netcdf C6_4099967_1_9372679679411395761 {
dimensions:
time = UNLIMITED ; // (1980 currently)
lev = 26 ;
lat = 64 ;
lon = 128 ;
bnds = 2 ;
variables:
double time(time) ;
time:bounds = "time_bnds" ;
time:units = "days since 1850-01-01" ;
time:calendar = "365_day" ;
time:axis = "T" ;
time:long_name = "time" ;
time:standard_name = "time" ;
double time_bnds(time, bnds) ;
double lev(lev) ;
lev:bounds = "lev_bnds" ;
lev:units = "1" ;
lev:axis = "Z" ;
lev:positive = "down" ;
lev:long_name = "hybrid sigma pressure coordinate" ;
lev:standard_name = "atmosphere_hybrid_sigma_pressure_coordinate" ;
lev:formula = "p = a*p0 + b*ps" ;
lev:formula_terms = "p0: p0 a: a b: b ps: ps" ;
double lev_bnds(lev, bnds) ;
lev_bnds:formula = "p = a*p0 + b*ps" ;
lev_bnds:standard_name = "atmosphere_hybrid_sigma_pressure_coordinate" ;
lev_bnds:units = "1" ;
lev_bnds:formula_terms = "p0: p0 a: a_bnds b: b_bnds ps: ps" ;
double p0 ;
p0:long_name = "vertical coordinate formula term: reference pressure" ;
p0:units = "Pa" ;
double a(lev) ;
a:long_name = "vertical coordinate formula term: a(k)" ;
double b(lev) ;
b:long_name = "vertical coordinate formula term: b(k)" ;
float ps(time, lat, lon) ;
ps:long_name = "Surface Air Pressure" ;
ps:units = "Pa" ;
double a_bnds(lev, bnds) ;
a_bnds:long_name = "vertical coordinate formula term: a(k+1/2)" ;
double b_bnds(lev, bnds) ;
b_bnds:long_name = "vertical coordinate formula term: b(k+1/2)" ;
double lat(lat) ;
lat:bounds = "lat_bnds" ;
lat:units = "degrees_north" ;
lat:axis = "Y" ;
lat:long_name = "latitude" ;
lat:standard_name = "latitude" ;
double lat_bnds(lat, bnds) ;
double lon(lon) ;
lon:bounds = "lon_bnds" ;
lon:units = "degrees_east" ;
lon:axis = "X" ;
lon:long_name = "Longitude" ;
lon:standard_name = "longitude" ;
double lon_bnds(lon, bnds) ;
float ch4(time, lev, lat, lon) ;
ch4:standard_name = "mole_fraction_of_methane_in_air" ;
ch4:long_name = "CH4 volume mixing ratio" ;
ch4:comment = "Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y." ;
ch4:units = "mol mol-1" ;
ch4:original_name = "CH4" ;
ch4:cell_methods = "area: time: mean (interval: 20 minutes)" ;
ch4:cell_measures = "area: areacella" ;
ch4:missing_value = 1.e+20f ;
ch4:_FillValue = 1.e+20f ;
ch4:history = "2020-05-11T06:54:48Z altered by CMOR: Inverted axis: lev." ;
// global attributes:
:Conventions = "CF-1.7 CMIP-6.2" ;
:activity_id = "AerChemMIP" ;
:branch_method = "Standard" ;
:branch_time_in_child = 0. ;
:branch_time_in_parent = 2110. ;
:comment = "The experiments parallel historical from 1850 to 2014 with all forcing applied, but fix the anthropogenic emissions of Aerosol precursors to the 1850 value that is used in piControl. The same initial conditions as r1i1p1f1 of historical, branched from year 2110 in piControl." ;
:contact = "Dr. Tongwen Wu()" ;
:creation_date = "2020-05-11T06:54:48Z" ;
:data_specs_version = "01.00.27" ;
:description = "AerChemMIP:hist-piAer" ;
:experiment = "historical forcing, but with pre-industrial aerosol emissions" ;
:experiment_id = "hist-piAer" ;
:external_variables = "areacella" ;
:forcing_index = 1 ;
:frequency = "mon" ;
:further_info_url = "https://furtherinfo.es-doc.org/CMIP6.BCC.BCC-ESM1.hist-piAer.none.r1i1p1f1" ;
:grid = "T42" ;
:grid_label = "gn" ;
:history = "2020-05-11T06:54:48Z ; CMOR rewrote data to be consistent with CMIP6, CF-1.7 CMIP-6.2 and CF standards." ;
:initialization_index = 1 ;
:institution = "Beijing Climate Center, Beijing 100081, China" ;
:institution_id = "BCC" ;
:mip_era = "CMIP6" ;
:nominal_resolution = "250 km" ;
:parent_activity_id = "CMIP" ;
:parent_experiment_id = "piControl" ;
:parent_mip_era = "CMIP6" ;
:parent_source_id = "BCC-ESM1" ;
:parent_time_units = "days since 1850-01-01" ;
:parent_variant_label = "r1i1p1f1" ;
:physics_index = 1 ;
:product = "model-output" ;
:realization_index = 1 ;
:realm = "aerosol" ;
:references = "Model described by Tongwen Wu et al. (JGR 2013; JMR 2014; GMD,2019). Also see http://forecast.bcccsm.ncc-cma.net/htm" ;
:run_variant = "forcing: greenhouse gases,aerosol emission,solar constant,volcano mass,land use" ;
:source = "BCC-ESM 1 (2017): aerosol: none atmos: BCC_AGCM3_LR (T42; 128 x 64 longitude/latitude; 26 levels; top level 2.19 hPa) atmosChem: BCC-AGCM3-Chem land: BCC_AVIM2 landIce: none ocean: MOM4 (1/3 deg 10S-10N, 1/3-1 deg 10-30 N/S, and 1 deg in high latitudes; 360 x 232 longitude/latitude; 40 levels; top grid cell 0-10 m) ocnBgchem: none seaIce: SIS2" ;
:source_id = "BCC-ESM1" ;
:source_type = "AER AOGCM CHEM" ;
:sub_experiment = "none" ;
:sub_experiment_id = "none" ;
:table_id = "AERmon" ;
:table_info = "Creation Date:(30 July 2018) MD5:e53ff52009d0b97d9d867dc12b6096c7" ;
:title = "BCC-ESM1 output prepared for CMIP6" ;
:tracking_id = "hdl:21.14100/6e194fab-82de-4ddc-97cc-1b64ee0305c7" ;
:variable_id = "ch4" ;
:variant_label = "r1i1p1f1" ;
:license = "CMIP6 model data produced by BCC 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) and at https:///pcmdi.llnl.gov/. 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." ;
:cmor_version = "3.3.2" ;
}