Data Announcements

SMAP Level-4 soil moisture and carbon data have been updated to Version 3 and are available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) via the following product pages: SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP), Version 3 Data set DOI: https://doi.org/10.5067/B59DT1D5UMB4 SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU), Version 3 Data set DOI: http

NSIDC would like to announce a change to data access for the MEaSUREs Annual Greenland Outlet Glacier Terminus Positions from SAR, Version 1 data set. Data access is now solely through our primary portal at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0642.001/. File level spatial and temporal metadata have been added to aid in searching the data. DOI: https://doi.org/10.5067/DC0MLBOCL3EL

MEaSUREs has added SSMIS data from the F16 platform to the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program. Data Set DOI: https://doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0630.001

Version 1 of the VIIRS/NPP Snow Cover 6-Min Swath 375m (VNP10) data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The VIIRS snow cover algorithm has been specifically designed to be compatible with MODIS Terra and Aqua Version 6 snow cover data sets, to ensure continuity between the products and facilitate a climate-data record from the three sensors.

MEaSUREs has added SSMIS data from the F17, F18, and F19 platforms to the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Also, AMSRE data are now available as v1.2. The minor changes include:

The NASA IceBridge MCoRDS L1B Geolocated Radar Echo Strength Profiles, Version 2 data set now includes data for the 2014 Antarctica campaign. This data set contains radar echograms taken from the Center for Remote Sensing of Ice Sheets (CReSIS) ultra Multichannel Coherent Radar Depth Sounder (MCoRDS) over land and sea ice in the Arctic and Antarctic. Data set DOI: https://doi.org/10.5067/90S1XZRBAX5N

NSIDC would like to announce a change to data access for the MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1.2 data set. Data access is now solely through our primary portal at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0481.001/. File level spatial and temporal metadata have been added to aid in searching the data.

The NASA IceBridge Snow Radar L1B Geolocated Radar Echo Strength Profiles, Version 2 data set now includes data for the 2014 Antarctica campaign. This data set contains radar echograms taken from the Center for Remote Sensing of Ice Sheets (CReSIS) ultra wide-band snow radar over land and sea ice in the Arctic and Antarctic. Data set DOI: https://doi.org/10.5067/FAZTWP500V70

NASA IceBridge Narrow Swath ATM L1B Elevation and Return Strength data for 2016 Antarctica are now available from 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. Data set DOI: https://doi.org/10.5067/CXEQS8KVIXEI

NASA IceBridge ATM L1B Elevation and Return Strength data for 2016 Antarctica are now available from 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 using the NASA Airborne Topographic Mapper (ATM) instrumentation. Data set DOI: https://doi.org/10.5067/19SIM5TXKPGT

NASA IceBridge ATM L2 Icessn Elevation, Slope, and Roughness data for 2016 Antarctica are now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). 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. Data Set DOI: https://doi.org/10.5067/CPRXXK3F39RV

An issue involving the atmospheric correction algorithm used to process SMAP Level-1B (L1B) brightness temperatures, as noted in the Select Data Files Impacted by SMAP L1B Processing Error data announcement, has been corrected as of 24 April 2017. The SMAP Science Data System (SDS) has reprocessed all affected SMAP Level-1B (L1B), Level-1C (L1C), and Level-2 (L2) radiometer files that had previously been removed. These reprocessed files contain a Composite Release ID (CRID) number of R15060 in the file name.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, 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, 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.

The Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated through 28 February 2017. Data Set DOI: https://doi.org/10.5067/8GQ8LZQVL0VL

NASA IceBridge HiCARS 2 L1B Time-Tagged Echo Strength Profiles data are now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains Antarctica echo strength profiles from the Hi-Capability Radar Sounder (HiCARS) Version 2 instrument. Data set DOI: https://doi.org/10.5067/0I7PFBVQOGO5

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with velocity maps for 2016. This release, Version 1.2, includes new browse images, metadata files, and more descriptive file names, and fills in some missing 2015 files. These data are generated through a grant from the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

NASA IceBridge DMS Camera Calibration files for 17 September 2009 to 05 October 2016 are now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This collection contains DMS camera calibration summary reports in PDF format for missions flown over Antarctica and Greenland. Data Set DOI: https://doi.org/10.5067/Z65C335BWXC3

NASA IceBridge BGM-3 Gravimeter L2 Geolocated Free Air Anomalies replacement data are now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). On May 31, 2017 the entire data collection was replaced to correct erroneous data found in Column 6 (GRV) for some of the lines. This data set contains free air anomalies measurements taken over Antarctica using the BGM-3 Gravimeter. Data set DOI: https://doi.org/10.5067/8DJW56PKY133

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of mean monthly velocity maps for selected glacier outlet areas.

In an effort to continue to make the Sea Ice Index a user friendly, go-to source for sea ice information, NOAA@NSIDC has added the median sea ice extent line to the daily and monthly Sea Ice Index concentration images. Previously, this line only appeared on the daily and monthly sea ice extent images. The addition of the median extent line to the concentration images helps to inform users of how sea ice extent and concentration relate to one another.