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

NSIDC is pleased to announce that the Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors data set has been updated to Version 2. Version 2 includes updated data through 31 December 2012 for both hemispheres.

NASA IceBridge DMS L1B Geolocated and Orthorectified Images for 2013 Arctic are now available from NSIDC. For documentation, and to access the data, see the IceBridge DMS L1B data set landing page.

Reprocessing is complete and updated data are now available through 31 December 2012 for all Sea Ice Trends and Sea Ice Trends and Climatologies from SMMR and SSM/I-SSMIS data sets. With this update, the following changes have been implemented:

Investigators Eric Rignot, Jeremie Mouginot, and Bernd Scheuchl have added a 450 m resolution map to their "MEaSUREs InSAR-Based Antarctica Ice Velocity Map" data set. NSIDC offers these data as part of NASA's Making Earth System Data Records for Use in Research Environments (MEaSUREs) program.

Visit the data set landing page for more information and to obtain the data.

NASA IceBridge Ku-Band Radar Level-1B Geolocated Radar Echo Strength Profiles for 2012 Arctic are now available from NSIDC. For documentation, and to access the data, see the IceBridge Ku-Band Radar L1B catalog page.

Global, monthly land surface emissivity data from the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) are now available at NSIDC. These data complement existing passive microwave measurements from the Special Sensor Microwave Imager (SSM/I) and Advanced Microwave Sounding Unit (AMSU) by offering land emissivity from 18.7, 23.8, 36.5, and 89.0 GHz, as well from two lower frequencies: 6.9 and 10.65 GHz. According to Principal Investigator, Hamidreza Norouzi, observations from the lower C- and X-band frequencies are able to penetrate deeper into the soil layer.

NASA IceBridge Snow Radar L1B Geolocated Radar Echo Strength Profiles for 2012 Greenland are now available from NSIDC. For documentation, and to access the data, see the IceBridge Snow Radar L1B catalog page.

NASA IceBridge DMS Level-0 Raw Imagery for Arctic 2013 are now available from NSIDC. For documentation, and to access the data, see the IceBridge DMS L0 data set landing page.

Version 2 of the IceBridge MCoRDS Level-3 Gridded Ice Thickness, Surface, and Bottom data is now available from NSIDC. For data set documentation, details on changes in Version 2, and access to the data, see the IceBridge MCoRDS L3 data set landing page.

NSIDC is receiving new data from MEaSUREs, NASA's Making Earth System Data Records for Use in Research Environments Program. These offerings will expand NSIDC's current MEaSUREs roster with new data sets related to snow, sea ice, Greenland surface melt, and more. 

Version 3 reprocessing is now complete for the AMSR-E/Aqua Level-2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A) data set. Changes to the Version 3 algorithm for these data include:

NASA IceBridge POS/AV L1B Corrected Position and Attitude Data for Arctic 2013 are now available from NSIDC. For documentation, and to access the data, see the IceBridge POS/AV L1B data set landing page.

On 09 July 2013, the 2010 and 2011 Antarctica data were replaced with V01.1. For documentation, and to access data, see the IceBridge HiCARS 2 L2 Geolocated Ice Thickness data set landing page.

On 08 July, 2013, V01.1 data were replaced by V01.2. Data fields are revised in V01.2. For documentation, and to access data, see the IceBridge HiCARS 1 L2 Geolocated Ice Thickness data set landing page.

On 05 July, 2013, the V01 2009, 2010, and 2011 Antarctica data were replaced by V01.1. V01.1 data files are revised in the Seconds field and the Laser Derived Surface field. For documentation, and to access data, see the IceBridge Riegl Laser Altimeter L2 Geolocated Surface Elevation Triplets data set landing page.

On 05 July, 2013, the V01 2009, 2010, and 2011 Antarctica data were replaced by V01.1. In the V01.1 data files, magnetic base corrections are removed and fields in the data files are re-ordered. For documentation, and to access data, see the IceBridge Geometrics 823A Cesium Magnetometer L2 Geolocated Magnetic Anomalies data set landing page.

V01 data were replaced by V01.1. V01.1 data files include UTC timestamps and re-ordered fields. For documentation, and to access data, see the IceBridge BGM-3 Gravimeter L2 Geolocated Free Air Anomalies data set landing page.

On 31 January 2013 the ICESat Project Science Team announced that a correction to ICESat surface elevation data products is necessary due to an error in the range determination from transmit-pulse reference selection (centroid vs. Gaussian, G-C). Correction files and correction programs in FORTRAN and IDL are available via FTP. For more information about the findings and corrections please see Correction to ICESat Data Product Surface Elevations.

Updated Version 3 brightness temperature data are now available for the AMSR-E/Aqua Level-2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A) data set. Changes to the Version 3 algorithm for these data include:

NASA IceBridge Narrow Swath ATM L1B Qfit Elevation and Return Strength data for 2012 Antarctica are now available from NSIDC. For documentation, and to access data, see the IceBridge Narrow Swath ATM L1B Qfit Elevation and Return Strength catalog page.