Data Announcements

Reminder that after 31 December 2023, FTP access to NOAA@NSIDC data will no longer be available. Instead, you can now access NOAA@NSIDC data using the HTTPS protocol. We are transitioning from FTP to HTTPS for data distribution to improve user accessibility, particularly through web browsers.

NOAA@NSIDC is pleased to announce that the Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 data set, accessible through the National Snow and Ice Data Center (NSIDC), has been updated to include the time period of 01 January 2023 through 30 June 2023. This data set provides a consistent daily and monthly time series of sea ice concentrations beginning 25 October 1978 for both the north and south polar regions on a 25 km x 25 km grid.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 4 and MEaSUREs Greenland 6 and 12 day Ice Sheet Velocity Mosaics from SAR, Version 2 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. The temporal coverage for both the image mosaics and 6 and 12 day velocity mosaics data now spans from 01 January 2015 to 23 July 2023.

New versions (Version 5) of the ATLAS/ICESat-2 L3B Weekly Gridded Atmosphere and ATLAS/ICESat-2 L3B Monthly Gridded Atmosphere data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been released.

The MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, Version 5 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. The F/T status is now provided as a single Earth System Data Record derived from SMMR, SSM/I, and SSMIS from 1979 to 2020, and AMSR2 from 2021 onwards. The separate AMSR-E–AMSR2 data record (2002 - 2020) has been discontinued.

NOAA@NSIDC is pleased to announce that the Daily Great Lakes Ice Concentration, 1973 Onward, Version 1 data set is now available through the 2023 ice season. In addition, shapefiles for the 2003 ice season through the 2023 ice season have been added as a format of the data set. This data set consists of daily gridded lake ice concentration for the Laurentian Great Lakes from the NOAA Great Lakes Environmental Research Laboratory (GLERL).

The Randolph Glacier Inventory - A Dataset of Global Glacier Outlines, Version 7 dataset is now available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set is a global set of glacier outlines intended as a snapshot of the world’s glaciers beyond the ice sheets. It provides a single outline for each glacier at approximately the year 2000 as well as a set of attributes and other relevant auxiliary information.

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  31 March 2023. 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.

Due to planned maintenance aboard the SMAP spacecraft today September 14, 2023 data loss and latency impact are expected while the instrument is in safe-mode. Operations are estimated to resume as normal by tomorrow September 15, 2023. We apologize for any inconvenience.

The SnowEx20 Boise River Basin SnowMicroPen (SMP) Raw Penetration Force Profiles, Version 1 (SNEX20_BR_BSU_SMP) data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains raw penetration force profiles from the SnowEx 2020 time series campaign in the Boise River Basin in Idaho. Temporal coverage spans from 18 December 2019 to 24 January 2020.

The ATLAS/ICESat-2 L3B Monthly 3-Month Gridded Dynamic Ocean Topography (ATL23), Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

Version 3 of the ATLAS/ICESat-2 L3B Mean Inland Surface Water Data (ATL22) data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been released.

The SMAPVEX19-22 Millbrook Airborne Lidar and SMAPVEX19-22 Massachusetts Airborne Lidar, Version 1 data sets, are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These lidar measurements were collected in April and August 2022 in the vicinity of Millbrook, NY, and Petersham, MA during the SMAPVEX19-22 campaign.

The High Mountain Asia 5 Arc-Minute Hydrological Flow Direction for the Headwaters of the Amu Darya and Indus River Basins, 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 contains hydrological flow directions at 5 arc-minute resolution for the headwaters of the Amu Darya and Indus River basins. The domain spans parts of Afghanistan, Tajikistan, Kyrgyzstan, and Pakistan.

NOAA@ NSIDC is pleased to announce that MASAM2: Daily 4 km Arctic Sea Ice Concentration, Version 2 is now available. MASAM2 is a blend of the 4 km Multisensor Analyzed Sea Ice Extent – Northern Hemisphere (MASIE-NH) ice extent product and a 10 km AMSR2 sea ice concentration product. With Version 2, the data set provides ice concentration values that may range between 40 percent and 100 percent everywhere that the MASIE product has detected ice.

Version 3 of the ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography (ATL19) data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been released.  This data set contains monthly gridded dynamic ocean topography, derived from the along-track ATLAS/ICESat-2 L3A Ocean Surface Height product (ATL12).  Temporal coverage currently spans 14 October 2018 to 01 April 2023 and is updated regularly.  Spatial coverage is global.  Changes with

NOAA@NSIDC is pleased to announce that the Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956, Version 1 data set has been updated to Version 1.1. Version 1.1 adds quarter-degree gridded fields of sea ice concentration in NetCDF format to the existing shapefile and image representations of ice concentration from the Danish chart series.

The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 1 January 2023. This data set contains snow cover and sea ice extent derived from SMMR and DMSP-F8, -F11, -F13, and -F17 SMM/I and SSMIS brightness temperature measurements. These data are provided on the 25 km Northern Hemisphere EASE-Grid 2.0.

Version 6 of the ATLAS/ICESat-2 L3B Slope-Corrected Land Ice Height Time Series (ATL11) data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is now available.

The ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard (ATL20), Version 4 and ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly (ATL21), Version 3 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been released.