In an effort to quantify uncertainties in sea ice concentration (SIC) and sea ice thickness (SIT) and to select the most suitable approach to generate long time-series as required by climate models, ESA as initiated the so-called Climate Change Initiative: ESA-CCI project. Under the umbrella of this project a number of essential climate variables (ECV) are going to be re-processed and quality assessed. One of these ECVs is sea ice. The ESA-CCI Sea-Ice-ECV project - now in phase 2 - is managed at NERSC, Norway.
The ESA-CCI Sea-Ice-ECV project will provide two data sets: the sea ice concentration (SIC) and the sea ice thickness (SIT). For both parameters, the optimal retrieval algorithm shall be sought, tested and the results validated. ICDC is responsible, e.g., for the quality assessment and validation of the ECV prototype products for SIC and SIT.
In contrast to phase 1 in phase 2 SIC data from two different hybrid algorithms are offered. One uses the 18.7 and 36.5 GHz channels of the AMSR sensors while the other one is based on data of the 6.9 and 36.5 GHz channels. The products differ in terms of grid resolution (25 km and 50 km) and quality.
The following links allow to access SIC (from phase 2) and Antarctic SIT (from phase 1) prototype products as well as snow depth on sea ice (as listed below); new SIT data sets are currently under evaluation. CliSAP/KlimaCampus members owning a CEN/MPI account find the data in the folder: /data/icdc/ice_and_snow/esa_cci_sicci/CRDP2_SIC/ and in the folder /data/icdc/ice_and_snow/esa_cci_sicci/ANT_SIT/
NEWS from April 19 2017: The missing data (see news from April 13) have been included in our data base.
NEWS from April 13 2017: The AMSR2 data time series may have large data gaps - particularly in the period December 2013 through February 2014. We will work on this issue the week after Easter.
NEWS from March 10 2017:
From now on we provide access to the ESA SICCI phase 2 sea-ice concentration data set based on AMSR-E (06-2002 through 09-2011) and AMSR2 (07-2012 through 12-2015).
From now on we do not offer the SSM/I based sea-ice concentration data set from phase 1. This will be super-seeded soon by the SMMR-SSM/I-SSMIS sea-ice concentration CDR from Eumetsat - OSI SAF OSI-450.
Contribution of the EUMETSAT OSI SAF to the production of the SICCI SIC dataset is acknowledged. EUMETSAT OSI SAF provided access and allowed re-use of its SIC reprocessing software and data hosting facilities. The reprocessing chain was further updated with the new algorithms and knowledge from the ESA CCI Sea Ice project.
The data are free to use but we ask users to register themselves so that we know who is using the data. The registration form opens when clicking on the above links to the data.
A user workshop was held dedicated to presentation and discussion of the quality and usefulness of the phase 1 prototype products on September 18-19 2014 in Hamburg (see CliC Workshop website and Hamburg-Sea-Ice-Workshop-Sep2014-Presentations
On October 9-11 2017 Hamburg will host another workshop closely related to improved sea ice data sets: "Workshop on Improved satellite retrievals of sea-ice concentration and sea-ice thickness for climate applications" (see the invitation / preliminary agenda).