期刊
MARINE CHEMISTRY
卷 115, 期 1-2, 页码 1-9出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.marchem.2009.04.007
关键词
Sea-surface microlayer; Surfactants; Transparent exopolymer particles; Dissolved carbohydrates; Santa Barbara Channel
资金
- Office of Naval Research (ONR) [000140710754]
- Deutsche Forschungsgemeinschaft (DFG) [WU 585/2-1]
Results from a study Of Surface-active substances (SAS) in the sea-surface microlayer (SML) of the Santa Barbara Channel suggest that the SML is stable enough to exist at typical oceanic wind conditions and that stratification plays an important role in SML formation through accumulation of surface-active organic matter above the pycnocline. We measured Surface-active substances, total dissolved carbohydrates (TDC), chromophoric dissolved organic matter (CDOM) and transparent exoploymer particles (TEPs) in the SML and the underlying bulk water. While the enrichment factors of those compounds, defined as the ratio of the concentration in the SML to that in the corresponding underlying water. were generally less than 3, significant enrichment in the microlayer persisted at wind speeds greater than 6 m s(-1) (up to 9.6 m s(-1), the highest winds observed), which is close to the average global wind speed over the ocean. Additional measurements from three water column profiles indicated that stratification of the water column led to an accumulation of surface active organic matter above the pycnocline. Carbohydrate-rich TEP correlated significantly with the density of the water column indicating an upward flux of these gel-like particles towards the SML (C) 2009 Elsevier B.V. All rights reserved.
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