INFLUENCE OF THE SURFACE MICROLAYER ON THE FLUX OF NONCONSERVATIVE TRACE GASES (CO, H-2, CH4, N2O) ACROSS THE OCEAN-ATMOSPHERE INTERFACE
INFLUENCE OF THE SURFACE MICROLAYER ON THE FLUX OF NONCONSERVATIVE TRACE GASES (CO, H-2, CH4, N2O) ACROSS THE OCEAN-ATMOSPHERE INTERFACE
复制标题
DOI：
10.1007/bf00048333
复制
发表时间：
1988-01-01
影响因子：
2
通讯作者：
SEILER, W
中科院分区：
文献类型：
--
作者：
CONRAD, R;SEILER, W
在与FSMeetor的一次船舶考察期间，使用一个小橡皮筏在热带大西洋进行了气体交换实验。通过测量浮箱顶空中CO、H2、CH 4和N2 O的混合比和水相中这些气体的浓度随时间的变化，确定了它们在海-气界面上的传输速度。当水相对于顶部空间中的混合比不饱和时，海洋充当这些气体的汇。的传输速度是不同的个别气体，并表现出仍然很大的差异，即使当归一化的扩散率。应用层流膜模型，膜厚度为20至70 μm的不同气体种类的观测流量率计算。当水相对于大气CO，H2，CH 4和N2 O过饱和时，排放过程的传输速度小于沉积过程中确定的传输速度。在H2和CH 4的情况下，排放量甚至无法计算，尽管根据观测到的梯度，层流膜模型预测了海气界面的显著通量。解释的破坏过程中活跃的表面微层的结果。
Gas exchange experiments were conducted in the tropical Atlantic Ocean during a ship expedition with FSMeteorusing a small rubber raft. The temporal change of the mixing ratios of CO, H2, CH4and N2O in the headspace of a floating glass box and the concentrations of these gases in the water phase were measured to determine their transfer velocities across the ocean-atmosphere interface. The ocean acted as a sink for these gases when the water was undersaturated with respect to the mixing ratio in the headspace. The transfer velocities were different for the individual gases and showed still large differences even when normalized for diffusivity. Applying the laminar film model, film thicknesses of 20 to 70 μm were calculated for the observed flux rates of the different gas species. When the water was supersaturated with respect to atmospheric CO, H2, CH4and N2O, the transfer velocities of the emission process were smaller than those determined for the deposition process. In case of H2and CH4, emission was even not calculable although, based on the observed gradient, the laminar film model predicted significant fluxes at the air-sea interface. The results are interpreted by destruction processes active within the surface microlayer.