Influence of rain on air-sea gas exchange: Lessons from a model ocean
Influence of rain on air-sea gas exchange: Lessons from a model ocean
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DOI：
10.1029/2003jc001806
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发表时间：
2004-07-01
影响因子：
3.6
通讯作者：
Hendricks, MB
中科院分区：
文献类型：
--
作者：
Ho, DT;Zappa, CJ;Hendricks, MB
在淡水环境中，雨水可以显著提高空气-水气体交换的速率，并在实验室实验中研究了这种增强的机理。在海洋中，由于水面密度分层的潜在影响，降雨的影响变得复杂。由于在开阔海域很难进行可控的雨诱导气体交换实验，在生物圈2号的人工海洋中进行了SF6躲避实验。测量结果表明，由于降雨促进了海-气交换，表层SF6迅速耗尽，气体传输速度与根据淡水实验室实验建立的关系预测的结果相似。然而，由于层化减少了垂直混合，总体气体通量比淡水实验中发现的要低。对降雨期间海洋各种性质的物理测量进一步阐明了观测到的反应背后的机制。研究结果表明，短暂而强烈的降雨事件加速了海洋环境中的气体交换。
Rain has been shown to significantly enhance the rate of air-water gas exchange in fresh water environments, and the mechanism behind this enhancement has been studied in laboratory experiments. In the ocean, the effects of rain are complicated by the potential influence of density stratification at the water surface. Since it is difficult to perform controlled rain-induced gas exchange experiments in the open ocean, an SF6 evasion experiment was conducted in the artificial ocean at Biosphere 2. The measurements show a rapid depletion of SF6 in the surface layer due to rain enhancement of air-sea gas exchange, and the gas transfer velocity was similar to that predicted from the relationship established from freshwater laboratory experiments. However, because vertical mixing is reduced by stratification, the overall gas flux is lower than that found during freshwater experiments. Physical measurements of various properties of the ocean during the rain events further elucidate the mechanisms behind the observed response. The findings suggest that short, intense rain events accelerate gas exchange in oceanic environments.