Data Announcements

26 August 2020

NOAA@NSIDC is pleased to announce the release of the U.S. National Ice Center Daily Marginal Ice Zone Products data set. The marginal ice zone (MIZ) is defined by the World Meteorological Organization (WMO) as “the region of an ice cover which is affected by waves and swell penetrating into the ice from the open ocean.”

This data product is a U.S. National Ice Center (USNIC) rendering of the MIZ as the band of ice in concentrations between 1/10 and 8/10, or about 10% to 80% concentration, that surrounds Arctic and Antarctic pack ice with higher concentrations. The time series begins in September 2004 for the Arctic and January 2010 for the Antarctic. The products are available in shapefile, ASCII, and Google Earth KMZ formats.

The mission of the USNIC is to provide ice and snow products, ice forecasting, and other environmental intelligence services for the U.S. government. The USNIC products are designed to meet the operational needs of those planning... more

6 August 2020

NOAA@NSIDC is pleased to announce that the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3 data set has been updated to include the time period of 01 January 2019 through 31 December 2019. This data set provides a provides a consistent, daily and monthly time series of sea ice concentrations from 09 July 1987 through 31 December 2019 for both the north and south polar regions on a 25 km x 25 km grid.

Note that the 2019 data for near-real-time (NRT) version of this data set called the 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 2019 NRT data, we suggest that you download and replace it with the 2019 final processed version of this data set. To access the latest data, visit the NOAA/NSIDC Climate Data Record of Passive Microwave... more

28 July 2020

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 2019 through 31 December 2019.

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. This has been done for the year 2019. To access the newest... more

14 July 2020

NOAA@NSIDC is pleased to announce the release of the 2020 ice season data for the Daily Great Lakes Ice Concentration, 1973 Onward data set. This data set consists of gridded lake ice concentration for the Laurentian Great Lakes from the NOAA Great Lakes Environmental Research Laboratory (GLERL). The data are provided as ASCII text files along with corresponding browse image files in JPEG format beginning in 1973 and going through the present.

GLERL produces this product to help researchers and others understand how, when, and where lake ice forms and breaks up. For many years, GLERL has obtained operational ice charts from the Canadian Ice Service and the U.S. National Ice Center. These two ice services make the maps that shipping interests use when navigating the Great Lakes in winter. This data set is the product of a project conducted by NOAA GLERL and the Cooperative Institute for Great Lakes Research (CIGLR) at the University of Michigan. The series of digital... more

8 June 2020

NOAA@NSIDC is pleased to announce a data update to the Global Lake and River Ice Phenology Database. A previous set of freeze/thaw data for Lake Suwa in Japan that had been removed due to an error in the date has been corrected and added back to the database. The data run from 1630 to 2018 and can be accessed via the Global Lake and River Ice Phenology search interface using lake code ARAI1.

In addition, six years of freeze/thaw data for the Tornio River in Finland has been added to the database so that the data now run from 1693 to 2013. Those data can also be accessed via the search interface using river code EK26.

For more information about these updates and other Lake and River Ice Phenology data, please visit the data set landing page.

Data Set DOI: https://doi... more

31 March 2020

NOAA@NSIDC is pleased to announce the release of the Daily Great Lakes Ice Concentration, 1973 Onward data set. This data set consists of gridded lake ice concentration for the Laurentian Great Lakes from the NOAA Great Lakes Environmental Research Laboratory (GLERL). The data are provided as ASCII text files along with corresponding browse image files in JPEG format beginning in 1973 and going through the present.

GLERL produces this product to help researchers and others understand how, when, and where lake ice forms and breaks up. For many years, GLERL has obtained operational ice charts from the Canadian Ice Service and the U.S. National Ice Center. These two ice services make the maps that shipping interests use when navigating the Great Lakes in winter. This data set is the product of a project conducted by NOAA GLERL and the Cooperative Institute for Great Lakes Research (CIGLR) at the University of Michigan. The series of digital operational chart data used... more

5 March 2020

NOAA@NSIDC is pleased to announce the “International Ice Patrol Annual Count of Icebergs South of 48 Degrees North, 1900 to Present” data set. The data are being released in collaboration with the U.S. Coast Guard (USCG) International Ice Patrol (IIP).

Every year during the ice season, the IIP surveys icebergs in the vicinity of the Grand Banks of Newfoundland within the western Atlantic Ocean and issues daily iceberg charts. The number that drift south of 48° N is significant because these pose a larger threat to transatlantic shipping. The annual count is an indicator of the severity of the iceberg season and its impact on mariners in the region.

This long, simple data record provides a wealth of information for identifying and explaining trends in iceberg season severity. Over the years, the technology used by the IIP has gotten better at detecting icebergs; and because of this, the count has trended upward. The User Guide points readers to a method of normalizing... more

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: http://dx.doi.org/10.7265/N56Q1V5R

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: https://doi.org/10.7265/TQFB-... more