Data Announcements

The SMAP Project performs annual reprocessing of all its science data products based on improvements in the algorithms and supporting information. As part of this routine reprocessing, the SMAP Science Data System (SDS) has now released new versions of Level-1, -2, -3, and -4 data products, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Several improvements were made to both standard and enhanced SMAP data products, including the following highlights:

The SnowEx20 Community Snow Depth Probe 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, collected during the SnowEx 2020 Intensive Operation Period (IOP) in Grand Mesa, Colorado, contains in situ snow depth measurements. Snow depth was measured using one of three instruments - Magnaprobe, Mesa 2, or pit ruler. Pit ruler data were collected from 150 snow pits identified for the Grand Mesa IOP.

The SnowEx20 SnowMicroPen (SMP) Raw Penetration Force Profiles, 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 raw penetration force profiles from the SnowEx 2020 Intensive Observation Period in Grand Mesa, Colorado. Measurements were taken using the SnowMicroPen (SMP), a digital snow penetrometer. The data files contain force measurements (in Newtons) at various snow depths. Data are available from 28 January 2020 through 12 February 2020.

The Sea Ice Trends and Climatologies from SMMR and 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 through 31 December 2019. This data set contains sea ice concentrations, ice-covered area, ice persistence, and sea ice extent for the Arctic and Antarctic.

NOAA@NSIDC is pleased to announce the release of the U.S. National Ice Center Daily Marginal Ice Zone Products data set. The marginal ice zone (MIZ) is defined by the World Meteorological Organization (WMO) as “the region of an ice cover which is affected by waves and swell penetrating into the ice from the open ocean." This data product is a U.S. National Ice Center (USNIC) rendering of the MIZ as the band of ice in concentrations between 1/10 and 8/10, or about 10% to 80% concentration, that surrounds Arctic and Antarctic pack ice with higher concentrations.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 3 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated to a new version and new data access options are also available. The data have been reprocessed using upgraded software and a revised DEM. There are two new parameters, a calibrated sigma0 radar backscatter product and a calibrated and radiometrically terrain-corrected gamma0 radar backscatter product.

The Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to a new version. The data set now spans 1917 to 2020, the file format has changed to .csv, and errors in the computation of the fractional time of day have been corrected. The data access location for this data set has also changed. Users accessing this data set through a script will need to update accordingly.

The IceBridge ATM L2 Icessn Elevation, Slope, and Roughness, Version 2 data set has been updated to include data from the 2019 Antarctic campaign, from 25 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The IceBridge ATM L1B Elevation and Return Strength, Version 2 data set has been updated to include data from the 2019 Antarctic campaign, from 24 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region ice surface acquired by the NASA Airborne Topographic Mapper (ATM) instrumentation.

The IceBridge ATM L1B Elevation and Return Strength with Waveforms, Version 1 data set has been updated to include data from the 2019 Antarctic campaign, from 24 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The IceBridge ATM L1B Near-Infrared Waveforms, Version 1 data set has been updated to include data from the 2019 Antarctic campaign, from 24 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains geolocated waveforms measured by the Airborne Topographic Mapper (ATM) near-infrared (NIR) lidar.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 3 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated to a new version and new data access options are also available. The data have been reprocessed using upgraded software and a revised DEM. There are two new parameters, a calibrated sigma0 radar backscatter product and a calibrated and radiometrically terrain-corrected gamma0 radar backscatter product.

The IceBridge Narrow Swath ATM L1B Elevation and Return Strength, Version 2 data set has been updated to include data from the 2019 Antarctic campaign, from 24 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements of Greenland, Arctic, and Antarctic sea ice acquired using the NASA Airborne Topographic Mapper (ATM) narrow-swath instrumentation.

The IceBridge Narrow Swath ATM L1B Elevation and Return Strength with Waveforms, Version 1 data set has been updated to include data from the 2019 Antarctic campaign, from 24 October 2019 through 20 November 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements with corresponding waveforms of Greenland, Arctic, and Antarctic sea ice.

The AMSRE/AMSR2 Unified L2B Global Swath Surface Precipitation, 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 provides instantaneous surface precipitation rate and type over land and ocean, and precipitation profiles over ocean between 89.24 degrees north and south latitudes with spatial resolutions of 10 km spatial resolution along the track and 5 km spatial resolution along the scan.

NOAA@NSIDC is pleased to announce that the NOAA@NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3 data set has been updated to include the time period of 01 January 2019 through 31 December 2019.

icepyx is a python software library for accessing and working with ICESat-2 data. Acting as a wrapper around Application Programming Interfaces (APIs) supported by the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), icepyx enables data acquisition in as few as three lines of code.

NOAA@NSIDC is pleased to announce that the Sea Ice Index has been updated from near-real-time data to final data for the time period 01 January 2019 through 31 December 2019. Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as its input. This NRT product can contain missing data and has less quality control procedures applied to it than the final sea ice concentration input product provided by NASA Goddard. However, the final input product often lags behind the present by approximately a year.

NOAA@NSIDC is pleased to announce that the Daily Great Lakes Ice Concentration, 1973 Onward, Version 1 data set has been updated with the 2020 ice season data. This data set consists of gridded lake ice concentration for the Laurentian Great Lakes from the NOAA@NSIDC Great Lakes Environmental Research Laboratory (GLERL).

The ATLAS/ICESat-2 L3A Sea Ice Freeboard, Version 3 (ATL10) data set from the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) mission is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided.