Gas exchange rates in the tidal Hudson river using a dual tracer technique
Gas exchange rates in the tidal Hudson river using a dual tracer technique
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使用双示踪技术测定潮汐哈德逊河的气体交换率
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
H. J. Simpson
中科院分区：
文献类型：
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作者：
Jordan F. Clark;R. Wanninkhof;P. Schlosser;H. J. Simpson
通过注入惰性气体3 He和六氟化硫（SF 6）并监测其随时间的衰减，测定了哈德逊河潮汐流中的气体交换率。它们沿河流主轴的分布沿着近似为高斯分布，在16天的时间里，在每个样带观测到的过量3 He和SF6的最大浓度分别从约6500 × 10 - 16 cm 3STP g-1和250 ppt（万亿分之一体积）下降到接近大气平衡浓度的值。在整个实验过程中，示踪剂浓度的垂直梯度进行了观察。经过3天的混合后，底部样品中的示踪剂浓度比表面样品高0-19%。气体传输速度计算的时间变化的深度平均超过3 He/SF6比从站具有最大的示踪剂浓度。它们的范围从1.5到9.0厘米h-1和相关性以及与平均风速。DOI：10.1034/j.1600-0889.1994.t01-2-00003.x
Gas exchange rates have been determined in the tidal Hudson River by injecting 2 inert gases, 3 He and sulfur hexafluoride (SF 6 ) and monitoring their decline with time. Their distributions along the main axis of the river were approximately gaussian and maximum concentrations of excess 3 He and SF 6 observed during each transect decreased from about 6500 × 10 -16 cm 3 STP g -1 and 250 ppt (part per trillion by volume), respectively, to values close to atmospheric equilibrium concentrations over a period of 16 days. Throughout the experiment, vertical gradients in tracer concentration were observed. After 3 days of mixing, tracer concentrations in bottom samples were 0–19% greater than in surface samples. Gas transfer velocities were calculated from the temporal change in the depth averaged excess 3 He/SF 6 ratio from stations having maximum tracer concentrations. They ranged from 1.5 to 9.0 cm h -1 and correlated well with mean wind speed. DOI: 10.1034/j.1600-0889.1994.t01-2-00003.x