The Multisensor Analyzed Sea Ice Extent - Northern Hemisphere (MASIE-NH) products provide measurements of daily sea ice extent and sea ice edge boundary for the Northern Hemisphere and 16 Arctic regions in a polar stereographic projection at both 1 km and 4 km grid cell sizes. MASIE products include an ASCII text file of sea ice extent values in square km for ... each Arctic region, time series plots, and image files that visually show where the sea ice is. The MASIE-NH imagery are provided at a gridded nominal 1 km and 4 km resolutions. The input data comes from the 1 km and 4 km Interactive Multisensor Snow and Ice Mapping System (IMS) snow and ice product produced by the National Ice Center (NIC). NIC utilizes visible imagery, passive microwave data, and NIC weekly analysis products to create their data product. The MASIE-NH products are distributed in a number of formats including ASCII text, GeoTIFF, PNG, shapefiles, and Google Earth files. The 4 km gridded data are available from 01 October 2006 to the present, and the 1 km gridded data are available from 02 December 2014 to the present. The most recent days worth of imagery plus the ASCII text data file are provided via the MASIE Web site. A complete archive of the imagery can be obtained via FTP. Note: MASIE may look like several other sea ice products distributed at NSIDC and elsewhere, but its source data and intended uses are different. If intended and appropriate uses of the data are not clear after reading the documentation, please contact NSIDC User Services.
Arctic Climatology Project. 2000. Environmental Working Group joint U.S.-Russian sea ice atlas. Edited by F. Tanis and V. Smolyanitsky. Ann Arbor, MI: Environmental Research Institute of Michigan in association with the National Snow and Ice Data Center. CD-ROM. Fetterer, F., compiler. 2006. A selection of documentation related to National Ice Center sea ice charts in digital format. NSIDC ... Special Report 13. Boulder, CO, USA: National Snow and Ice Data Center. Fetterer, F., K. Knowles, W. Meier, and M. Savoie. 2002, updated 2009. Sea Ice Index, Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Helfrich, S.R., D. McNamara, B.H. Ramsay, T. Baldwin, and T. Kasheta. 2007. Enhancements to, and forthcoming developments to the Interactive Multisensor Snow and Ice Mapping System (IMS), Hydrological Processes 21: 12, 1576-1586. McKenna, P., and W. N. Meier. 2002. SSM/I sea ice algorithm inter-comparison: Operational case studies from the National Ice Center, IGARSS Proceedings, INT_A32_04, Toronto, 24-28 June 2002. Meier, W. N, M. L. van Woert, and C. Bertoia. 2001. Evaluation of operational SSM/I ice concentration algorithms, Ann. Glaciology, 33, 102-108. Meier, Walter, 2005. Comparison of Passive Microwave Ice Concentration Algorithm Retrievals With AVHRR Imagery in Arctic Peripheral Seas. IEEE Transactions on Geoscience and Remote Sensing, Vol 40, No. 6, pp 1324-1334. Meier, W. N., F. Fetterer, C. Fowler, P. Clemente-Colón, T. Street, Operational sea ice charts: An integrated data product suitable for observing long-term changes in Arctic sea ice? Poster presented at the AGU Fall Meeting, 2006, and available on the NSIDC Posters and Presentations page. Meier, W. N., T. Maksym and M.L. Van Woert, Evaluation of Arctic operational passive microwave products: a case study in the Barents Sea during October 2001. Ice in the Environment: Proceedings of the 16th IAHR International Symposium on Ice, Dunedin, New Zealand, 2nd-6th December 2002, International Association of Hydraulic Engineering and Research National Ice Center. 2006. National Ice Center Arctic sea ice charts and climatologies in gridded format. Edited and compiled by F. Fetterer and C. Fowler. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Partington, K., T. Flynn, D. Lamb, C. Bertoia, and K. Dedrick., 2003. Late twentieth century Northern Hemisphere sea-ice record from U.S. National Ice Center ice charts, J. Geophys. Res., 108, C11, 3343, doi:10.1029/2002JC001623. Rayner, N. A., D. E. Parker, E. B. Horton, C. K. Folland, L.V. Alexander, D. P. Rowell, E. C. Kent, and A. Kaplan. 2003. Global analysis of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. Journal of Geophysical Research. 108 (D14). doi:10.1029/2002JD002670. Willis, Z. M, Foster, C. Bertoia, and K. Dedrick. 2000. National Ice Center/Naval Ice Center support to submarine operations Undersea Warfare: Issue 8, pp. 18-21.
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Update Frequency:updated daily
Version Summary:Initial release of the 4 km MASIE NH product.