Biogeochemistry of dimethylsulfide in a seasonally stratified coastal salt pond

Dimethylsulfide (DMS) is the major volatile reduced organic sulfur compound in the water column of coastal Salt Pond, Cape Cod, MA. DMS concentration and vertical distributions vary seasonally in response to changing biogeochemical processes in the pond. When the pond is thermally stratified in summer, maximum DMS concentrations of up to 60 nmol/1 were found in the oxygen-deficient metalimnion. DMS concentrations in the epilimnion (typically 5–10 nmol/1) were always an order of magnitude higher than in the hypolimnion (