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Data Set ID:

Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 2

Daily ice motion vectors are computed from a wide variety of sensors ranging from passive microwave radiometers, such as the Scanning Multichannel Microwave Radiometer (SMMR), to International Arctic Buoy Programme (IABP) buoy data. Daily gridded fields combine data from all sensors, from November 1978 through December 2012. Grids extend from 48.4° N to 90° N, and from 53.2° S to 90° S. Mean gridded fields include yearly, monthly, and weekly means, and a mean for the entire time series. Both daily and mean gridded fields are in 2-byte integer format, reprojected to 25 km Northern and Southern Hemisphere EASE-Grids. Browse images of mean fields are available in Portable Network Graphics (PNG) and Postscript (PS) formats. Raw ice motion vectors from each sensor are in tab-delimited ASCII text format. The complete data set is available via FTP.

Version Summary:

Changes to this algorithm include:

  • Added AMSR-E and NCEP/NCAR data for the Northern Hemisphere
  • Extended gridded data from November 1978 through December 2012
  • Updated data and documentation to reflect change to Version 2 (V2)

Geographic Coverage

Data Set Tabs

Spatial Coverage:
  • N: -53.2028, S: -90, E: 180, W: -180

  • N: 90, S: 48.4, E: 180, W: -180

Spatial Resolution:
  • 25 km x 25 km
  • 25 km x 25 km
  • 25 km x 25 km
Temporal Coverage
  • 25 October 1978 to 31 December 2012
Temporal Resolution:
1 month, 7 day, 1 day, 12 month
  • Sea Ice > Sea Ice Motion > Ice Velocity
  • Sea Ice > Sea Ice Motion
AQUA, BUOYS, DMSP 5D-2/F11, DMSP 5D-2/F13, DMSP 5D-2/F8, DMSP 5D-3/F17, Model, NIMBUS-7, NOAA-11, NOAA-12, NOAA-14, NOAA-9
Data Format(s):
  • PNG
  • Binary
  • Photoshop
  • ASCII Text (.txt)
Data Contributor(s): Mark Tschudi, Charles Fowler

Data Citation

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

Fowler, C., J. Maslanik, W. Emery, and M. Tschudi. 2013. Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors, Version 2. [indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. [Date Accessed].

Questions? Please contact:

NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA