Relationship between wind speed and gas exchange over the ocean revisited
Relationship between wind speed and gas exchange over the ocean revisited
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DOI：
10.4319/lom.2014.12.351
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
R. Wanninkhof
中科院分区：
文献类型：
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作者：
R. Wanninkhof
气体交换与风速之间的关系被广泛地用于估算大气气体通过海-气界面的总体通量。在这里，我提供一个关于Wanninkhof(1992)常用方法的更新。该方法的更新反映了过去二十年来在量化投入参数方面取得的进展。获得受全球一体化炸弹-14CO2进入海洋的通量限制的关系的总原则保持不变。这种改善的关系是利用修订的全球海洋14C库存和改进的风速产品创建的。为了便于在模型中使用，将确定通量所必需的施密特数的经验关系扩展到40°C。重点是二氧化碳的气体交换，但建议的功能可以扩展到中风的其他气体(≈4−15 m S−1)。更新的关系式表示为k=0.251(SC/660)−0.5，其中k是气体传输速度，是平均平方风速，SC是施密特数，具有20%的不确定性。这一关系与最近基于海洋气体交换过程研究结果的参数化结果非常一致。
The relationship between gas exchange and wind speed is used extensively for estimating bulk fluxes of atmospheric gases across the air‐sea interface. Here, I provide an update on the frequently used method of Wanninkhof (1992). The update of the methodology reflects advances that have occurred over the past two decades in quantifying the input parameters. The general principle of obtaining a relationship constrained by the globally integrated bomb‐14CO2 flux into the ocean remains unchanged. The improved relationship is created using revised global ocean 14C inventories and improved wind speed products. Empirical relationships of the Schmidt number, which are necessary to determine the fluxes, are extended to 40°C to facilitate their use in the models. The focus is on the gas exchange of carbon dioxide, but the suggested functionality can be extended to other gases at intermediate winds (≈4−15 m s−1). The updated relationship, expressed as k = 0.251 (Sc/660)−0.5 where k is the gas transfer velocity, is the average squared wind speed, and Sc is the Schmidt number, has a 20% uncertainty. The relationship is in close agreement with recent parameterizations based on results from gas exchange process studies over the ocean.