netcdf C6_4965649_1_2315471683305181155 { dimensions: axis_nbounds = 2 ; lon = 144 ; lat = 143 ; time = UNLIMITED ; // (1980 currently) variables: float lat(lat) ; lat:axis = "Y" ; lat:standard_name = "latitude" ; lat:long_name = "Latitude" ; lat:units = "degrees_north" ; float lon(lon) ; lon:axis = "X" ; lon:standard_name = "longitude" ; lon:long_name = "Longitude" ; lon:units = "degrees_east" ; double wavelength ; wavelength:name = "wavelength" ; wavelength:standard_name = "radiation_wavelength" ; wavelength:long_name = "Radiation Wavelength 550 nanometers" ; wavelength:units = "nm" ; double time(time) ; time:axis = "T" ; time:standard_name = "time" ; time:long_name = "Time axis" ; time:calendar = "gregorian" ; time:units = "days since 1850-01-01 00:00:00" ; time:time_origin = "1850-01-01 00:00:00" ; time:bounds = "time_bounds" ; double time_bounds(time, axis_nbounds) ; float od550dust(time, lat, lon) ; od550dust:online_operation = "average" ; od550dust:cell_methods = "area: time: mean" ; od550dust:interval_operation = "900 s" ; od550dust:interval_write = "1 month" ; od550dust:_FillValue = 1.e+20f ; od550dust:missing_value = 1.e+20f ; od550dust:coordinates = "wavelength" ; od550dust:standard_name = "atmosphere_optical_thickness_due_to_dust_ambient_aerosol_particles" ; od550dust: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. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. \"Aerosol\" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. \"Ambient_aerosol\" means that the aerosol is measured or modelled at the ambient state of pressure, temperature and relative humidity that exists in its immediate environment. \"Ambient aerosol particles\" are aerosol particles that have taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the particles. The specification" ; od550dust:long_name = "dust aod@550nm" ; od550dust:history = "none" ; od550dust:units = "1" ; od550dust:cell_measures = "area: areacella" ; // global attributes: :name = "/ccc/work/cont003/gencmip6/p529vui/IGCM_OUT/IPSLCM6/PROD/hist-noLu/CM61-LR-hist-noLu-04/CMIP6/ATM/od550dust_AERmon_IPSL-CM6A-LR_hist-noLu_r1i1p1f1_gr_%start_date%-%end_date%" ; :Conventions = "CF-1.7 CMIP-6.2" ; :creation_date = "2019-02-01T20:36:51Z" ; :tracking_id = "hdl:21.14100/fb57a517-632d-4f8e-b6f9-233d5ec35b01" ; :description = "Same as CMIP6 historical but with land cover held at 1850, no human activity; concentration driven" ; :title = "IPSL-CM6A-LR model output prepared for CMIP6 / LUMIP hist-noLu" ; :activity_id = "LUMIP" ; :contact = "
" ; :data_specs_version = "01.00.28" ; :dr2xml_version = "1.16" ; :experiment_id = "hist-noLu" ; :experiment = "historical with no land-use change" ; :external_variables = "areacella" ; :forcing_index = 1 ; :frequency = "mon" ; :further_info_url = "https://furtherinfo.es-doc.org/CMIP6.IPSL.IPSL-CM6A-LR.hist-noLu.none.r1i1p1f1" ; :grid = "LMDZ grid" ; :grid_label = "gr" ; :nominal_resolution = "250 km" ; :history = "none" ; :initialization_index = 1 ; :institution_id = "IPSL" ; :institution = "Institut Pierre Simon Laplace, Paris 75252, France" ; :license = "CMIP6 model data produced by IPSL is licensed under a Creative Commons Attribution-NonCommercial-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://cmc.ipsl.fr/. 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" ; :parent_experiment_id = "piControl" ; :parent_mip_era = "CMIP6" ; :parent_activity_id = "CMIP" ; :parent_source_id = "IPSL-CM6A-LR" ; :parent_time_units = "days since 1850-01-01 00:00:00" ; :parent_variant_label = "r1i1p1f1" ; :branch_method = "standard" ; :branch_time_in_parent = 21914. ; :branch_time_in_child = 0. ; :physics_index = 1 ; :product = "model-output" ; :realization_index = 1 ; :realm = "aerosol" ; :source = "IPSL-CM6A-LR (2017): atmos: LMDZ (NPv6, N96; 144 x 143 longitude/latitude; 79 levels; top level 40000 m) land: ORCHIDEE (v2.0, Water/Carbon/Energy mode) ocean: NEMO-OPA (eORCA1.3, tripolar primarily 1deg; 362 x 332 longitude/latitude; 75 levels; top grid cell 0-2 m) ocnBgchem: NEMO-PISCES seaIce: NEMO-LIM3" ; :source_id = "IPSL-CM6A-LR" ; :source_type = "AOGCM BGC" ; :sub_experiment_id = "none" ; :sub_experiment = "none" ; :table_id = "AERmon" ; :variable_id = "od550dust" ; :variant_label = "r1i1p1f1" ; :EXPID = "hist-noLu" ; :CMIP6_CV_version = "cv=6.2.15.1" ; :dr2xml_md5sum = "c2dce418e78ca835be1e2ff817c2c403" ; :model_version = "6.1.8" ; }