The Finnish Meteorological Institute has made using the Ship Traffic Emission Assessment Model (STEAM) a theoretical estimate of the effect of sea ice on fuel consumption and carbon intensity of shipping in the Baltic Sea area in 2009 - 2019. Chapter 2 gives estimates on the annual total number of ships sailing in ice conditions in the Baltic Sea area, the distance sailed in ice conditions and additional fuel consumed in ice conditions for years 2009 - 2019. In chapter 3, the impact of sea ice on the annual carbon intensity of ships, which had sailed in ice conditions in 2009 - 2019, was analyzed by comparing the carbon intensity of shipping in open water with the carbon intensity in ice conditions. Finally, in chapter 4, the impact of sea ice on the total annual fuel consumption of all ships that have sailed in the Baltic Sea area in 2009 - 2019 was also analyzed including also e.g. ships having sailed only in open water.