PROJCS["WGS 84 / NSIDC EASE-Grid 2.0 South",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",NORTH],AXIS["Northing",NORTH],AUTHORITY["EPSG","6932"]] -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 6378137 ACDD-1.3, CF-1.8 mabo@norceresearch.no, rori@norceresearch.no NORCE Norwegian Research Centre AS, NORCE Norwegian Research Centre AS Marion Bocquet, Robert Ricker person, person 2026-07-08T08:58:48Z -16.62393 -90 degrees_north 180 -180 degrees_east EPSG:6932 (EASE2) Thu Jul 9 10:45:36 2026: ncatted -O -a time_coverage_start,global,o,c,2020-08-21T00:00:00Z -a time_coverage_end,global,o,c,2020-08-21T23:59:59Z ./2020/08/SOSIMBA_MMS-L3-SISNOWDEPTH-ATLAS_ICESAT2_SIRAL_CRYOSAT2_SRAL_SENTINEL3A_SRAL_SENTINEL3B-SH_25KM_EASE2-20200821-fv100.nc original version SIRAL, SRAL, SRAL, ATLAS WMO OSCAR Space:https://space.oscar.wmo.int/instruments GCMDSK:Earth Science > Cryosphere > Sea Ice > Snow Depth, GCMDSK:Earth Science > Oceans > Sea Ice > Snow Depth, GCMDLOC:Geographic Region > Ocean > Southern Ocean, GCMDPROV:Academic > NORCE GCMDSK:GCMD Science Keywords:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords,GCMDLOC:GCMD Locations:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/locations,GCMDPROV: Data Center/Service Provider: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/providers http://spdx.org/licenses/CC-BY-4.0 (CC-BY-4.0) netCDF Operators version 5.0.6 (Homepage = http://nco.sf.net, Code = http://github.com/nco/nco) CryoSat-2, Sentinel-3A, Sentinel-3B, ICESat-2 WMO OSCAR Space:https://space.oscar.wmo.int/satellites L3C Southern Ocean Sea Ice Mass Balance Assessment (SO-SIMBA) adc-support@met.no Norwegian Meteorological Institute Norwegian Meteorological Institute / Arctic Data Centre (NO/MET/ADC) institution https://adc.met.no 25 km The MMS snow depth product, updated monthly, combines data from radar and laser altimetry (CryoSat-2, Sentinel-3, and ICESat-2) and snow depth derived from passive microwave. Snow depth from altimeters is derived by subtracting sea ice freeboard from snow freeboard. A drift-aware module ensures alignment of data across sensors (Ricker et al., 2025). Gridded snow depth is produced by merging and differencing these measurements, using established methods (Kacimi & Kwok, 2020). The MMS snow volume is calculated from the MMS snow depth and sea ice concentrations (SIC) from AMSR-E and AMSR2 using the ASI algorithm (Spreen et al., 2008, https://doi.org/10.1029/2005JC003384). From SIC the area covered by sea ice is calculated for every grid cell and multiplied by the snow depth to obtain sea ice volume per grid cell. The creation of this dataset was funded by ESA Polar Science Cluster project SO-SIMBA. 2020-08-21T23:59:59Z 2020-08-21T00:00:00Z SO-SIMBA climate data record of snow depth on sea ice from altimeters {time} {1,4} 1598011200 time latitude longitude auxiliaryInformation crs temporal standard deviation of total freeboard calculated over a 3-day moving window m nan time_bnds standard coordinate time time seconds since 1970-01-01 coordinate x coordinate of projection (eastings) projection_x_coordinate m coordinate y coordinate of projection (northings) projection_y_coordinate m PIXEL_CENTER 0 1 0 1 GEOGCRS["unknown",DATUM["unnamed",ELLIPSOID["Spheroid",6378137,298.257223563,LENGTHUNIT["metre",1,ID["EPSG",9001]]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9122]]],CS[ellipsoidal,2],AXIS["longitude",east,ORDER[1],ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9122]]],AXIS["latitude",north,ORDER[2],ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9122]]]] 1 NETCDF:"/lustre/storeB/adc-data/SO-SIMBA/SOSIMBA_MMS_SD_vf/2020/08/SOSIMBA_MMS-L3-SISNOWDEPTH-ATLAS_ICESAT2_SIRAL_CRYOSAT2_SRAL_SENTINEL3A_SRAL_SENTINEL3B-SH_25KM_EASE2-20200821-fv100.nc":longitude 1 NETCDF:"/lustre/storeB/adc-data/SO-SIMBA/SOSIMBA_MMS_SD_vf/2020/08/SOSIMBA_MMS-L3-SISNOWDEPTH-ATLAS_ICESAT2_SIRAL_CRYOSAT2_SRAL_SENTINEL3A_SRAL_SENTINEL3B-SH_25KM_EASE2-20200821-fv100.nc":latitude time latitude longitude auxiliaryInformation crs temporal standard deviation of total freeboard calculated over a 3-day moving window 1598011200 rolling_std_total_freeboard m nan nan NETCDF:"/lustre/storeB/adc-data/SO-SIMBA/SOSIMBA_MMS_SD_vf/2020/08/SOSIMBA_MMS-L3-SISNOWDEPTH-ATLAS_ICESAT2_SIRAL_CRYOSAT2_SRAL_SENTINEL3A_SRAL_SENTINEL3B-SH_25KM_EASE2-20200821-fv100.nc":rolling_std_total_freeboard 1 nan