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Background and Purpose: The concentrations of greenhouse gases in the atmosphere have been increasing over the last hundred years in relation to the Fourth IPCC assessment report that highlighted human activities as a direct influence on climate changes. Since Croatia and Finland signed the Kyoto Protocol, they are both committed to fulfil international obligations of lowering GHG’s emissions, enhancing the storage, as well as protecting and enhancing the current pools where the forestry sector has a prominent role. These obligations created a need for a review on carbon storage potentials for both countries with the aim of setting further scientific and management guidelines as the basic purpose of this research. Materials and Methods: Data collection was conducted within the scope of the Sort Term Scientific Mission (STSM) in the period from May 2 – July 22, 2009 in the Finnish Forest Research Institute in Joensuu. The research encompassed an overview of literature, personal contacts with scientists and experts from both countries (research institutes, ministries, the EFI branch office in Joensuu) and a field inspection which altogether provided an insight into the applied silvicultural and utilization activities. A significant data source were official documents and published project results on the carbon storage potential. Results and Discussion: Mitigation activities within the framework of the LULUCF project reduced the total emissions for 33.4 millions tons of CO2 equivalents in Finland in 2006 (this data has varied from 18 to 33.4 millions tons CO2 equivalents in the last fifteen years) while for Croatia the availability of such data is limited. Finland has some former agricultural land which may be afforested but not in the substantial share, while in Croatia such areas amount to around 1 million ha. According to the climate change scenario for Finland (FINADAPT), predicting the largest climate changes, the total forest growth nationwide is estimated to increase by 44% which will have positive Martina Tijardovic Croatian Forest Research Institute Jastrebarsko, Croatia martinat@sumins.hr Sanja Peric Croatian Forest Research Institute Jastrebarsko, Croatia impact on the forest carbon storage in the future. In Croatia there is no such kind of research. There is about 12.6 % of all forest land in Finland under protected forests (strictly protected areas about 3.6 %) in which enhancement of carbon storage potential may be enhanced. About 21% of the forests in Croatia (513 155 ha) are forests in some degradation stage in addition to about 500 ha of forests where management is prevented because of the land mines. These areas present a potential for carbon storage enhancement. Forest fires pose a great threat to carbon pools especially in the Croatian karst areas where the total of 251 901 ha of the Croatian land area burned in the period 1992-2007, which in average amounts to 15 744 ha annually. Nevertheless, Finland and Croatia do not undertake any significant current deforestation activities. Conclusions: Even though Croatia and Finland have the same goals, they also show significant differences in relation to the already finished, current and planned scientific activities, legislation, implementation, natural conditions and constrains of CO2 sequestration and storage. It is estimated that a significant potential in Finland lies in the reduction of CO2 emissions through substitution effects, protection of stored carbon pools in forest ecosystems, avoiding the changes in land use, etc. Croatia, on the other hand, has a significant potential through afforestation activities on uncovered forest and abandoned agricultural lands. Further research on the categorisation of land, appropriate species and provenances selection is necessary. The effects of individual measures on emission reduction and carbon balance by forests are small on the national, as well as on the European scale, but if combined together the overall effects present a great potential to fulfill international obligations in both countries.

Carbon Storage Potential of Forest Land: A Comparative Study of Cases in Finland and Croatia