Direct Measurement of the Dimethyl Sulfide (DMS) Sea-Air Flux and Exchange Coefficient

该项目是朝着更好地了解海-气相互作用，特别是海洋和大气之间的气体通量迈出的创新一步。调查人员将首先在实验室中改装一种新开发的用于舰载应用的大气压电离质谱仪(APIMS)。测试结束后，研究人员将与其他一些小组合作进行海洋研究巡航，并使用APIMS系统直接测量二甲基硫化物(DMS)的海空通量，二甲基硫化物是一种重要的生物痕量气体和天然二次气溶胶前体。这项研究的更广泛影响包括开发一种非常强大的工具，可能对大气界非常重要。该项目的成果将提供有关DMS通量的重要新数据，有助于改进全球模式中海-气交换过程的参数化，并提供一个技术框架，可在今后的研究中利用该框架研究与气候有关的其他痕量气体。根据该项目，研究生还将接受实验室培训和海上研究经验。

This project is an innovative step toward a better understanding of sea-air interaction, in particular gas fluxes between the ocean and atmosphere. The investigators will initially modify in the laboratory a newly developed Atmospheric Pressure Ionization Mass Spectrometer (APIMS) for shipboard applications. After testing, the investigators will collaborate with a number of other groups on ocean research cruises and use the APIMS system to measure directly the sea-to-air flux of dimethyl sulfide (DMS), an important biogenic trace gas and natural secondary aerosol precursor. The broader impacts of this research include developing a very powerful tool potentially of great importance to the atmospheric community. The project results will provide important new data on DMS fluxes useful for improving parameterizations of the sea-air exchange process in global models, and provide a technical framework by which other trace gases relevant to climate might be investigated in future studies. Graduate students will also receive laboratory training and research experience at sea under the project.