News

National Snow and Ice Data Center3h
Greenland’s west coast leads the way in 2025
The left map illustrates the cumulative melt days on the Greenland Ice Sheet for the 2025 melt season through June 30. The ...
National Snow and Ice Data Center23h
SSMIS sunsets AMSR2 rises
The SSMIS data are used as input for this NSIDC-produced data set, which will therefore stop processing after 31 July 2025.
National Snow and Ice Data Center4h
New data sets release: AMSR2 Daily Polar Gridded Sea Ice Concentrations and AMSR2 Daily Polar Gridded Brightness Temperatures
These data sets provide daily files of brightness temperature data and sea ice concentrations for both the Northern and Southern Hemispheres. These data products serve as a replacement for the ...
Arctic Sea Ice3d
Circum-Arctic Map of Permafrost and Ground-Ice Conditions, Version 2 - National Snow and Ice Data Center
The Circum-Arctic permafrost and ground ice map is available via ftp in ESRI Shapefile format and Equal-Area Scalable Earth Grid (EASE-Grid) format. See the Format section for an explanation of the ...
Arctic Sea Ice3d
ATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 3
This data set (ATL03) contains height above the WGS 84 ellipsoid (ITRF2014 reference frame), latitude, longitude, and time for all photons downlinked by the Advanced Topographic Laser Altimeter System ...
Arctic Sea Ice5d
ATLAS/ICESat-2 L3A Land Ice Height, Version 6
This data set (ATL06) provides geolocated, land-ice surface heights (above the WGS 84 ellipsoid, ITRF2014 reference frame), plus ancillary parameters that can be used to interpret and assess the ...
Arctic Sea Ice8d
SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 8
SMAP Level-4 (L4) surface and root zone soil moisture (L4_SM) data are provided in three products. The SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data ...
Arctic Sea Ice5d
U.S. National Ice Center Arctic and Antarctic Sea Ice Concentration and Climatologies in Gridded Format, Version 1 - National Snow and Ice Data Center
Notice: Due to funding limitations, this data set was recently changed to a “Basic” Level of Service. Learn more about what this means for users and how you can share your story here: Level of Service ...
Arctic Sea Ice8d
SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 8 | National Snow and Ice Data Center
The Level-4 (L4) carbon product (SPL4CMDL) provides global gridded daily estimates of net ecosystem carbon (CO2) exchange derived using a satellite data based terrestrial carbon flux model informed by ...
Arctic Sea Ice4d
SMAP/CYGNSS EASE-Grid Soil Moisture, Version 1
This data set is derived by downscaling Soil Moisture Active Passive (SMAP) enhanced Level-3 9 km brightness temperatures (TB) using Cyclone Global Navigation Satellite System (CYGNSS) reflectivity ...
Arctic Sea Ice7d
ATLAS/ICESat-2 L3A Calibrated Backscatter Profiles and Atmospheric Layer Characteristics, Version 6 - National Snow and Ice Data Center
This data set (ATL09) contains calibrated, attenuated backscatter profiles, layer integrated attenuated backscatter, and other parameters including cloud layer height and atmospheric characteristics ...
Arctic Sea Ice5d
ICESat-2 and CryoSat-2 L4 Monthly Arctic Snow Depth and Sea Ice Thickness, Version 1 - National Snow and Ice Data Center
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility. Other ...