Extension of CCI sea ice climate time series with historical satellite data

Poster presented at the 11th International Workshop on Sea Ice Modelling, Assimilation, Observations, Predictions and Verification of the International Ice Charting Working Group (IICWG) at the Norwegian Meteorological Institute in Oslo, 21-23 March 2023. The effects of global climate change are amplified in the arctic, making arctic sea ice an important climate indicator. Current sea ice climate data records (CDRs), based on satellite data, are beginning in the late 1970’s. However, there are also satellite missions from the early and mid 1970s which can be used for mapping sea ice and for extending the current CDRs. One example is the data of the Electrically Scanning Microwave Radiometer (ESMR) on board the NIMBUS 5 satellite, which was operating between 1972 and 1977. As part of the ESA CCI+ sea ice project a new sea ice concentration (SIC) data set was created from the ESMR L1 data and is presented here.