PROJCS["WGS 84 / NSIDC EASE-Grid 2.0 North",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",90],PARAMETER["longitude_of_center",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",SOUTH],AXIS["Northing",SOUTH],AUTHORITY["EPSG","6931"]] -5.4000000000000000e+06, 2.5000000000000000e+04, 0.0000000000000000e+00, 5.4000000000000000e+06, 0.0000000000000000e+00, -2.5000000000000000e+04 0 0 lambert_azimuthal_equal_area 298.257223563 90 0 +proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs 6378137 Research Council of Norway (project 'TARDIS', no. 325241) and the European Space Agency (project 'CCI SAGE', no. 4000147560/25/I-LR) lagrangian_sea_ice_age_v2p1 Grid No comments Anton Korosov, anton.korosov@nersc.no leo.edel@nersc.no, laurent.bertino@nersc.no NERSC, NERSC Leo Edel, Laurent Bertino assistant, project leader CF-1.7, ACDD-1.3 anton.korosov@nersc.no Nansen Environmental and Remote Sensing Center (NERSC) Anton Korosov person https://nersc.no/en/ansatt/anton-korosov/ 10.21343/sqvr-rq75 2026-01-19T00:00:00Z POLYGON((-5387500 -5387500, 5387500 -5387500, 5387500 5387500, -5387500 5387500, -5387500 -5387500)) EPSG:6931 90 17.61 180 -180 0 0 Created on 2026-01-19T00:00:00Z by NERSC Sea Ice Age processing script Nansen Environmental and Remote Sensing Center Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager (SSM/I), Special Sensor Microwave - Imager/Sounder (SSMIS), Special Sensor Microwave - Imager/Sounder (SSMIS), Special Sensor Microwave - Imager/Sounder (SSMIS), Advanced Microwave Scanning Radiometer for EOS (AMSR-E), Advanced Microwave Scanning Radiometer - 2 (AMSR2) WMO OSCAR Space:https://space.oscar.wmo.int/instruments oceans,climatologyMeteorologyAtmosphere GCMDSK:Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, GCMDSK:Earth Science > Oceans > Sea Ice > Sea Ice Concentration, GCMDSK:Earth Science > Climate Indicators > Cryospheric Indicators > Sea Ice Concentration, GCMDSK:Earth Science > Cryosphere > Sea Ice > Sea Ice Motion, GCMDSK:Earth Science > Oceans > Sea Ice > Sea Ice Motion, GCMDSK:Earth Science > Climate Indicators > Cryospheric Indicators > Sea Ice Motion, GCMDLOC:Geographic Region > Northern Hemisphere, GCMDLOC:Vertical Location > Sea Surface, GCMDPROV: CONSORTIA/INSTITUTIONS > NERSC > Nansen Environmental and Remote Sensing Center GCMDSK:GCMD Science Keywords:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords, GCMDPROV:GCMD Providers:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/providers, GCMDLOC:GCMD Locations:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/locations CC-BY-4.0 Defense Meteorological Satellite Program - F08 (DMSP-F08), Defense Meteorological Satellite Program - F10 (DMSP-F10), Defense Meteorological Satellite Program - F11 (DMSP-F11), Defense Meteorological Satellite Program - F13 (DMSP-F13), Defense Meteorological Satellite Program - F14 (DMSP-F14), Defense Meteorological Satellite Program - F15 (DMSP-F15), Defense Meteorological Satellite Program - F16 (DMSP-F16), Defense Meteorological Satellite Program - F17 (DMSP-F17), Defense Meteorological Satellite Program - F18 (DMSP-F18), Earth Observation System - Aqua (Aqua), Global Change Observation Mission for Water  (GCOM-W) WMO OSCAR Space:https://space.oscar.wmo.int/satellites Level 4 arctic25km_sea_ice_age_v2p1 nersc_arctic_sea_ice_age_climate_data_record released 2.1.2 Thickness of Arctic sea ice Reconstructed by Data assimilation and artificial Intelligence Seamlessly (TARDIS) adc-support@met.no Norwegian Meteorological Institute https://ror.org/001n36p86 Norwegian Meteorological Institute/Arctic Data Centre (NO/MET/ADC) https://adc.met.no/ https://doi.org/10.5194/essd-2025-477 (Scientific publication:A Climate Data Record of Sea Ice Age Using Lagrangian Advection of a Triangular Mesh) Global Sea Ice Drift Climate Data Record Version 1 from the EUMETSAT OSI SAF, Sea Ice Concentration Climate Data Record Version 3 from the EUMETSAT OSI SAF 25.0 km grid spacing CF Standard Name Table (Version 78, 21 September 2021) This climate data record of sea ice age is obtained from coarse resolution ice drift and conentration OSI SAF products. The processing chain features: 1) Lagrangian advection of ice age fractions, 2) Weighted averaging of fractions. P1D 2016-05-14T00:00:00Z P1D 2016-05-13T00:00:00Z Arctic Sea Ice Age Climate Data Record v2.1 {time} {1,6} 1210680000 sea_ice_age_uncertainty status_flag The weighted average is computed over all available fractions. modelResult Lambert_Azimuthal_Equal_Area Weighted Average of Sea Ice Age sea_ice_age age_of_sea_ice years 20 0 T time_bnds standard reference time of product time seconds since 1978-01-01 00:00:00 X projection_x_coordinate m Y projection_y_coordinate m sea_ice_age_uncertainty status_flag The weighted average is computed over all available fractions. modelResult Lambert_Azimuthal_Equal_Area Weighted Average of Sea Ice Age sea_ice_age 1210680000 sea_ice_age age_of_sea_ice YES 6.109375 0.79294959851524 0 0.75635586383028 9.892 years 20 0 9.96920996838686905e+36 0 6.109375 2048 1 0 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NETCDF:"/lustre/storeB/adc-data/papers/NERSC_arctic25km_sea_ice_age_v2p1/2016/arctic25km_sea_ice_age_v2p1_20160513.nc":sea_ice_age 1 9.96920996838686905e+36