Methane in the northern Atlantic controlled by microbial oxidation and atmospheric history
Methane in the northern Atlantic controlled by microbial oxidation and atmospheric history
复制标题
北大西洋的甲烷受微生物氧化和大气历史控制
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Rhein
中科院分区：
文献类型：
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作者：
G. Rehder;R. Keir;E. Suess;M. Rhein
1997年5 ~ 8月，在大西洋50° ~ 60°N海域进行了溶解甲烷和CCl 3F（CFC 11）浓度分布的观测。在整个区域的表层沃茨中，观测到甲烷与大气混合比接近平衡，这意味着表层海洋甲烷正在北大西洋深水形成区域追踪其大气历史。尽管CH 4和CFC 11的大气历史和海洋化学性质不同，但它们在水柱中的空间分布模式非常相似。一维分布已经用大气历史强迫的平流扩散模型进行了模拟。结果表明，类似的模式的结果从增加输入的CH 4和CFC 11新形成的深沃茨随着时间的推移，结合水平混合和甲烷的氧化的影响，在50年的时间尺度。
During May ‐ August, 1997, the distributions of dissolved methane and CCl3F (CFC11) were measured in the Atlantic between 50° and 60°N. In surface waters throughout the region, methane was observed to be close to equilibrium with the atmospheric mixing ratio, implying that surface ocean methane is tracking its atmospheric history in regions of North Atlantic Deep Water formation. Despite the different atmospheric history and ocean chemistry of CH4 and CFC11, their spatial distribution patterns in the water column are remarkably similar. One‐dimensional distributions have been simulated with an advection‐diffusion model forced by the atmospheric histories. The results suggest that the similar patterns result from the increasing input of CH4 and CFC11 to newly formed deep waters over time, combined with the effect of horizontal mixing and the oxidation of methane on a 50 year time scale.