Dynamics of Gas Bubbles From a Submarine Hydrocarbon Seep Within the Hydrate Stability Zone
Dynamics of Gas Bubbles From a Submarine Hydrocarbon Seep Within the Hydrate Stability Zone
复制标题
水合物稳定区内海底碳氢化合物渗漏的气泡动力学
DOI：
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发表时间：
2020
影响因子：
5.2
通讯作者：
J. Kessler
中科院分区：
文献类型：
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作者：
Binbin Wang;I. Jun;S. Socolofsky;S. DiMarco;J. Kessler
我们通过对墨西哥湾北部883m处的渗漏进行综合观测，验证了大陆边缘天然渗漏的质量传递和气泡输送的新模型。在该模型中，假设传质速率从清洁气泡向污浊气泡的传质速率转变，经过一段特征的水合物形成时间，该时间取决于初始气泡表面积和水合物过冷度。结果表明，对于气泡流，浮力诱导的上升流可以忽略不计。我们使用在海底观测到的精确数据来初始化模型，并将模型结果与气泡流中的光学和声学测量结果进行验证。该模型通过水柱的横向扩展和气泡收缩，准确地预测了气泡耀斑的声学衰减。模型表明，高达99.4%的从这个渗漏释放的气体在水合物稳定区内溶解到海洋中。
We validate a new model for mass transfer and bubble transport for natural seeps on the continental margins using an integrated observation of a seep at 883 m in the Northern Gulf of Mexico. In the model, mass transfer is assumed to transition from clean to dirty bubble mass transfer rates following a characteristic hydrate formation time that depends on the initial bubble surface area and the hydrate subcooling. We show that buoyancy‐induced upwelling is negligible for the bubble stream. We initialize the model using precise data observed at the seafloor and validate the model results to optical and acoustic measurements within the bubble stream. The model accurately predicts the acoustic attenuation of the bubble flare by lateral spreading and bubble shrinkage throughout the water column. The model shows that up to 99.4% by mass of the released gases from this seep dissolves into the ocean within the hydrate stability zone.