The CDR and ICDR sea ice concentration dataset of the EUMETSAT OSI SAF (OSI-450-a and OSI-430-a), covering the period from October 1978 to present, with 16 days delay. It used passive microwave data from SMMR, SSM/I and SSMIS. Sea ice concentration is computed from atmospherically corrected PMW brightness temperatures, using a combination of state-of-the-art algorithms and dynamic tie points. It includes error bars for each grid cell (uncertainties). This version 3.0 of the CDR (OSI-450-a, 1978-2020) and ICDR (OSI-430-a, 2021-present with 16 days latency) was released in November 2022

**DOI (product):**   
https://doi.org/10.48670/moi-00136

**References:**

* [http://osisaf.met.no/docs/osisaf_cdop2_ss2_pum_sea-ice-conc-reproc_v2p2.pdf]


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An ARCO version of this dataset with a small chunk size in the spatial dimensions.
    
Note that the link (`href`) associated to this asset is the base directory
of this dataset, but it cannot be accessed directly.

To download this dataset or part of it, 
use a library such as [xarray](https://docs.xarray.dev/).

Geo-chunked dataset in Zarr

The original, non-ARCO version of this dataset, as published by the data provider.

Native dataset

An ARCO version of this dataset with a small chunk size in the temporal dimension.
    
Note that the link (`href`) associated to this asset is the base directory
of this dataset, but it cannot be accessed directly.

To download this dataset or part of it, 
use a library such as [xarray](https://docs.xarray.dev/).

Time-chunked dataset in Zarr

Georeferenced map tiles using the OGC WMTS standard.

OGC Web Map Tile Service (WMTS)

This Interim Climate Data Record implements an extension of the OSI-450-a OSI SAF SIC CDR (doi:10.15770/EUM_SAF_OSI_0013). It is obtained from coarse resolution passive microwave satellite data (SSMIS) over the polar regions (Arctic and Antarctic). The processing chain features: 1) dynamic tuning of tie-points and algorithms, 2) correction of atmospheric noise using a Radiative Transfer Model, 3) computation of per-pixel uncertainties, and 4) an optimal hybrid sea ice concentration algorithm. This dataset was generated by the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF). The ESA CCI Programme contributed with Research and Development on the algorithms.

Global Ocean Sea Ice Concentration Time Series REPROCESSED (OSI-SAF)

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