Gas exchange dependency on diffusion coefficient: Direct 222Rn and 3He comparisons in a small lake
Gas exchange dependency on diffusion coefficient: Direct 222Rn and 3He comparisons in a small lake
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气体交换对扩散系数的依赖性：小湖中 222Rn 和 3He 的直接比较
DOI：
10.1029/jc087ic01p00546
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
W. Broecker
中科院分区：
文献类型：
--
作者：
T. Torgersen;G. Mathieu;R. Hesslein;W. Broecker
通过直接场比较，确定了气体交换系数（k/sub x/）与扩散系数（D/sub x/）的关系。该研究还试图证实沼泽围栏和类似围栏增强的垂直交换特性。在安大略省北部的一个小湖泊中，使用/sup 226/Ra和/sup 3/H峰值确定了/sup 222/Rn和/sup 3/He的气体交换系数，以获得必要的精度。结果表明，气体交换系数在功能上依赖于上升到1.22/sub -35/ sup + bbb12 / power （k/sub x/ = f(D/sub x//sup 1.22)）的扩散系数，明显支持气体交换停滞膜模型。尽管观察到湖底比开阔的湖面更平静，但湖底围栏的气体交换率却高达整个湖泊的1.7倍。33个参考文献，6个数字，8个表格。
A direct field comparison was conducted to determine the dependency of gas exchange coefficient (k/sub x/) on the diffusion coefficient (D/sub x/). The study also sought to confirm the enhanced vertical exchange properties of limnocorrals and similar enclosures. Gas exchange coefficients for /sup 222/Rn and /sup 3/He were determined in a small northern Ontario lake, using a /sup 226/Ra and /sup 3/H spike to gain the necessary precision. The results indicate that the gas exchange coefficient is functionally dependent on the diffusion coefficient raised to the 1.22/sub -35//sup + > 12/ power (k/sub x/ = f(D/sub x//sup 1.22)), clearly supporting the stagnant film model of gas exchange. Limnocorrals were found to have gas exchange rates up to 1.7 times higher than the whole lake in spite of the observation of more calm surface conditions in the corral than in the open lake. 33 references, 6 figures, 8 tables.