconds of current day
- var_id: nscur
- long_name: current timestep
- var_id: nsteph
- var_id: date_written
- long_name: f11 volume mixing ratio
- var_id: f11vmr
- long_name: f12 volume mixing ratio
- var_id: f12vmr
- long_name: hybrid A coefficient at layer interfaces
- var_id: hyai
- long_name: hybrid A coefficient at layer midpoints
- var_id: hyam
- long_name: hybrid B coefficient at layer interfaces
- var_id: hybi
- long_name: hybrid B coefficient at layer midpoints
- var_id: hybm
- units: hPa
- standard_name: atmosphere_hybrid_sigma_pressure_coordinate
- var_id: ilev
- long_name: hybrid level at interfaces (1000*(A+B))
- units: hPa
- standard_name: atmosphere_hybrid_sigma_pressure_coordinate
- var_id: lev
- long_name: hybrid level at midpoints (1000*(A+B))
- units: degrees_north
- long_name: latitude
- var_id: lat
- var_id: gw
- long_name: latitude weights
- units: degrees_east
- long_name: longitude
- var_id: lon
- long_name: n2o volume mixing ratio
- var_id: n2ovmr
- units: Pa
- long_name: reference pressure
- var_id: P0
- long_name: seconds of base date
- var_id: nbsec
- long_name: seconds of base day
- var_id: nsbase
- long_name: time
- var_id: time
- units: days
- var_id: time_bnds
- long_name: time interval endpoints
- var_id: time_written
- units: s
- long_name: timestep
- var_id: mdt
- units: W/m2
- long_name: total solar irradiance
- var_id: sol_tsi
Co-ordinate Variables
Temporal Range
2015-01-01T00:00:00
2079-12-31T00:00:00
Geographic Extent
90.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |