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| 2009 | 2008 |
14 April 2009
Data are now available through June 2008 for the DMSP SSM/I Daily and Monthly Polar Gridded Sea Ice Concentrations data set. The Special Sensor Microwave Imager (SSM/I) derived ice concentrations are daily total and monthly-averaged ice fractions for both hemispheres with a temporal coverage record now spanning from June 1987 to June 2008.
18 February 2009
On 16 February 2009, NSIDC noticed significant problems with the Near-Real-Time (NRT) sea ice product. Upon investigation, the problem was found to be due to an issue with the DMSP F15 SSM/I 22 GHz frequency brightness temperature fields used as inputs into the sea ice algorithm. The problem began around 1 January 2009 and gradually worsened until it became noticeable in the sea ice product. NSIDC is working to correct the issue and provide reliable NRT sea ice data. In the meantime, F15 data since 1 January 2009 should not be used. The data sets affected by this problem are the following: The Sea Ice Index, Near-Real-Time DMSP SSM/I Daily Polar Gridded Brightness Temperatures, and Near-Real-Time DMSP SSM/I Daily Polar Gridded Sea Ice Concentrations.
13 November 2008
NSIDC has recently updated the Northern Hemisphere TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters data set. The data now span July 1979 to December 2005. Additional changes to the Northern and Southern TOVS data include a new file naming convention and a new FTP directory structure. Data set documentation and FTP access are available from the data set Web page. If you have any questions, please contact NSIDC User Services.
14 October 2008
NSIDC is pleased to announce that the DMSP SSM/I Daily Polar Gridded Brightness Temperatures data set has been updated through June 2008. Data set documentation and FTP data access are available from the data set documentation. If you have any questions, please contact NSIDC User Services.
29 September 2008
NSIDC is pleased to announce a recent update to the Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I data set. The daily and monthly data have been updated and now span 26 October 1978 through 31 December 2007 for the northern and southern hemispheres.
For additional information on this data set or to access the data, please see the data set documentation.
20 June 2008
NSIDC has recently updated the Sea Ice Trends and Climatologies from SMMR and SSM/I data products. These value-added products are now only derived from the Goddard Space Flight Center (GSFC) sea ice data sets: the NASA Team Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave data set and the Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I data set. The NASA Team sea ice data now span 1979 – 2007, and the Bootstrap sea ice data now span 1979 – 2006.
For additional information on the sea ice trends and climatologies, please see the Sea Ice Trends and Climatologies from SMMR and SSM/I product Web site.
If you have any questions, please contact NSIDC User Services.
09 June 2008
Data are now available through December 2007 for the Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave data set.
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