Relationship between gas exchange, wind speed, and radar backscatter in a large wind‐wave tank
Relationship between gas exchange, wind speed, and radar backscatter in a large wind‐wave tank
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大型风波池中气体交换、风速和雷达后向散射的关系
DOI：
10.1029/90jc02368
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
L. Bliven
中科院分区：
文献类型：
--
作者：
R. Wanninkhof;L. Bliven
在荷兰的德尔夫特的一个大型风浪箱中，气-水界面的气体传输速度与风速、摩擦速度和来自表面的雷达后向散射相关。六氟化硫和一氧化二氮的交换率进行了测量，风速范围从3.5米/秒至20米/秒，机械产生的波在100米长，8米宽，0.7米深的坦克。气体传输速度与风速呈幂律关系。气体传递与摩擦速度呈线性关系。气体传输和平均雷达后向散射截面之间的指数关系适合在VV和HH极化中在13.5和35 GHz下工作的微波单元的风洞数据。两种气体的气体交换的相对速率证实了在中等风速下施密特数的平方根反比依赖性。一氧化二氮交换相比，六氟化硫交换的轻微增强是明显的，当破碎波存在。
Gas transfer velocities across the air-water interface are correlated with wind speed, friction velocity, and radar backscatter from the surface in a large wind-wave tank in Delft, the Netherlands. The rates of sulfur hexafluoride and nitrous oxide exchange were measured at wind speeds ranging from 3.5 m/s to 20 m/s, and with mechanically generated waves in the 100 m long, 8 m wide, and 0.7 m deep tank. Gas transfer velocities were related to wind speed with a power law dependence. Gas transfer showed a linear dependence with friction velocity. An exponential relationship between gas transfer and average radar backscatter cross section fits the wind tunnel data well for microwave units operating at 13.5 and 35 GHz in VV and HH polarization. The relative rates of gas exchange of the two gases confirm an inverse square root dependence on the Schmidt number at intermediate wind speeds. A slight enhancement of sulfur hexafluoride exchange compared to nitrous oxide exchange was evident when breaking waves were present.