Data Announcements

13 January 2022

The Daily Great Lakes Ice Concentration, 1973 Onward, Version 1 data set has been updated. There were some missing daily ASCII files for the years 2007 to 2009 and 2011 to 2016. These missing files for additional days have been added to the archive and are now available.

This data set consists of daily gridded lake ice concentration for the Laurentian Great Lakes from the NOAA Great Lakes Environmental Research Laboratory (GLERL).

Data set DOI: https://doi.org/10.7265/krkb-f591

9 December 2021

NOAA@NSIDC would like to make you aware of a change to the data used to produce the U.S. National Ice Center Arctic and Antarctic Sea Ice Concentration and Climatologies in Gridded Format, Version 1 data set. As of October 2021, USNIC revised the way they indicate first-year ice (FYI) on the Arctic weekly ice charts that are the basis for this data set. USNIC has chosen to only use WMO SIGRID code “86, First-Year Ice” for all FYI designations. Thus, all charts on the USNIC website, as well as the SIGRID-3 format version of those charts that serve as input for this product, will have FYI indicated by 86 only. Gradations within the first-year category will no longer be routinely charted. These sub-categories are SIGRID codes 87, 88, 89, 91, and 93 which correspond to thin FYI, thin FYI – stage1, thin FYI – stage2, medium FYI, and thick FYI, respectively.

USNIC has made this change to reduce the time analysts... more

17 November 2021

NOAA@NSIDC is pleased to announce that the Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 data set has been updated to include the time period of 01 January 2021 through 31 May 2021. This data set provides a consistent daily and monthly time series of sea ice concentrations from 25 October 1978 through 31 May 2021 for both the north and south polar regions on a 25 km x 25 km grid.

Note that the 2021 data for January to May for the near-real-time (NRT) version of this data set, Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2, have been removed since the final processed version supersedes the NRT version. If you have 2021 NRT data, we suggest that you download and replace it with the 2021 final processed version of this data set.

To access these data and view the... more

11 October 2021

NOAA@NSIDC is pleased to announce the release of the Rutgers Northern Hemisphere 24 km Weekly Snow Cover Extent, September 1980 Onward data set. This data set provides weekly snow cover extent at a 24 km resolution for the Northern Hemisphere from September 1980 in NetCDF format. The time series currently goes to September 2021 but will be updated on an annual basis every September.

The data set is created from a combination of paper and digital snow cover charts. Prior to June 1999, these data were digitized from paper snow charts generated by NOAA analysts and based primarily on the interpretation of visible satellite observations. In the late 1990s, weekly chart production was succeeded by the U.S. National Ice Center (USNIC) Interactive Multisensor Snow and Ice Mapping System (IMS). From June 1999 onward, IMS snow output at 24 km resolution is appended to the record.

The paper charts had been previously... more

7 October 2021

NOAA@NSIDC is pleased to announce that the 2021 ice season data is now available from the Daily Great Lakes Ice Concentration, 1973 Onward data set. The new data span 22 November 2020 through 29 April 2021. This data set consists of daily gridded lake ice concentration for the Laurentian Great Lakes from the NOAA Great Lakes Environmental Research Laboratory (GLERL). The data are provided as gridded ASCII text files along with corresponding browse image files in .jpg format.

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

Data Set DOI: https://doi.org/10.7265/krkb-f591

30 August 2021

NSIDC is pleased to announce the release of the Arctic Sea State 2015 Field Campaign, Version 1 data set. The U.S. Office of Naval Research (ONR) Sea State Departmental Research Initiative (DRI) field campaign was conducted in October and November of 2015 in the Beaufort Sea in order to better understand how waves and ice interact as Arctic ice advances in late autumn. As sea ice has retreated under the influence of warming climate, fetch (distance of open water over which wind can act to build waves) has grown, resulting in an increasingly dynamic sea state. The melt season has gotten longer, giving ocean swell more time in which to build. Pancake ice, previously uncommon, is now characteristic of the western Arctic in autumn. Data collection took place under four sampling modes: wave experiments via buoys, ice stations, flux stations, and ship surveys. This data set provides the results of this field campaign in NetCDF data files.  Data were prepared for publication and... more

17 August 2021

NOAA@NSIDC and the U.S. National Ice Center are pleased to announce that the IMS Daily Northern Hemisphere Snow and Ice Analysis data set is now available in NetCDF format for the 4 km and 1 km gridded data.

The NetCDF version of this product is the result of a partnership between data experts at the USNIC, NOAA STAR, the NOAA Meteorological Development Laboratory (MDL), the NOAA PolarWatch group, and NOAA@NSIDC. The NetCDF files are now being produced by STAR. Production at the USNIC will begin at a later date.

Now that these data are in NetCDF format, work will begin to bring them into the PolarWatch data portal. The PolarWatch portal will provide users with capabilities for viewing and manipulating IMS data fields.

Access... more

16 August 2021

NOAA@NSIDC is pleased to announce that the daily updating of the U.S. National Ice Center Daily Marginal Ice Zone Products, Version 1 data set has resumed. Data from 14 April 2021 onwards are now available, extending the series that begins on 19 October 2004. The data set will continue to be updated on a daily basis.

Access to the data and documentation is available from the data set web page at NSIDC.

Data Set DOI: doi: https://doi.org/10.7265/ggcq-1m67

16 August 2021

NOAA@NSIDC is pleased to announce that the weekly updating of the U.S. National Ice Center Arctic and Antarctic Sea Ice Concentration and Climatologies in Gridded Format, Version 1 data set has resumed. Data from 14 April 2021 onwards are now available, extending the series that begins on 6 January 2003. The data set will continue to be updated on a weekly basis.

Access to the data and documentation is available from the data set web page at NSIDC.

Data Set DOI: https://doi.org/10.7265/46cc-3952

9 August 2021

NOAA@NSIDC is pleased to announce that photos of glaciers in the Kenai Fjords National Park have been added to the Glacier Photograph Collection. These 281 photos are a special collection of photos that are part of an ongoing repeat photography project documenting coastal glacier change in Kenai Fjords National Park in south-central Alaska. The oldest photos in the collection were taken in the summer of 1909 when USGS surveyors, U.S. Grant and D.F. Higgins, completed a detailed survey of the tidewater glaciers along the southeastern coast of the Kenai Peninsula. Nearly 100 years later, in 2004 and 2005, USGS Geologist, Dr. Bruce Molnia (with assistance from KEFJ employee, Jim Pfeiffenberger) identified the locations of the photo sites and repeated the photos, providing a 94-year comparison of change at individual glaciers. The most recent photos in the collection are from 2020. In addition, 244 of the photos have also been added to the Repeat Glacier Photographs collection. The... more