This is the second version, the OSI-450, a new full reprocessing of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF) team Sea-Ice Concentration (SIC) Climate Data Record (CDR). The release provides a SIC CDR over the polar regions, derived from passive microwave satellite data of SMMR, SSM/I and SSMIS, covering years 1979 to 2015. The corresponding Interim CDR (ICDR) OSI-430-b extending this data set to dtoady minus 16 days is available here: http://osisaf.met.no/p/ice/ice_conc_cdr_v2.html.
The basic principles and methodologies that were the backbone of our previous CDR (OSI-409) are still featured in OSI-450 (e.g. atmospheric correction of brightness temperature with NWP re-analysis data, state of the art algorithms, dynamic tie-points, uncertainties, etc...). They were nevertheless all revisited for this new release, through dedicated R&D in the OSI SAF project and in the ESA Climate Change Initiative (http://cci.esa.int) Sea Ice projects (see also the SICCI-webpage at ICDC), whose contribution is acknowledged. Key improvements embedded in OSI-450 are more accurate and stable algorithms, open water filters to limit false ice detection over the ocean, and more realistic uncertainty estimates.
The Algorithm Theoretical Basis Document (ATBD), the Product User Manual and the Validation Report give details about the sea-ice concentration retrieval, additional filters, optimization procedures, and the error estimation as well as some aspects about the validation.
Last update of data set at ICDC: June 1, 2017