Data Announcements

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 2016 through 31 December 2017. Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as it 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.

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 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 May 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 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 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 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.

The NASA IceBridge ATM L2 Icessn Elevation, Slope, and Roughness 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 resampled and smoothed elevation measurements of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region land ice surface acquired using the NASA Airborne Topographic Mapper (ATM) instrumentation.

The NASA IceBridge Narrow Swath 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 22 November 2017. 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. Data Set DOI: https://doi.org/10.5067/CXEQS8KVIXEI

The NASA IceBridge KT19 IR Surface Temperature 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 surface temperature measurements of Arctic and Antarctic sea ice and land ice acquired by the Heitronics KT19.85 Series II Infrared Radiation Pyrometer and the NASA Airborne Topographic Mapper (ATM) instrument onboard the NASA P-3 and NASA DC-8 aircraft.

The NASA IceBridge ATM L1B Elevation and Return Strength with Waveforms 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. Data Set DOI: https://doi.org/10.5067/EZQ5U3R3XWBS

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 April 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 SMAP Science Data System (SDS) has updated the SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture data product at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

Version 1.3 of the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) for all sensors. The changes in this minor version update vary depending on the sensor and are listed by sensor in Table 11 of the user guide.

The High Mountain Asia ASCAT Freeze/Thaw/Melt Status data is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This Level-3 data set provides freeze/thaw/melt status over seasonally frozen land and snowmelt status over glaciated areas for high mountain Asia glacier and snow regions. Daily F/T/M status is derived from vertically polarized (V-pol), C-band (5.255 GHz) Advanced Scatterometer (ASCAT Metop-A and Metop-B) backscatter measurements.

The SMAP Science Data System (SDS) has released updated NASA SMAP data products at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The following NASA SMAP Level 4 data sets have been updated:

Reprocessing of the AMSR-E/AMSR2 Unified L2B Half-Orbit 25 km EASE-Grid Surface Soil Moisture, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is complete for all data from 2 July 2012 to present. The Beta 02 (B02) algorithm update corrects an error that caused only half of each swath to be processed. This data set includes surface soil moisture estimates derived from L1R brightness temperatures from AMSR2.

The SnowEx17 Time Series Sonic Snow Depth Measurement data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).