G10010_sibt1850_v2.0.nc ----------------------- Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, Version 2 (G10010) https://nsidc.org/data/g10010/versions/2 Observations from historical sources are the basis of this monthly gridded sea ice concentration product that begins in 1850. In 1979, these sources give way to a single source: concentration from satellite passive microwave data. The historical observations come in many forms: ship observations, compilations by naval oceanographers, analyses by national ice services, and others. Monthly sea ice concentration is given in a 1/4 degree latitude by 1/4 degree longitude grid. In addition to the concentration array, for each month a corresponding source array indicates where each of 16 possible sources is used. The file of concentration and source arrays conforms to NetCDF-4 standards. Parameter(s): SEA ICE CONCENTRATION Platform(s): DMSP, SHIPS Sensor(s): SSM/I, VISUAL OBSERVATIONS Data Format(s): NetCDF Temporal Coverage: 1 January 1850 to 31 December 2017 Temporal Resolution: 1 month Spatial Resolution: 1/4 degree 1/4 degree Spatial Coverage: N: 89.9 S: 30.1 E: 180 W: -180 NSIDC0051_SEAICE_PS_N25km_20221230_v2.0.nc NSIDC0051_SEAICE_PS_S25km_20221230_v2.0.nc NSIDC0051_SEAICE_PS_N25km_20221231_v2.0.nc NSIDC0051_SEAICE_PS_S25km_20221231_v2.0.nc -------------------------------------------------------------------------------------- Examples of daily data files (two files for each day) https://n5eil01u.ecs.nsidc.org/PM/NSIDC-0051.002/ 1978.10.26 -- 2022.12.31 https://nsidc.org/data/nsidc-0051/versions/2 Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2 (NSIDC-0051) DATA SET: NSIDC-0051 NSIDC-0051 This data set is generated from brightness temperature data and is designed to provide a consistent time series of sea ice concentrations spanning the coverage of several passive microwave instruments.The data are provided in the polar stereographic projection at a grid cell size of 25 x 25 km. Parameter(s): SEA ICE CONCENTRATION Platform(s): DMSP 5D-2/F11, DMSP 5D-2/F13, DMSP 5D-2/F8, DMSP 5D-3/F17, Nimbus-7 Sensor(s): SMMR, SSM/I, SSMIS Data Format(s): PNG, netCDF-4 Temporal Coverage: 26 October 1978 to 31 December 2022 Temporal Resolution: 1 day, 1 month Spatial Resolution: 25 km 25 km , 25 km 25 km Spatial Reference System(s): NSIDC Sea Ice Polar Stereographic North EPSG:3411 NSIDC Sea Ice Polar Stereographic South EPSG:3412 Spatial Coverage: N: -39.23 S: -90 E: 180 W: -180 N: 90 S: 30.98 E: 180 W: -180