High concentrations and turnover rates of DMS, DMSP and DMSO in Antarctic sea ice
High concentrations and turnover rates of DMS, DMSP and DMSO in Antarctic sea ice
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DOI：
10.1029/2011gl049712
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发表时间：
2011-12-14
影响因子：
5.2
通讯作者：
Tortell, Philippe D.
中科院分区：
文献类型：
--
作者：
Asher, Elizabeth C.;Dacey, John W. H.;Tortell, Philippe D.
The vast Antarctic sea-ice zone (SIZ) is a potentially significant source of the climate-active gas dimethylsulfide (DMS), yet few data are available on the concentrations and turnover rates of DMS and the related compounds dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) in sea ice environments. Here we present new measurements characterizing the spatial variability of DMS, DMSP, and DMSO concentrations across the Antarctic SIZ, and results from tracer experiments quantifying the production rates of DMS from various sources. We observed extremely high concentrations (>200 nM) and turnover rates (>100 nM d(-1)) of DMS in sea-ice brines, indicating intense cycling of DMS/P/O. Our results demonstrate a previously unrecognized role for DMSO reduction as a major pathway of DMS production in Antarctic sea ice. Citation: Asher, E. C., J. W. H. Dacey, M. M. Mills, K. R. Arrigo, and P. D. Tortell (2011), High concentrations and turnover rates of DMS, DMSP and DMSO in Antarctic sea ice, Geophys. Res. Lett., 38, L23609, doi:10.1029/2011GL049712.
