Data Announcements

31 January 2020

NOAA@NSIDC would like to make users aware of a data update and an error notice for the NOAA/NSIDC Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward data set.

Error notice:

A user has made us aware that the ice cover derived from the Danish Meteorological Institute Yearbooks may have been incorporated incorrectly into the Kelly grid source as it was used in G10010. The Kelly grids may have used the ice map from the subsequent month, rather than the intended month. The Kelly grids were used over April through August or September of 1901-1956. We are investigating the problem, and plan to correct the misalignment. We will inform registered users of the outcome. This apparent misapplication of the Kelly grid source is present in both V1 and V2.

Update notice:

Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, has been updated from Version 1 to Version 2.... more

22 January 2020

NOAA@NSIDC is pleased to announce that the International Ice Patrol (IIP) has updated their Iceberg Sightings Database through the 2019 iceberg season. The IIP has been collecting information on iceberg activity in the North Atlantic since 1913, and this database contains data from these sightings starting in 1960. The IIP data files include latitude and longitude of sighted icebergs, coded iceberg size and shape class, and date and time of the sighting. For more information on this data set and to access the data, please visit the International Ice Patrol Iceberg Sightings Database web page.

Data Set DOI:

10 January 2020

NOAA@NSIDC is pleased to announce the release of the Contribution to High Asia Runoff from Ice and Snow (CHARIS) Melt Model Output, 2001 – 2014 data set. The CHARIS project aimed to distinguish the specific contribution of seasonal snow and glacier ice melt in five major river basins of High Mountain Asia: Ganges, Brahmaputra, Indus, Amu Darya, and Syr Darya. CHARIS investigators developed a systematic way of using remote sensing, reanalysis, and in situ data to calibrate and run temperature index melt models. Applying this approach, they were able to draw conclusions for the entire study region. This data set contains input and output data for the temperature index melt model that was run for the CHARIS project at NSIDC.

To learn more and to access the data, see the data set landing page.

Data Set DOI: more

8 November 2019

NOAA@NSIDC is pleased to announce the release of version 2 of On-Ice Arctic Sea Ice Thickness Measurements by Auger, Core, and Electromagnetic Induction, from the Late 1800s Onward. In addition to sea ice thickness, the data set provides sea ice freeboard and snow depth on sea ice from on-ice measurements taken primarily using auger, coring devices, and electromagnetic (EM) sounding. When available, ice type is also included. Version 2 of the archive was compiled from 50 different expeditions starting with measurements from the Jeannette Expedition from 1879 to 1881, then to the Fram Expedition in 1894 and 1895, the Maud Expedition from 1922 through 1924, and continues to the most recent record to date from 2016.

The data set consists of 69,482 ice-thickness measurements from across the Arctic. The figure below shows a map with the location and density of the measurements.

These data were compiled by Benjamin Holt,... more

4 November 2019

NOAA@NSIDC has long partnered with the World Glacier Monitoring Service (WGMS) in Switzerland to improve the quality and completeness of glacier data. NSIDC’s User Services office gets questions from the public about glaciers that our data hold the answers to – seemingly simple questions like “What are the largest glaciers on the planet?”  Ann Windnagel set out to find answers during a stay with WGMS and found that it’s not such a simple matter. Read about her exploration of glacier data in an NSIDC Highlight.

28 October 2019

NOAA@NSIDC has updated their September and March Sea Ice Index sea ice animations in Google Earth with 2019 near-real-time data and replaced the 2018 near-real-time images with final data. To access the Google Earth files, see the NSIDC Data on Google Earth page.

12 September 2019

NOAA@NSIDC is pleased to announce that the NOAA Polar Orbiting Satellite (POES) Global Visible and Infrared Band Data from ESSA (1966 – 1972) and NOAA (1972 – 1978) Satellites, Version 1 data set, is now available at the National Snow and Ice Data Center (NSIDC). This data set consists of daily visible-band (VIS) imagery and infrared-band (IR) imagery from the Environmental Sciences Service Administration (ESSA) satellites, the Improved TIROS Operational System 1 (ITOS 1) satellite, and the National Oceanic and Atmospheric Administration (NOAA) satellites covering December 1966 through March 1978 (IR data begin in December 1972). The data set was created by scanning the analog imagery from these satellites held in the NOAA National Centers for Environmental Information (NCEI) physical archives in Asheville, NC. Images on 35 mm film, glossy prints, or paper halftone prints were scanned, processed, and reformatted. The data... more

8 August 2019

NOAA@NSIDC is pleased to announce that the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3 data set is now available through 2018. This data set provides a Climate Data Record (CDR) of sea ice concentration from passive microwave data. It provides a consistent, daily and monthly time series of sea ice concentrations from 09 July 1987 through 31 December 2018 for both the north and south polar regions on a 25 km x 25 km grid. Note that the 2018 data for near-real-time version of this data set called Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 1 has been removed since the final processed version supersedes the NRT version. If you have the 2018 NRT data, we suggest that you download and replace it with the 2018 final processed version of this data set.

NOAA/NSIDC Climate Data Record of Passive... more

11 July 2019

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 2018 through 31 December 2018.

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. Using the NRT product allows the Sea Ice Index to provide sea ice extent and concentration data for the previous day. When the final NASA Goddard sea ice concentration product becomes available, NOAA@NSIDC reprocesses the data for that time period so that the more tightly quality controlled and gap filled input data are used for the Sea Ice Index computations. To access the newest data, please visit the... more

8 July 2019

The Snow Data Assimilation System (SNODAS), Version 1 data set, accessible through the NOAA program at the National Snow and Ice Data Center (NOAA@NSIDC), was updated to correct for an extra “./“ in some of the data file paths. Users accessing this data set through a script may need to update their scripts to account for this correction.

In addition, the filename extensions for the uncompressed header files (.hdr) have been renamed to text (.txt) format. The decision to rename the file extensions was made to reduce users confusing these with standard .hdr files read by software packages like ENVI or ArcGIS. To access the data, visit the SNODAS landing page.

Data set DOI: