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The Sea Ice Radar Altimetry (SIRAL) project of the Alfred Wegener Institute (AWI) is based on satellite radar altimetry data to investigate the sea ice mass balance and related processes to understand Arctic Change. The name of the project is also a homage to the radar altimeter onboard CryoSat-2, the Synthetic and Interferometric Radar Altimeter (SIRAL) which has been a game changer for sea-ice thickness information from satellite radar altimetry. The thickness information obtained from radar altimetry adds the third dimension to the sea ice concentration data record and is an essential parameter for climate research and numerical weather prediction.

This wiki is dedicated to the documentation of sea ice thickness data sets from radar altimeter data produced at the Alfred Wegener Institute. Please also check the blog for news and updates as well as the CS2SMOS wiki for information on merged CryoSat-2/SMOS sea ice thickness data.


News & Updates

Production of near-realtime CryoSat-2 data has been discontinued for the summer month (May - September) and will be resumed in November 2019 with an updated version (v2.2)

Processing of near-realtime and reprocessed CryoSat-2 data has been resumed. (Access Data Products)

The AWI CryoSat-2 sea ice product has been updated to version 2.1 in October 2018 for the entire CryoSat-2 data period (2010 - present). The previous version 2.0 is discontinued. See Whats new in version 2.1. Full documentation in the Product User Guide.

Documentation

Sea Ice Thickness from Satellite Radar Altimetry


Further Information


SIRAL Blog

The production of sea ice thickness from CryoSat-2 near real-time data has been resumed for the winter season 2023/24. Documentation of the new version 2.6 will be made available shortly on this page.  CryoSat-2-AWI-v2p6-nrt-20231001_20231003.pngFigure: CryoSat-2 NRT data from the first 3 days of October 2023
Operational production of CrypSat-2 near real time data has been completed for the 2022/23 Arctic winter season. Production will resume in October 2023. sea_ice_thickness_awi-cryosat2-nrt-nh_202304.pngFinal Arctic sea ice thickness grid (April 2023) from CryoSat-2 nea real-time data
Sea Ice Concentration data from OSI-SAF is (OSI-401-b) is currently not available due to missing DMSP SSMIS Level-1 input data: https://osi-saf.eumetsat.int/community/list-of-service-messages https://osi-saf.eumetsat.int/community/list-of-service-messages Daily sea ice concentration data from OSI-401-b is critical input to the CryoSat-2 sea ice product and data from the following dates is missing: CryoSat-2 l2p
The most recent version of the AWI CryoSat-2 sea ice product has been published on the AWI ftp: ftp://ftp.awi.de/sea_ice/product/cryosat2/v2p5/nh/ ftp://ftp.awi.de/sea_ice/product/cryosat2/v2p5/nh/ The data release includes a full mission reprocessing from November 2010 and April 2022 and operational processing (including near real-time) from October 2022 onwards. Reprocessed (33 days delay) Near-real time (2 days delay) Daily Trajectory l2p_trajectory ftp://ftp.awi.…
Production of the near real-time AWI CryoSat-2 sea ice thickness product will start shortly. Preliminary list of updates compared in v2.5: New surface type classification (sea ice / lead / open ocean discrimination). The new surface type classification increases the number of waveforms for sea ice freeboard/thickness evaluation. New flag indicating surface wave influence in the marginal ice zone.…

Older blog entries can be found here.



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