# Upcoming release of version 2 of C3S Sea Ice Edge and Type dataset

**URL:** <https://forum.ecmwf.int/t/upcoming-release-of-version-2-of-c3s-sea-ice-edge-and-type-dataset/1346>\
**Category:** C3S - Announcements\
**Tags:** c3s, ecv\_ocean\
**Created:** [24 September 2021 12:48 UTC](https://forum.ecmwf.int/t/upcoming-release-of-version-2-of-c3s-sea-ice-edge-and-type-dataset/1346 "2021-09-24T12:48:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Julien\_Nicolas](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/j/41988e/32.png) [@Julien\_Nicolas](https://forum.ecmwf.int/u/Julien_Nicolas)\
**Post date:** [24 September 2021 12:48 UTC](https://forum.ecmwf.int/t/upcoming-release-of-version-2-of-c3s-sea-ice-edge-and-type-dataset/1346/1 "2021-09-24T12:48:46Z")

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We are happy to announce the upcoming release of a new version ( **version 2.0** ) of the following satellite-based Climate Data Record (CDR) in the Climate Data Store at the end of September 2021:

[Sea ice edge and type daily gridded data from 1979 to present derived from satellite observations](https://cds.climate.copernicus.eu/cdsapp#!/dataset/satellite-sea-ice-edge-type)

This pre-release annoucement is meant to help current users of version 1.0 of the dataset prepare for this change as the **production of version 1.0 will end in early October 2021**.

The new version will include the following **improvements** :

- Use of the ERA5 Reanalysis as auxiliary data for atmospheric correction in the CDR
- Improved temperature-based correction scheme for sea ice classification in warm conditions
- Level-4 product (instead of Level-3 for version 1.0)
- Start of the CDR in October 1978 (instead of January 1979 for version 1.0)