Data Announcements

NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce its participation in NASA’s Earthdata Forum. Earthdata Forum provides a central online location where data users can interact with subject-matter experts from NASA’s Distributed Active Archive Centers (DAACs) to discuss data applications and research needs and get answers to specific questions about accessing, viewing, and manipulating NASA Earth observation data.

The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 6 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 5 June 2022. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 30 March 2022. Due to the failure of Sentinel-1B on 23 December 2021, data acquired after 25 December 2021 has a temporal resolution of 12 days.

The MEaSUREs Greenland Ice Mapping Project (GrIMP) Digital Elevation Model from GeoEye and WorldView Imagery, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to Version 2.

The temporal coverage of the Daily 4 km Gridded SWE and Snow Depth from Assimilated In-Situ and Modeled Data over the Conterminous US, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been extended to include the 2021 water year.

The CryoSat-2 Level-1B Waveforms, Sea Ice Elevation, and Surface Roughness, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is being updated to complete the season through 15 May 2022. Data are currently available through 21 April 2022, and all remaining data will be released as they are processed. This data set contains surface elevations from retracked CryoSat-2 waveforms, as well as model fitting parameters used to retrack the waveform.

The Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 4 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated through 31 December 2021. This data set provides daily and weekly sea ice motion vectors including browse images of the weekly data. The source data used to generate the daily and weekly ice motion estimates are derived from AVHRR, AMSRE, SMMR, SSMI, and SSMI/S sensors; IABP buoys; and NCEP/NCAR Reanalysis forecasts.

The EASE-Grid Sea Ice Age, Version 4 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated through 31 December 2021. This data set provides weekly estimates of sea ice age for the Arctic derived from remotely sensed sea ice motion and sea ice extent. Data set DOI: https://doi.org/10.5067/UTAV7490FEPB

The ICESat-2 L4 Grounding Zone for Antarctic Ice Shelves, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The ATLAS/ICESat-2 ATL03 Ancillary Masks, Version 1 is an ancillary ICESat-2 data set that contains four static surface masks (land ice, sea ice, land, and ocean) provided to reduce the volume of data required to be processed for each surface-specific along-track data product. For example, the land ice surface mask directs the ATL06 land ice algorithm to consider data from only those areas of interest to the land ice community.

The LVIS Facility L1B Geolocated Return Energy Waveforms, Version 1 and LVIS Facility L2 Geolocated Surface Elevation and Canopy Height Product, Version 1 have been updated at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) to now include data from flights held in July and August 2021.

The Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS, Version 3 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include new data through 31 December 2021. This data set consists of daily and monthly sea ice concentrations derived from brightness temperature measurements. This data set is available for the north and south polar regions, with a temporal coverage extending back to 1 November 1978.

The MEaSUREs Annual Greenland Outlet Glacier Terminus Positions from SAR Mosaics, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. New data for glaciers in the northwest and central west Greenland have been added so the data set now spans the winter seasons 1972-1973 through 2020-2021.

Older versions of multiple ATLAS/ICESat-2 data sets will be retired on 13 June 2022. After this date, access to the data will no longer be available, but the data set documentation will remain available for future reference at the following locations:

The Application for Extracting and Exploring Analysis Ready Samples (AppEEARS) now includes the newest versions of select Soil Moisture Active Passive (SMAP) data sets from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). AppEEARS offers a simple and efficient way to subset SMAP data sets using spatial, temporal, and layer parameters for both point and area samples.

The CryoSat-2 Level-4 Sea Ice Elevation, Freeboard, and Thickness, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data through March 2022. Data will be updated on a regular basis through May with a temporal lag of approximately 1.5 months between the most recent file and the present date.

The Images of Antarctic Ice Shelves data set (NSIDC-0102), accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to Version 2. This data set contains images of ice shelves considered the most susceptible to rapid change due to climatic warming and those that occasionally calve major icebergs. This monitoring effort began using AVHRR 1 Km images and later included MODIS images from both Terra and Aqua.

NOAA@NSIDC would like to make users aware that the ice-off dates for certain years between 2006-2019 for 20 Maine Lakes in this database have been corrected. The source of these dates for 2007-2008 onwards for 19 of these lakes are the Maine Department of Agriculture, Conservation and Forestry (DACF).

The ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography (ATL19), Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to Version 2. This data set contains monthly gridded dynamic ocean topography (DOT), derived from the along-track ATLAS/ICESat-2 L3A Ocean Surface Height product (ATL12, Version 5). Both single beam and all-beam gridded averages are available in this data set.

NOAA@NSIDC would like to make users aware of a change to the processing frequency for the U.S. National Ice Center Arctic and Antarctic Sea Ice Concentration and Climatologies in Gridded Format data set. The USNIC has changed to creating their Arctic and Antarctic Sea Ice Charts from weekly to every other week. The Arctic and Antarctic charts will be processed on alternating weeks. For example, the Arctic charts were processed for the week of 18 April 2022, and the Antarctic will be processed the following week, and so on alternating each week.