NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will add 18 data sets from the LVIS collection to NASA Earthdata Cloud on 11 February 2025. Earthdata Cloud is NASA’s archive of Earth observations, hosted in Amazon Web Services (AWS). While these data sets will continue to be available via their current URLs and workflows, these legacy access methods will be retired soon.

One file, SNEX23_Lidar_Raw_CPCRW_SWATH01_20230311.laz,  from the SnowEx23 Airborne Lidar Scans Raw. Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been replaced due to a recently discovered error.  The erroneous file has been removed and replaced with a corrected file.

Data set DOI: https://doi.org/10.5067/LCWGONIUOEER 

The Antarctic files from the ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height, Version 4 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been temporarily removed due to a discovered error. The Arctic region files are unaffected. The Antarctic files will be reposted as soon as they are corrected.

Data set DOI: https://doi.org/10.5067/ATLAS/ATL14.004

The distribution of ATLAS/ICESat-2 expedited latency “Quick Look” data sets for ATL07 and ATL10, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is delayed beyond the nominal 3-day latency.  NSIDC and the data providers are investigating the issue and actively working on resuming timely delivery. We apologize for any inconvenience.

ATLAS/ICESat-2 L3A Sea Ice Height Quick Look (ATL07QL)
Data set DOI: https://doi.org/10.5067/ATLAS/ATL07QL.006

The SnowEx23 Oct22 Ground Surface Roughness Reconstruction, Version 1 and SnowEx23 Oct22 Ground Surface Roughness Imagery, Version 1 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets contain ground surface roughness data and the corresponding imagery collected during the NASA SnowEx 2023 field campaign between 23 and 25 October 2022.

The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been experiencing a data outage. This outage is due to the backlog of data now processing from the most recent SMAP outage.

SMAP data processing, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has resumed operations.

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will add 12 data sets from the Aquarius collection to NASA Earthdata Cloud on 28 January 2025. Earthdata Cloud is NASA’s archive of Earth observations, hosted in Amazon Web Services (AWS). The Earthdata Cloud HTTPS data access URL will be available from each data set landing page using the HTTPS File System link under Data Access & Tools after the publication date.

The SMAPVEX19-22 Massachusetts/Millbrook UAVSAR Mosaics, Version 1 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets consist of mosaicked Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) images corrected for terrain-flattened gamma.

The SnowEx23 October23 Ground Surface Roughness Reconstruction, Version 1 and SnowEx23 Oct23 Ground Surface Roughness Imagery, Version 1 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets contain ground surface roughness data and the corresponding imagery collected during the NASA SnowEx 2023 field campaign between 17 and 28 October 2023.

SMAP data are currently experiencing a data outage. The SMAP Science Data Systems (SDS), located at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, is closed and unable to process data due to wildfire activity in the area. Data processing will resume when JPL reopens.

The Images of Antarctic Ice Shelves, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The temporal coverage has been extended to include files from 1 June 2024 through 31 August 2024.

Data set DOI:  https://doi.org/10.5067/W87VCY3CW0MJ

The SnowEx23 Mar23 Snow Pit Measurements, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set presents snow pit measurements collected during the NASA SnowEx March 2023 Intensive Observation Period in Alaska, USA to use for calibration and validation with coincident airborne SWESARR and lidar measurements as part of the strategy focused on snow water equivalence and snow depth.

The Global Land Ice Measurements from Space (GLIMS) Glacier Database, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. This update includes new outlines for various regions and periods in Antarctica, Norway, the Andes, and the Himalayas. Other changes include updated attributes and retired glacial outlines in the subantarctic, and several glaciers in the low-latitude Andes now classified as extinct.

The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been experiencing a data outage due to planned mission activity today, Thursday, November 21, 2024. Operations will resume after planned mission activities are complete by Wednesday, November 22.

The SMAP/CYGNSS EASE-Grid Soil Moisture, Version 1, is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). 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 data and employing a slightly modified version of the baseline SMAP active-passive TB algorithm, the Single Channel Algorithm – Vertical polarization (SCA-V).

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will add 22 data sets from the Soil Moisture Active Passive (SMAP) collection to NASA Earthdata Cloud on 3 December 2024. Earthdata Cloud is NASA’s archive of Earth observations, hosted in Amazon Web Services (AWS). While these data sets will continue to be available via their current URLs and workflows, these legacy access methods will be retired soon.

The Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2 data set, available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through  30 June 2024. 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.

AMSR-E/AMSR2 Unified L3 Global Daily Ascending/Descending .25x.25 deg Ocean Grids, Version 1, AMSR-E/AMSR2 Unified L3 Global Weekly Ascending/Descending .25x.25 deg Ocean Grids, Version 1, and AMSR-E/AMSR2 Unified L3 Global Monthly Ascending/Descending .25x.25 deg Ocean Grids, Version 1, are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The High Mountain Asia Daily 5km Landslide Hazard Indicator, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated.  This update adds landslide hazard indicators (LHIs) for 1990 through 2014, retrodicted using the same 30-member ensemble climate model used to project LHIs through 2100.