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The effects of experimental uncertainty in parameterizing air-Sea gas exchange using tracer experiment data

机译：使用示踪剂实验数据，实验不确定性对海气交换参数化的影响

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摘要

It is not practical to measure air-sea gas fluxes in the open ocean for all conditions and areas of interest. Therefore, in many cases fluxes are estimated from measurements of air-phase and water-phase gas concentrations, a measured environmental forcing function such as wind speed, and a parameterization of the air-sea transfer velocity in terms of the environmental forcing function. One problem with this approach is that when direct measurements of the transfer velocity are plotted versus the most commonly used forcing function, wind speed, there is considerable scatter, leading to a relatively large uncertainty in the flux. Because it is known that multiple processes can affect gas transfer, it is commonly assumed that this scatter is caused by single-forcing function parameterizations being incomplete in a physical sense. However, scatter in the experimental data can also result from experimental uncertainty (i.e., measurement error). Here, results from field and laboratory results are used to estimate how experimental uncertainty contributes to the observed scatter in the measured fluxes and transfer velocities as a function of environmental forcing. The results show that experimental uncertainty could explain half of the observed scatter in field and laboratory measurements of air-sea gas transfer velocity.
机译：对于所有感兴趣的条件和区域，在公海中测量海气通量是不切实际的。因此，在许多情况下，通量是通过测量气相和水相气体浓度，测量到的环境强迫函数（例如风速）和根据环境强迫函数对海气传输速度进行参数化来估算的。这种方法的一个问题是，当绘制传输速度的直接测量值与最常用的强迫函数风速的关系曲线时，会出现相当大的分散，从而导致通量的不确定性相对较大。因为已知多个过程会影响气体传输，所以通常认为此分散是由单强迫函数参数化在物理意义上不完整引起的。但是，实验数据的散布也可能是由于实验不确定性（即测量误差）引起的。在这里，来自野外和实验室结果的结果被用于估计实验不确定性如何对所测通量和传输速度中所观察到的散射（作为环境强迫的函数）作出贡献。结果表明，实验的不确定性可以解释在野外和实验室测量的海气传输速度中观察到的散射的一半。

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