netcdf C6_4623514_1_13713580507184374983 {
dimensions:
lat = 192 ;
nbnd = 2 ;
lon = 288 ;
time = UNLIMITED ; // (600 currently)
variables:
float od550aer(time, lat, lon) ;
od550aer:_FillValue = 1.e+20f ;
od550aer:cell_measures = "area: areacella" ;
od550aer:cell_methods = "area: time: mean" ;
od550aer:comment = "AODVISdn" ;
od550aer:coordinates = "time lat lon" ;
od550aer:description = "AOD from ambient aerosols (i.e., includes aerosol water). Does not include AOD from stratospheric aerosols if these are prescribed but includes other possible background aerosol types. Needs a comment attribute \"wavelength: 550 nm\"" ;
od550aer:frequency = "mon" ;
od550aer:id = "od550aer" ;
od550aer:long_name = "Ambient Aerosol Optical Thickness at 550nm" ;
od550aer:mipTable = "AERmon" ;
od550aer:missing_value = 1.e+20 ;
od550aer:out_name = "od550aer" ;
od550aer:prov = "AERmon ((isd.003))" ;
od550aer:realm = "aerosol" ;
od550aer:standard_name = "atmosphere_optical_thickness_due_to_ambient_aerosol_particles" ;
od550aer:time = "time" ;
od550aer:time_label = "time-mean" ;
od550aer:time_title = "Temporal mean" ;
od550aer:title = "Ambient Aerosol Optical Thickness at 550nm" ;
od550aer:type = "real" ;
od550aer:units = "1" ;
od550aer:variable_id = "od550aer" ;
double lat(lat) ;
lat:axis = "Y" ;
lat:bounds = "lat_bnds" ;
lat:standard_name = "latitude" ;
lat:title = "Latitude" ;
lat:type = "double" ;
lat:units = "degrees_north" ;
lat:valid_max = 90. ;
lat:valid_min = -90. ;
double lon(lon) ;
lon:axis = "X" ;
lon:bounds = "lon_bnds" ;
lon:standard_name = "longitude" ;
lon:title = "Longitude" ;
lon:type = "double" ;
lon:units = "degrees_east" ;
lon:valid_max = 360. ;
lon:valid_min = 0. ;
double time(time) ;
time:axis = "T" ;
time:bounds = "time_bnds" ;
time:standard_name = "time" ;
time:title = "time" ;
time:type = "double" ;
time:units = "days since 0001-01-01 00:00:00" ;
time:calendar = "365_day" ;
double time_bnds(time, nbnd) ;
time_bnds:calendar = "noleap" ;
time_bnds:units = "days since 0001-01-01 00:00:00" ;
double lat_bnds(lat, nbnd) ;
lat_bnds:units = "degrees_north" ;
double lon_bnds(lon, nbnd) ;
lon_bnds:units = "degrees_east" ;
// global attributes:
:Conventions = "CF-1.7 CMIP-6.2" ;
:activity_id = "GeoMIP" ;
:branch_method = "standard" ;
:branch_time_in_child = 0. ;
:branch_time_in_parent = 25185. ;
:case_id = "1537" ;
:cesm_casename = "b.e21.BWCO2x4.f09_g17.CMIP6-G1-WACCM.001" ;
:contact = "" ;
:creation_date = "2019-07-11T00:10:25Z" ;
:data_specs_version = "01.00.30" ;
:experiment = "Extended version of GeoMIP experiment G1 (Kravitz et al., 2011). Beginning from a preindustrial control simulation (picontrol) the net top of atmosphere (TOA) radiative flux imbalance due to an abrupt quadrupling of the CO2 concentration (abrupt4xCO2) would be balanced via a reduction in total solar irradiance. Here, \"balance\" is defined as the global mean value of top-of-atmosphere net radiative flux being within +-0.1 W/m2 of the piControl experiment over an average of years 1-10 of the simulation. The G1 experiment should be run for 50 years, however modelling groups that are not able to extend their previous (G1) model simulation should run the CMIP6 G1 experiment for the full 100 years. " ;
:experiment_id = "G1" ;
:external_variables = "areacella" ;
:forcing_index = 1LL ;
:frequency = "mon" ;
:further_info_url = "https://furtherinfo.es-doc.org/CMIP6.NCAR.CESM2-WACCM.G1.none.r1i1p1f1" ;
:grid = "native 0.9x1.25 finite volume grid (192x288 latxlon)" ;
:grid_label = "gn" ;
:initialization_index = 1LL ;
:institution = "National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, 1850 Table Mesa Drive, Boulder, CO 80305, USA" ;
:institution_id = "NCAR" ;
:license = "CMIP6 model data produced by <The National Center for Atmospheric Research> is licensed under a Creative Commons Attribution-[]ShareAlike 4.0 International License (https://creativecommons.org/licenses/). Consult https://pcmdi.llnl.gov/CMIP6/TermsOfUse for terms of use governing CMIP6 output, including citation requirements and proper acknowledgment. Further information about this data, including some limitations, can be found via the further_info_url (recorded as a global attribute in this file)[]. The data producers and data providers make no warranty, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. All liabilities arising from the supply of the information (including any liability arising in negligence) are excluded to the fullest extent permitted by law." ;
:mip_era = "CMIP6" ;
:model_doi_url = "https://doi.org/10.5065/D67H1H0V" ;
:nominal_resolution = "100 km" ;
:parent_variant_label = "r1i1p1f1" ;
:physics_index = 1LL ;
:product = "model-output" ;
:realization_index = 1LL ;
:realm = "aerosol" ;
:source = "CESM2 (2017): atmosphere: CAM6 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb); ocean: POP2 (320x384 longitude/latitude; 60 levels; top grid cell 0-10 m); sea_ice: CICE5.1 (same grid as ocean); land: CLM5 0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb); aerosol: MAM4 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb); atmoschem: MAM4 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb); landIce: CISM2.1; ocnBgchem: MARBL (320x384 longitude/latitude; 60 levels; top grid cell 0-10 m)" ;
:source_id = "CESM2-WACCM" ;
:source_type = "AOGCM BGC CHEM AER" ;
:sub_experiment = "none" ;
:sub_experiment_id = "none" ;
:table_id = "AERmon" ;
:tracking_id = "hdl:21.14100/816206c0-9c0b-469f-a291-10466746d354" ;
:variable_id = "od550aer" ;
:variant_info = "CMIP6 CESM2 G1 GeoMIP experiment with high-top atmosphere (WACCM6) with interactive chemistry (TSMLT1), interactive land (CLM5), coupled ocean (POP2) with biogeochemistry (MARBL), interactive sea ice (CICE5.1), and non-evolving land ice (CISM2.1" ;
:variant_label = "r1i1p1f1" ;
:parent_experiment_id = "piControl" ;
:parent_activity_id = "CMIP" ;
:parent_source_id = "CESM2-WACCM" ;
:parent_mip_era = "CMIP6" ;
:parent_time_units = "days since 0001-01-01 00:00:00" ;
}