Articles | Volume 8, issue 6
https://doi.org/10.5194/tc-8-2409-2014
https://doi.org/10.5194/tc-8-2409-2014
Research article
 | 
23 Dec 2014
Research article |  | 23 Dec 2014

Ice and AIS: ship speed data and sea ice forecasts in the Baltic Sea

U. Löptien and L. Axell

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Short summary
The Baltic Sea is a seasonally ice-covered marginal sea in central northern Europe. In wintertime, on-time shipping depends crucially on sea ice forecasts. Among the forecasting tools heavily applied are numerical models, which suffer from a lack of calibration data because relevant ice properties are difficult (and costly) to monitor. We developed an innovative and inexpensive approach, by using ship speed observations obtained by the automatic identification system (AIS) to asses such models.