netcdf C6_4613490_1_7506516372193765133 {
dimensions:
lat = 192 ;
nbnd = 2 ;
lon = 288 ;
time = UNLIMITED ; // (384 currently)
variables:
float cod(time, lat, lon) ;
cod:_FillValue = 1.e+20f ;
cod:cell_measures = "area: areacella" ;
cod:cell_methods = "area: time: mean" ;
cod:comment = "sum(TOT_CLD_VISTAU, \"lev\")" ;
cod:coordinates = "time lat lon" ;
cod:description = "The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. \"Cloud\" means the component of extinction owing to the presence of liquid or ice water particles. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase." ;
cod:frequency = "mon" ;
cod:id = "cod" ;
cod:long_name = "Cloud Optical Depth" ;
cod:mipTable = "AERmon" ;
cod:missing_value = 1.e+20 ;
cod:out_name = "cod" ;
cod:prov = "AERmon ((isd.003))" ;
cod:realm = "aerosol" ;
cod:standard_name = "atmosphere_optical_thickness_due_to_cloud" ;
cod:time = "time" ;
cod:time_label = "time-mean" ;
cod:time_title = "Temporal mean" ;
cod:title = "Cloud Optical Depth" ;
cod:type = "real" ;
cod:units = "1" ;
cod:variable_id = "cod" ;
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 = "AerChemMIP" ;
:branch_method = "standard" ;
:branch_time_in_child = 0. ;
:branch_time_in_parent = 54385. ;
:case_id = "1641" ;
:cesm_casename = "f.e21.FWaerchem-piClim-2xVOC" ;
:contact = "" ;
:creation_date = "2019-12-05T19:11:09Z" ;
:data_specs_version = "01.00.31" ;
:experiment = "Fixed SST ERF simulation. Use pre-industrial climatological average SST and sea-ice distributions. Apply pre-industrial concentrations of WMGHG (well mixed greenhouse gases). The biogenic VOC (volatile organic compounds) emission fluxes in the interactive parameterisation are double their pre-industrial value. All other NTCF (near term climate forcers) are set to pre-industrial levels. For models that do not interactively parameterise particular emissions, the fluxes from the 1850 climatological dataset should be doubled. This is a timeslice experiment of 30 years total. The model should have the capacity for interactive tropospheric chemistry." ;
:experiment_id = "piClim-2xVOC" ;
:external_variables = "areacella" ;
:forcing_index = 1LL ;
:frequency = "mon" ;
:further_info_url = "https://furtherinfo.es-doc.org/CMIP6.NCAR.CESM2-WACCM.piClim-2xVOC.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_activity_id = "CMIP" ;
:parent_experiment_id = "piControl" ;
:parent_mip_era = "CMIP6" ;
:parent_source_id = "CESM2-WACCM" ;
:parent_time_units = "days since 0001-01-01 00:00:00" ;
: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 = "AGCM BGC CHEM AER" ;
:sub_experiment = "none" ;
:sub_experiment_id = "none" ;
:table_id = "AERmon" ;
:tracking_id = "hdl:21.14100/2105acd2-2e8b-4a74-94c4-1bab4826c84a" ;
:variable_id = "cod" ;
:variant_info = "WACCM6 AerChemMIP experiment 2xVOC" ;
:variant_label = "r1i1p1f1" ;
}