Data Set ID:
NSIDC-0051

Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1

This data set is generated from brightness temperature data and is designed to provide a consistent time series of sea ice concentrations spanning the coverage of several passive microwave instruments.The data are provided in the polar stereographic projection at a grid cell size of 25 x 25 km.

This is the most recent version of these data.

Version Summary:

Initial release

COMPREHENSIVE Level of Service

Data: Data integrity and usability verified; data customization services available for select data

Documentation: Key metadata and comprehensive user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools and data customization services

See All Level of Service Details

Parameter(s):
  • SEA ICE > SEA ICE CONCENTRATION
Data Format(s):
  • Binary
  • PNG
Spatial Coverage:
N: -39.23, 
N: 90, 
S: -90, 
S: 30.98, 
E: 180, 
E: 180, 
W: -180
W: -180
Platform(s):DMSP 5D-2/F11, DMSP 5D-2/F13, DMSP 5D-2/F8, DMSP 5D-3/F17, Nimbus-7
Spatial Resolution:
  • 25 km x 25 km
Sensor(s):SMMR, SSM/I, SSMIS
Temporal Coverage:
  • 26 October 1978 to 31 December 2020
(updated yearly)
Version(s):V1
Temporal Resolution1 day, 1 monthMetadata XML:View Metadata Record
Data Contributor(s):Claire Parkinson, Per Gloersen, H. Zwally, Donald Cavalieri, Walter Meier, F. Fetterer, Kenneth Knowles, Matthew Savoie, Mary Brodzik

Geographic Coverage

Other Access Options

Other Access Options

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Cavalieri, D. J., C. L. Parkinson, P. Gloersen, and H. J. Zwally. 1996, updated yearly. Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/8GQ8LZQVL0VL. [Date Accessed].

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How To

How to display and analyze the Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data
The Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data are distributed in gridded binary format. NSIDC provides IDL routines to ingest and read the data. These tools can be found at the... read more
How do I import sea ice data binary data files into ArcGIS?
The following are instructions describing how to import sea ice binary files into ArcGIS. These instructions were tested with ArcMap 10.5 and 10.6. 1. Rename the Data File. In order to be able to import a Polar Stereographic sea ice concentration file into ArcGIS, you will need to: Rename the... read more
How do I convert NSIDC-0051 sea-ice concentration data from binary to GeoTIFF?
You will first need to have GDAL installed on your system before proceeding on to the following steps. NSIDC User Services is not able to provide support for installing GDAL, but we have found using a package manager such as MacPorts (https://guide.macports.... read more
Subsetting and Reformatting with the NSIDC PyRS Tool
The NSIDC Python Reformatting and Subsetting (PyRS) tool is a command line tool which prompts the user to specify data reformatting and subsetting preferences. Output formats available are native, GeoTIFF, and NetCDF. If the dataset is polar stereographic, subsetting can be performed in the... read more
Subsetting and Reformatting with the NSIDC PyRS Docker Container
The NSIDC Python Reformatting and Subsetting (PyRS) tool is a user prompt command line tool for data reformatting and subsetting. PyRS is designed to work with select datasets in binary format: Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-... read more
Filter and order from a data set web page
Many NSIDC data set web pages provide the ability to search and filter data with spatial and temporal contstraints using a map-based interface. This article outlines how to order NSIDC DAAC data using advanced searching and filtering.  Step 1: Go to a data set web page This article will use the... read more

FAQ

Descriptions of and Differences between the NASA Team and Bootstrap Algorithms
NSIDC currently archives passive microwave sea ice concentration products based on two algorithms: the NASA Team algorithm and the Bootstrap algorithm. Both algorithms were developed by researchers at the NASA Goddard Space Flight Center in the 1980s. Provided below are two short summaries of the... read more