Operation IceBridge (Version 2)
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NASA Operation IceBridge Program Office, Goddard Space Flight Center |
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Dr. Nathan Kurtz and the OIB Program Office |
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Scanning Lidar Altimeter, Snow Radar, Cameras |
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Arctic Ocean |
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2009-2013 |
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All flights with usable data are combined for each campaign. Annual campaigns are conducted in the appropriate spring based either in Greenaland or Punta Arenas, Chile.. The 'Freeboard, Snow Depth, and Ice Thickness' data product from NSIDC was used to form 50-km clusters, combining data from more than one flight if the flights were less than 10 days apart. The spacing of the point thickness estimates is approximately 25 m. The original data set includes a variable for the uncertainty in the estimated ice thickness that is used to select points with an uncertainty of less than 1 m for very thin ice up to 2 m for ice greater than 4 m thick. The maximum uncertainty in the point measurements included in the clusters is 2 m. Clusters were required to have 500 or more point samples to be retained and some clusters have as many as 7000 points. The average is 1670 points. In the summary file the minimum, maximum, mean, and standard deviation is given for the snow depth, the uncertainty in the ice thickness, and the ice thickness. See the file headers. The mean uncertainty is not the uncertainty of the mean because we do not know how the errors are correlated, but it does give some information about the relative confidence in the sample estimates. If the errors were uncorrelated the uncertaity in the mean would be approximately 1/sqrt(nsamps) times the mean uncertainty. |
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2009-GrnlV2: 54309 point estimates, 55 50-km cluster averages 2010-GrnlV2: 260705 point estimates, 215 50-km clusters 2011-GrnlV2: 256103 point estimates, 152 50-km clusters 2012-GrnlV2: 289234 points estimates, 267 50-km clusters 2013-GrnlV2: 260693 points estimates, 244 50-km clusters |
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Operation IceBridge sea ice freeboard, snow depth, and thickness data products manual (version 2) NSIDC web site: http://nsidc.org/data/docs/daac/icebridge/idcsi4/index.html#data_description Kurtz, N. T., Farrell, S. L., Studinger, M., Galin, N., Harbeck, J. P., Lindsay, R., Onana, V. D., Panzer, B., and Sonntag, J. G., 2013: Sea ice thickness, freeboard, and snow depth products from Operation IceBridge airborne data, The Cryosphere, 7, 1035-1056, doi:10.5194/tc-7-1035-2013. |
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The 20-m point data for ice thickness is at the National Snow and Ice Data Center as well as all of the clibrated instrument data. |
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Kurtz, Nathan, Michael Studinger, Jeremy Harbeck, Vincent-De-Paul Onana, and Sinead Farrell. 2012, updated to current year. IceBridge Sea Ice Freeboard, Snow Depth, and Thickness, [list dates of data used]. Boulder, Colorado USA: NASA Distributed Active Archive Center at the National Snow and Ice Data Center. Digital media. http://nsidc.org/data/idcsi4.html
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2 April to 24 April, 2009 |
24 March to 20 April, 2010 |
16 March to 28 March, 2011 |
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14 March to 10 April, 2012 |
March 3 to April 24, 2013 |
All Samples |
Click on the maps for a bigger version
2 April to 24 April, 2009 |
24 March to 20 April, 2010 |
16 March to 28 March, 2011 |
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14 March to 10 April, 2012 |
March 3 to April 24, 2013 |
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Click on the plot for a bigger version.