Past and present carbon accumulation in undis- turbed boreal and subarctic mires: a review

This review integrates the results from several recent studies on carbon (C) accumula-tion in undisturbed boreal and subarctic mire ecosystems in Finland, Sweden, Russia,Canada, and USA. Generally, a large variation in the average long-term apparent rateof carbon accumulation (LORCA) has been found among mires based on the miretype, age and geographical location. The differences in LORCA between the raised bogregion and the aapa mire regions were found to be significant. The updated LORCA forundrained boreal and subarctic mire regions has been estimated at 13–20 g C m