Abstract
Freshwater peatlands are distributed world-wide, from boreal regions to the tropics. Their total area has been estimated as 5.2 x 106 km 2. Peatland deposits have been identified as net sinks for atmospheric sulphur (Howarth et al., 1992). However, the question of whether or not the storage of sulphur in peat is permanent has rarely been addressed. We studied early diagenesis of sulphur in 9 freshwater peat bogs using annual S accumulation rates and vertical changes in S isotope composition. Despite site differences in atmospheric S inputs, we found similar vertical patterns in S accumulation rates and 8~S values, respectively, in 7 bogs indicating a high degree of openness toward buried S.
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