Measurement of DiMethyl Sulfide (DMS) Air-Sea Exchange by Eddy Covariance

通过涡度协方差测量二甲硫醚 (DMS) 气海交换

• 批准号: 0526341
• 负责人: Barry Huebert
• 金额: $ 67.33万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0526341&HistoricalAwards=false
• 关键词: Measurement; DiMethyl; Sulfide; DMS; Air

A newly developed eddy covariance flux system will be used to quantify fluxes of dimethyl sulfide (DMS) and elucidate the factors controlling these fluxes. An atmospheric pressure ionization mass spectrometer with an isotopically labeled standard (APIMS-ILS) will be used on ships to make fast measurements of atmospheric DMS for use in the eddy covariance studies of the flux of DMS. Laboratory work will be performed to improve characterization of the errors and improving the sensitivity of the instrument, and the software will be upgraded to allow real time feedback from the instrument in the field. Several ship cruises have been identified for measurements of DMS flux under different conditions and with differing overall objectives. Through collaborations with other cruise participants, ancillary measurements will be available. The objectives include investigating the factors controlling DMS exchange velocity, such as surface wind speed, temperature, and biological variations; and studying the relationship between DMS production, air-sea exchange, oxidation to sulfate, and particle formation to climate forcing.This project will lead to an improvement in our understanding of marine aerosol formation and air-sea gas exchange, which in turn will improve our understanding of the linkages between the sulfur cycle and climate. The project will contribute to the training of a graduate student.

新开发的涡流协方差通量系统将用于量化二甲硫醚（DMS）的通量并阐明控制这些通量的因素。带有同位素标记标准的大气压电离质谱仪（APIMS-ILS）将在船上使用，以快速测量大气 DMS，用于 DMS 通量的涡流协方差研究。将进行实验室工作以改进误差表征并提高仪器的灵敏度，并且将升级软件以允许来自现场仪器的实时反馈。已确定在不同条件下和具有不同总体目标的几艘船舶巡航中测量 DMS 通量。通过与其他邮轮参与者的合作，将提供辅助测量。目标包括研究控制 DMS 交换速度的因素，例如表面风速、温度和生物变化；并研究DMS产生、海气交换、氧化成硫酸盐以及颗粒形成与气候强迫之间的关系。该项目将提高我们对海洋气溶胶形成和海气交换的认识，进而提高我们对硫循环与气候之间联系的认识。该项目将有助于研究生的培训。