NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)
Data Updates
NSIDC has discovered some large data gaps in the 2018 F18 Brightness Temperature record affecting the DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 5 data set. Northern and Southern Hemisphere data files from 10 February through13 March 2018 and from 30 September through 31 October 2018 may contain only zero values. NSIDC is investigating the issue and will reprocess data files once the problem has been identified.
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 2018. This data set contains sea ice concentrations, ice-covered area, ice persistence, and sea ice extent for the Arctic and Antarctic.
The data access locations for multiple passive microwave data sets, available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have changed. Users accessing these data through a script will need to update accordingly. The new data access URLs are provided below:
The data access locations for multiple passive microwave data sets, available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have changed. Users accessing these data through a script will need to update accordingly. The new data access URLs are provided below:
The IceBridge Sea Ice Freeboard, Snow Depth, and Thickness Quick Look, Version 1 data set has been updated to include data for the 2019 Arctic campaign from 06 April 2019 to 22 April 2019 at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This quick look product is experimental and designed to be applicable for time-sensitive projects such as sea ice forecasting.
Data Set DOI: https://doi.org/10.5067/GRIXZ91DE0L9
The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with mosaics through May 2019. This data set is produced under the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program and contains 6-day and 12-day 50 m resolution image mosaics of the Greenland coastline and ice sheet periphery.
The VIIRS/NPP Snow Cover Daily L3 Global 375m SIN Grid, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). T
The Nimbus-7 SMMR Derived Monthly Global Snow Cover and Snow Depth, Version 1 data set will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 27 August 2019. After this date, the data will no longer be accessible, but the data set documentation will remain available for future reference.
The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 31 December 2018. This data set contains snow cover and sea ice extent derived from SMMR and DMSP-F8, -F11, -F13, and -F17 SMM/I and SSMIS brightness temperature measurements. These data are provided on the 25 km Northern Hemisphere EASE-Grid 2.0.
The MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data for 2018.
The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include all available data from 1985 through 2018 for all regions. Additionally, the sensor name abbreviations in the .meta files have changed. This data set consists of mean monthly velocity maps for selected glacier outlet areas from 1 March 1985 through 31 December 2018.
The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data from December 2018 and January 2019.
The MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data for 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains two global records of the daily freeze/thaw (F/T) status of the landscape.
The IceBridge Watson-Gyro Fluxgate Magnetometer L1B Time-Tagged Magnetic Field, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) from 29 December 2008 through 14 January 2013. This data set contains time-registered Level-1B field readings taken over Antarctica using the Watson-Gyro Fluxgate Magnetometer instrument. The data were collected as part of Operation IceBridge funded aircraft survey campaigns.
The ASO L4 Lidar Snow Depth 3m UTM Grid, Version 1; ASO L4 Lidar Snow Depth 50m UTM Grid, Version 1; and ASO L4 Lidar Snow Water Equivalent 50m UTM Grid, Version 1 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to include new data for 2013 and 2018.
The High Mountain Asia GFDL FLOR Modeled Daily Precipitation for Extreme Analysis, 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 includes three climate simulations of daily precipitation over the Himalayan region for summer and winter: two 30-member ensemble simulations from 1961-2000 and 2061-2100, and one present-day climate simulation from 1982 to 2017 forced with observed sea surface temperatures, air temperatures, and winds.
The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 5 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains daily gridded brightness temperatures derived from the Special Sensor Microwave/Imager (SSM/I) sensor aboard the Defense Meteorological Satellite Program (DMSP) F8, F11, and F13 platforms and the Special Sensor Microwave Imager/Sounder (SSMIS) sensor aboard the DMSP F17 and F18 platforms.
The DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been extended through 03 April 2019. This data set contains brightness temperatures derived from the Special Sensor Microwave/Imager (SSM/I) and the Special Sensor Microwave Imager/Sounder (SSMIS) instruments. The spatial resolution is 25 km for all channels; the 85 and 91 GHz channels are also provided at a 12.5 km resolution.
The Arctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite Data, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated from a basic to a standard level of service. Please review our Levels of Service (LoS) page for more information.
The ATLAS/ICESat-2 L3A Ocean Surface Height, Version 1 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 along-track sea surface heights at variable length scales over cloud-free regions. Estimates of height distributions, surface roughness, surface slope, and apparent reflectance are also provided.