Dataset
Thermospheric cooling under RCP8.5 due to carbon dioxide increases only, select years from 1975-2095.
Abstract
This dataset contains WACCM-X model results under RCP8.5 (Representative Concentration Pathway) carbon dioxide increases and low solar activity. These cover ground level to a pressure level of 4e-10 hPa (~300 km altitude) on a global 144x96 longitude-latitude grid .
Data is given in daily instantaneous files in the netCDF format. Default WACCM-X outputs remain, along with the following additional variables:
'PS' - Surface Pressure
'Z3' - Geopotential Height (above sea level)
'T' - Temperature
'U' - Zonal Wind
'V' - Meridional Wind
'CO2' - Carbon Dioxide Concentration
'CO' - Carbon Monoxide Concentration
'NO' - Nitric Oxide Concentration
'H2O' - Water Vapour Concentration
'O' - Atomic Oxygen Concentration
More detail on each variable is given within the netCDF files and the readme file.
16 month runs from edited initial files at 10 year intervals from 2005 to 2095 under RCP8.5. There is also a 16 month 1975 run and 64 month 2000 run. All of these cyclically repeat the initial year. These are separated into individual folders with the RCP8.5 CO2 concentration listed. The first 4 months of each of these datasets have been ignored in processing as the model spins up, but are included here for completeness.
This data was collected to understand the density drop at low earth orbit altitudes as carbon dioxide concentrations increase.
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: |
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: |
Input data other than default is obtained from the subversion input data repository at https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/ These files changed in user_nl_cam include srf_emis_specifier = 'CH2O -> /.../inputdata/atm/cam/chem/2000-2100_RCP45/IPCC_emissions_houw_CH2O_2000-2100_1.9x2.5.nc', aero_file = 'aero_rcp45_v1_1.9x2.5_L26_1995-2105_c100316.nc' solar_data_file = '/.../inputdata/atm/cam/solar/spectral_irradiance_Lean_1950-2100_daily_CCMI_Leap_c150727.nc' 1975 run used all default input files. Initial conditions are those of the default year 2000 run, with CO2 and CO concentrations in the initial files edited as described within the paper (Brown et al, 2020). The files uploaded here at CEDA are the raw files output by WACCM-X with no editing. |
| File Format: |
Data are netCDF formatted.
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Related Documents
Process overview
| Title | WACCM-X as part of CESM v1.2.2 |
| Abstract | |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- long_name: 10.7 cm solar radio flux (F10.7)
- units: 10^-22 W m^-2 Hz^-1
- var_id: f107
- long_name: 81-day centered mean of 10.7 cm solar radio flux (F10.7)
- var_id: f107a
- var_id: CO
- long_name: CO concentration
- units: mol/mol
- var_id: CO2
- units: mol/mol
- long_name: CO2 concentration
- var_id: ap
- long_name: Daily planetary A geomagnetic index
- long_name: Daily planetary K geomagnetic index
- var_id: kp
- units: m
- long_name: Geopotential Height (above sea level)
- var_id: Z3
- units: m/s
- long_name: Meridional wind
- var_id: V
- var_id: NO
- units: mol/mol
- long_name: NO concentration
- units: mol/mol
- long_name: O concentration
- var_id: O
- units: Pa
- long_name: Surface pressure
- var_id: PS
- units: K
- long_name: Temperature
- var_id: T
- units: m/s
- long_name: Zonal wind
- var_id: U
- 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
- 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
- long_name: cutoff Fourier wavenumber
- var_id: wnummax
- var_id: date_written
- long_name: f11 volume mixing ratio
- var_id: f11vmr
- long_name: f12 volume mixing ratio
- var_id: f12vmr
- long_name: gauss weights
- var_id: gw
- 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: level
- standard_name: atmosphere_hybrid_sigma_pressure_coordinate
- var_id: ilev
- long_name: hybrid level at interfaces (1000*(A+B))
- units: level
- 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
- units: degrees_east
- long_name: longitude
- var_id: lon
- long_name: n2o volume mixing ratio
- var_id: n2ovmr
- var_id: nlon
- long_name: number of longitudes
- 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: spectral truncation parameter K
- var_id: ntrk
- long_name: spectral truncation parameter M
- var_id: ntrm
- long_name: spectral truncation parameter N
- var_id: ntrn
- units: degrees_north
- long_name: staggered latitude
- var_id: slat
- long_name: staggered latitude weights
- var_id: w_stag
- units: degrees_east
- long_name: staggered longitude
- var_id: slon
- long_name: time
- var_id: time
- 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
- var_id: H2O
- units: mol/mol
- long_name: water vapor concentration
Co-ordinate Variables
Temporal Range
1975-01-01T00:00:00
2095-12-31T00:00:00
Geographic Extent
90.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |