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基硫化物（DMS）的通量，并阐明控制这些通量的因素。大气压力电离质谱仪具有同位标记的标准标准（APIMS-IL），将在船上使用，以快速测量大气DMS，以用于DMS通量的Eddy协方差研究。将进行实验室工作，以改善错误的表征并提高仪器的灵敏度，并将升级软件以允许从现场仪器中的实时反馈。在不同条件下以及总体目标不同的情况下，已经确定了几次船巡航，以测量DMS通量。通过与其他巡航参与者的合作，将提供辅助测量。这些目标包括研究控制DMS交换速度的因素，例如表面风速，温度和生物学变化；并研究DMS生产，空气交换，氧化硫酸盐以及颗粒形成与气候强迫之间的关系。该项目将改善我们对海洋气溶胶形成和气海气交换的理解，这将改善我们对硫周期与气候之间的联系的理解。该项目将有助于培训研究生。