The Sea Ice Concentration Climate Data Record (CDR) provides a consistent, daily and monthly time series of sea ice concentrations for both the north and south Polar Regions on a 25 km x 25 km grid from 1978 - present. These data can be used to estimate how much of the ocean surface is covered by ice, and monitor changes in sea ice concentration.
The CDR combines concentration estimates using two algorithms developed at the NASA Goddard Space Flight Center (GSFC). Gridded brightness temperatures acquired from a number of Defense Meteorological Satellite Program (DMSP) passive microwave radiometers provide the necessary input to produce the dataset.
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Florence Fetterer, NSIDC
Cite dataset when used as a source. See the dataset's landing page for citation details at doi: 10.7265/efmz-2t65.