Assessing the flux of different volatile sulfur gases from the ocean to the atmosphere
Assessing the flux of different volatile sulfur gases from the ocean to the atmosphere
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DOI：
10.1029/2000jd900630
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发表时间：
2001-06-16
影响因子：
4.4
通讯作者：
Andreae, MO
中科院分区：
文献类型：
--
作者：
Kettle, AJ;Rhee, TS;Andreae, MO
1998年，在詹姆斯·克拉克·罗斯号从英格兰到福克兰群岛的大西洋经向断面航行期间，在上层海洋测量了还原硫气体和光学特性。在低纬度海域，羰基硫（COS）的浓度呈现明显的昼夜变化，但在中高纬度海域，COS的浓度没有昼夜循环，这可能是由于海洋锋面和冷水中较长的水解时间常数的影响。在沿海和上升流区观测到最高的COS浓度。CS2浓度的变化小于COS的，最高浓度被发现在北非上升流区与浓度下降的北部和南部的这一最大值。二甲基硫（DMS）在上层海洋中的浓度最高，但甲基硫（CH 3SH）是一些沿海和上升流区的重要还原硫物种。这可能与高细菌生长率有关。有色溶解有机物（CDOM）的荧光和吸光度也表现出最高的值在沿海和上升流区和南亚热带环流的最低值。结果表明，二硫化碳（CS2）从海洋中释放出来，并在大气中氧化可能代表一个更大的来源COS比COS通过海-气界面的直接通量。
Reduced sulfur gases and optical properties were measured in the upper ocean during an Atlantic Meridional Transect cruise of the RRS James Clark Ross from England to the Falkland Islands in 1998. Sea surface concentrations of carbonyl sulfide (COS) exhibited a pronounced diel variation at low latitudes but no diel cycle at mid and high latitudes possibly because of oceanic fronts and the longer hydrolysis time constant in cold water. The highest COS concentrations were observed in coastal and upwelling areas. CS2 concentrations varied less than those of COS, and the highest concentrations were found in the North African upwelling area with decreasing concentrations both northward and southward of this maximum. Dimethylsulfide (DMS) had the largest concentrations in the upper ocean, but methyl mercaptan (CH3SH) was an important reduced sulfur species in some coastal and upwelling areas. This may be associated with high bacterial growth rates. Colored dissolved organic matter (CDOM) fluorescence and absorbance also exhibit the highest values in coastal and upwelling areas and the lowest values in the southern subtropical gyre. The results suggest that carbon disulfide (CS2) outgassed from the oceans and oxidized in the atmosphere may represent a larger source of COS to the atmosphere than the direct flux of COS across the sea-air interface.