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

The Aquarius L3 Weekly Polar-Gridded Landscape Freeze/Thaw Data, Version 5 data set is now available from the National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The IceBridge-Related Sander AIRGrav L1B Geolocated Free Air Gravity Anomalies data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) from 29 April 2012 to 31 December 2016. This data set contains Greenland and Antarctica gravity measurements taken from the Sander Geophysics AIRGrav airborne gravity system.

The IceBridge ATM L4 Surface Elevation Rate of Change data set has been updated to include measurement comparisons of 2017 data to earlier years over Greenland at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The SnowEx17 Ground Penetrating Radar data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set contains the results of a ground penetrating radar survey conducted at Grand Mesa, Colorado, between 08 February 2017 and 23 February 2017 as part of the 2017 SnowEx campaign. Data files include two-way travel time, calculated snow depth, and calculated snow water equivalent.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with mosaics through June 2018. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides 6 and 12-day 50 m resolution image mosaics of the Greenland coastline and ice sheet periphery beginning in January 2015.

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with data through December 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland beginning 1 January 2009.

The AMSR-E/AMSR2 Unified L3 Daily 6.25 km Polar Gridded 89 GHz Brightness Temperatures, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This product uses the Japan Aerospace Exploration Agency (JAXA) AMSR2 Level-1R input brightness temperatures that are calibrated (unified) across the JAXA AMSR-E and AMSR2 Level-1R products.

The SnowEx17 Ground-Based UWScat Ku- and X-Band Frequency Modulated Continuous Wave Radar, Version 1 data set has been updated from a basic to a standard level of service at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Please see our Adding clarity to NSIDC data support with new Level of Service (LoS) model article for more information.

The SnowEx17 Time Series Sonic Snow Depth Measurement Array, Version 1 data set has been updated from a basic to a standard level of service at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Please see our Adding clarity to NSIDC data support with new Level of Service (LoS) model article for more information.

The SnowEx17 CRREL Differential GNSS Survey data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce the release of the High Mountain Asia ASCAT Freeze/Thaw/Melt Status, 2009-2017 data set. This data set contains bulk landscape frozen or thawed status over seasonally frozen land as well as snowmelt status over glacierized areas for the High Mountain Asia region.

The DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures, Version 2 data set, distributed by the National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is now available through July 05 2018. Access to the data and documentation can be found through the data set landing page.

Data Set DOI: https://doi.org/10.5067/3EX2U1DV3434

The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 4 data set, distributed by the National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is now available through July 05 2018. Access to the data and documentation can be found through the data set landing page.

Data Set DOI: https://doi.org/10.5067/AN9AI8EO7PX0

With over 1,100 data sets archived and distributed through the National Snow and Ice Data Center, it is expected that not all data sets and associated documentation are created equal. Some data are part of a larger, continuously-funded long-term mission producing global climate data records, while others are small-scale or one-time efforts targeted for initial satellite validation studies. This broad spectrum of data purposes, communities, and funding sources leads to varying levels of service (LoS) provided by NSIDC.

The Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS dataset, distributed through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is now at Version 3.1. In the latest release, the sea ice concentration field derived from the Bootstrap algorithm uses an "open water" identifier that is calculated daily in May and October. In Version 3.0, this value was calculated using a single monthly value for May and a single monthly value for October.

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce that Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1 data set has been updated through 31 December 2017. This data set provides a consistent time series of daily and monthly averaged sea ice concentrations beginning in October 1978.

Data set DOI: https://doi.org/10.5067/8GQ8LZQVL0VL

The MEaSUREs MODIS Mosaic of Antarctica 2013-2014 (MOA2014) Image Map, Version 1 data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, includes two image maps produced from composited image swath data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) over Antarctica for the 2013-2014 austral summer season.

The NASA IceBridge Sea Ice Freeboard, Snow Depth, and Thickness Quick Look data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated to include data from 22 March 2018 to 16 April 2018. This data set is an evaluation product containing derived geophysical data products retrieved over the Arctic sea ice cover using the IceBridge Airborne Topographic Mapper (ATM), Snow Radar, Digital Mapping System (DMS), and KT19 pyrometer.

The NASA IceBridge LDEO Gravimeter Suite L1B Geolocated Free Air Gravity Anomalies data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), with data available from 22 March 2017 through 31 March 2017.

The NASA IceBridge ATM L1B Elevation and Return Strength data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 25 November 2017.

This data set contains spot elevation measurements of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region ice surface acquired using the NASA Airborne Topographic Mapper (ATM) instrumentation.