A reconciliation of empirical and mechanistic models of the air-sea gas transfer velocity
A reconciliation of empirical and mechanistic models of the air-sea gas transfer velocity
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DOI：
10.1002/2015jc011096
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发表时间：
2016-01-01
影响因子：
3.6
通讯作者：
Shutler, Jamie D.
中科院分区：
文献类型：
--
作者：
Goddijn-Murphy, Lonneke;Woolf, David K.;Shutler, Jamie D.
气体海气输送速度的模式可以是经验的，也可以是机械的。如果外推的基础有缺陷，经验模型对未测量的气体或另一种水温的外推可能是错误的。这个问题很容易在最著名的经验气体传递速度模型中得到证明，在这些模型中，气泡介导的传递的影响可能在气体之间变化，但没有明确考虑。对海气输送机制的不完全了解阻碍了机制模式的发展。我们描述了一个混合模型，该模型结合了简单的机械观点，严格区分直接和气泡介导的转移，但也使用基于二甲基硫化物（DMS）涡流通量测量数据的参数化来校准模型，同时使用双示踪剂结果来评估模型。该模型支持简单的算法，可以很容易地应用于计算局部、区域或全球气体的海气通量的方案中。
Models of the air-sea transfer velocity of gases may be either empirical or mechanistic. Extrapolations of empirical models to an unmeasured gas or to another water temperature can be erroneous if the basis of that extrapolation is flawed. This issue is readily demonstrated for the most well-known empirical gas transfer velocity models where the influence of bubble-mediated transfer, which can vary between gases, is not explicitly accounted for. Mechanistic models are hindered by an incomplete knowledge of the mechanisms of air-sea gas transfer. We describe a hybrid model that incorporates a simple mechanistic viewstrictly enforcing a distinction between direct and bubble-mediated transferbut also uses parameterizations based on data from eddy flux measurements of dimethyl sulphide (DMS) to calibrate the model together with dual tracer results to evaluate the model. This model underpins simple algorithms that can be easily applied within schemes to calculate local, regional, or global air-sea fluxes of gases.