Direct Measurements of Carbon Dioxide (CO2), Dimethylsulfide (DMS), and Acetone Fluxes Over the Ocean by Eddy Covariance

三种对大气有重要影响的气体(二氧化碳、二甲基硫化物和丙酮)的海气通量将在船舶平台上使用涡旋协方差技术进行测量。此外，这些物种的水浓度将被量化。根据大气和海洋浓度的梯度，以及观测到的交换通量，将有可能得出气体交换系数。这些气体具有非常不同的海水溶解度，因此在各种生物地球化学、海洋学和大气条件下比较这些系数将有助于深入了解海-气交换的机制。这项工作的广泛影响包括通过帮助量化这些物种的重要源和汇来帮助理解影响大气反应和气候变化的过程。这项研究中获得的数据将对检验这些物种的预算模型有价值。该项目还将为研究生开展学位论文研究提供支持。

Air-sea fluxes of three atmospherically important gases (carbon dioxide, dimethylsulfide, and acetone) will be measured aboard a ship platform using the technique of eddy covariance. In addition, the water concentrations of these species will be quantified. From the gradient in air and sea concentrations, and the observed exchange flux, it will be possible to derive gas exchange coefficients. The gases have very different seawater solubilities, so comparison of these coefficients under a variety of biogeochemical, oceanographic, and atmospheric conditions will provide significant insight into the mechanism of air-sea gas exchange.Broader impacts of this work include contributions to the understanding of processes affecting atmospheric reactivity and climate change by helping to quantify important sources and sinks of these species. The data acquired in this study will be valuable for testing models of the budgets of these species. This project will also provide support for a graduate student to carry out dissertation research.