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.…
The release of the baseline-E of CryoSat-2 L1b data (See ESA announcement https://earth.esa.int/eogateway/news/new-ice-baseline-e-and-near-real-time-processors) has provided a fix to missing orbits in the near real-time NRT data (See CryoSat-2 NRT issues remain for a description). The orbit coverage of the CryoSat-2 v2.4 NRT data from October 2021 and later has again the same coverage as the following reprocessed data.
sea_ice_thickness_in_awi-siral-l3c-sithick-cryosat2-nrt-nh_25km.png
Gridded sea-ice thickness from near-real time CryoSat-2 data in October ftp://ftp.awi.de/sea_ice/product/cryosat2/v2p3/nh/l3c_grid/monthly/LATEST/awi-siral-l3c-sithick-cryosat2-nrt-nh_25km_ease2-202010-fv2p3.nc displays a few orbits with large thickness values in the Russian Arctic (see figure below). These are the result of an anomaly in the processing chain/input data and are under investigation.…
The production of operational sea-ice thickness information from near real-time CryoSat-2 data has resumed:
Near-real time (2 days delay)
Daily Trajectory
l2p_trajectory/Latest ftp://ftp.awi.de/sea_ice/product/cryosat2/v2p3/nh/l2p_trajectory/Latest (updated daily)
Weekly Gridded
l3c_grid/weekly/Latest ftp://ftp.awi.de/sea_ice/product/cryosat2/v2p3/nh/l3c_grid/weekly/Latest (updated on Tuesday)
Monthly Gridded
l3c_grid/monthly/Latest ftp://ftp.awi.…
The start of the AWI CryoSat-2 v2.3 near real-time processing is delayed due to ongoing work on a software issue.
Algorithm Updates
The AWI CryoSat-2 sea-ice product is updated annually and the new version is reprocessed every year in fall and operationally generated from October on. The product version from October 2020 on is v2.3 and it contains the following changes compared to v2.2:
Auxiliary Data
Switched C3S sea-ice concentration (interim) climate data record from v1.2 to v2.…
The Copernicus Climate Change Services (C3S) interim climate data (ICDR) record for sea-ice concentration has been discontinued in anticipation of a version update from January 1st, 2020 onwards. This affects the production the CryoSat-2 sea-ice thickness data product with the reprocessed timeliness (+31 days).…