2026-07-15T03:51:56Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-0747.0012026-04-20T20:16:13Zv0_daacv0_allretirednasa_nsidc_daac
NSIDC-0747.001Arctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite DataSteele, M., Bliss, A. C., Peng, G., Meier, W. N. & Dickinson, S.Arctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite Data2019-02-20Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/KINANQKEZI4Thttps://nsidc.org/sites/default/files/nsidc-0747-v001-userguide.pdfNSIDC-0747Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHERESNOW/ICEICE GROWTH/MELT EARTH SCIENCECRYOSPHERESEA ICESEA ICE CONCENTRATION SMMR and SSM/I-SSMIS-projectsmmr-ssmi-projectSMMRScanning Multichannel Microwave RadiometerSSM/ISpecial Sensor Microwave/ImagerSSMISSpecial Sensor Microwave Imager/SounderDMSP 5D-2/F11Defense Meteorological Satellite Program-F11DMSP 5D-2/F13Defense Meteorological Satellite Program-F13DMSP 5D-2/F8Defense Meteorological Satellite Program-F8DMSP 5D-3/F17Defense Meteorological Satellite Program-F17DMSP 5D-3/F18Defense Meteorological Satellite Program-F18Nimbus-7Nimbus-71979-03-012018-02-28deprecated3090-180180GEOGRAPHIC REGIONNORTHERN HEMISPHERE25 km25 k m1 yearThese data have been retired and are no longer accessible, though a more recent version of these data may be available.These data have been retired and are no longer available for use, though a more recent version of these data may be available. Cite any prior or planned use of these data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.EnglishUWA/APL/PSCNASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAHTTPSNetCDFSteele, M., S. Dickinson, J. Zhang, and R. Lindsay (2015), Seasonal ice loss in the Beaufort Sea: Toward synchrony and prediction, J. Geophys. Res. Oceans,120,
doi:10.1002/2014JC010247.
Peng, G., M. Steele, A. Bliss, W. Meier, S. Dickinson. Temporal Means and Variability of Arctic Sea Ice Climate Indicators Using a Satellite Climate Data Record. In preparation (planned submission in June 2018).
Bliss et al. Regional Variability and Trends in Arctic Sea Ice Summer Melt Season Climate Indicators. In preparation (planned submission in June 2018).
Meier, W.N., G. Peng, D.J. Scott, M.H. Savoie, 2014. Verification of a new NOAA/NSIDC passive microwave sea-ice concentration climate record, Polar Research, 33, doi:/10.3402/polar.v33.21004.
Peng, G., W.N. Meier, D.J. Scott, and M.H. Savoie, 2013. A long-term and reproducible passive microwave sea ice concentration data record for climate studies and monitoring, Earth Sys. Sci. Data, 5, 311-318, doi:10.5194/essd-5-311-2013.
Markus, T., J. C. Stroeve, and J. Miller (2009), Recent changes in Arctic sea ice melt onset, freezeup, and melt season length, J. Geophys. Res., 114, C12024, doi:10.1029/2009JC005436.
Drobot, S. D. and M. R. Anderson. 2001a. An improved method for determining snowmelt onset dates over Arctic sea ice using scanning multichannel microwave radiometer and Special Sensor Microwave/Imager data. Journal of Geophysical Research 106: 24,033-24,049.
Bliss, A.C., J.A. Miller, and W.N. Meier, 2017. Comparison of passive microwave-derived early melt onset records on Arctic sea ice, Remote Sensing, 9, 199, doi:10.3390/rs9030199.
Bliss, A.C., and M.R. Anderson, 2014. Daily Area of Snow Melt Onset on Arctic Sea Ice from Passive Microwave Satellite Observations 1979–2012, Remote Sens. 2014, 6(11), 11283-11314; doi:10.3390/rs61111283.
The product contains melt-season indicators that can be used to delineate various stages in the summer melt and freeze-up period of sea ice. The data were primarily derived using Sea Ice Concentration (SIC) observations from the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration and brightness temperature observations from the DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures; both input data sets are archived at NSIDC. The main parameters for this data set include the dates of melt onset, early melt onset, and continuous melt onset; dates of early and continuous freeze onset; day of opening (last day SIC is above 80%); day of retreat (last day SIC drops below 15%); day of advance (first day SIC increases above 15%); day of closing (first day SIC increases above 80%); total outer ice-free period; total inner ice-free period; seasonal loss-of-ice period; seasonal gain-of-ice period; and the seasonal ice zone.
These data are available for 1979 through 2017. They are gridded on the NSIDC northern hemisphere polar stereographic grid at 25 km.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/nsidc-0747-v001-userguide.pdfArctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite Data, Version 1 User GuideCEOS IDN DIFVERSION 9.92019-02-202026-04-20NSIDCVersion SummaryInitial ReleaseNSIDCMinor Version1The data record was updated through 2017.
The full data record was also reprocessed to correct an error in the CFO field. In the previous version, the CFO field was written with a copy of the EFO field.
Some geophysical data fields (e.g. year) were updated in the netCDF file to better reflect common netCDF practices (e.g. the year field is now labeled as time).1979-03-012018-02-281NSIDCSpatial Reference SystemsEPSG:3411NSIDC Sea Ice Polar Stereographic NorthNSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationSteele, M., Bliss, A. C., Peng, G., Meier, W. N. & Dickinson, S. (2019). <i>Arctic Sea Ice Seasonal Change and Melt/Freeze Climate Indicators from Satellite Data</i>. (NSIDC-0747, Version 1). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/KINANQKEZI4T">https://doi.org/10.5067/KINANQKEZI4T</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredtrue