Shipboard Measurements of DMS and SO2 in ASTEX

ASTEX 中 DMS 和 SO2 的船上测量

• 批准号: 9200620
• 负责人: Alan Bandy
• 金额: $ 25.54万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-01 至 1996-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200620&HistoricalAwards=false
• 关键词: Shipboard; Measurements; DMS; SO2; ASTEX

A set of seven proposals and two supplement requests was submitted for participation in an international marine atmospheric chemistry experiment. The Atlantic Stratocumulus Transition in the eastern North Atlantic during June 1992, is a multinational effort designed to improve our capability for studying cloud-chemistry interactions and the air/sea fluxes that affect them. The specific goals of the MAGE atmospheric chemistry experiment in ASTEX include: 1) develop and test a Lagrangian strategy for studying chemical and meteorological evolution in a tagged airmass, using ships, balloons, and aircraft; 2) develop and test new techniques for estimating trace-gas and aerosol fluxes across the air/sea interface by comparison with traditional approaches; 3) evaluate the impact of marine and continental aerosols and the formation and dissipation of stratocumulus clouds; 4) compare the impacts of natural and anthropogenic sulfur, halogens, and hydrocarbons on marine aerosol chemistry; and 5) use a multinational, multi-agency field experiment as a means for addressing tropospheric chemistry issues. In this MAGE proposal, the PIs propose to conduct measurements of dimethyl sulfide (DMS) in ocean water and sulfur dioxide and DMS in air from shipboard in the study area of ASTEX. The primary objective is to determine the DMS content in the ocean along the track of the parcel sampled in a Lagrangian experiment. The PIs propose to compute the DMS flux along the parcel trajectory using a thin film model. Then, the DMS flux data would be used to reduce the number of variables in the Lagrangian budget analysis or to test the reliability of DMS flux data obtained directly from the budget analysis. Secondary objectives include the determination of DMS and sulfur dioxide in air before and after the air parcel passes over the ship. These data would provide information on the horizontal variation of DMS and sulfur dioxide upwind and downwind of the air parcel. These measurements would compliment those obtained from an aircraft platform because the aircraft will not sample exactly the same air parcel during the Lagrangian experiment. The PIs also propose to obtain sufficient data to characterize the diurnal variation of DMS and sulfur dioxide to aid in testing chemical models of the marine boundary layer.

提出了一套七项提案和两项补充请求， 提交参加国际海洋大气层 化学实验 大西洋中的层积云转变 1992年6月在北大西洋东部，是一个多国努力， 旨在提高我们研究云化学的能力 相互作用和影响它们的空气/海洋通量。 具体 ASTEX中法师大气化学实验的目标 包括：1）开发和测试拉格朗日策略，用于研究 化学和气象演变在一个标记的气团，使用 船舶、气球和飞机; 2）开发和测试新技术 用于估算穿过空气/海洋的痕量气体和气溶胶通量 与传统方法比较的接口; 3）评估 海洋和大陆气溶胶的影响以及 层积云的消散; 4）比较 天然和人为的硫、卤素和碳氢化合物， 海洋气溶胶化学;和5）使用多国，多机构 作为解决对流层化学问题的手段的实地实验 问题. 在该法师提案中，PI建议进行测量 二甲基硫醚（DMS）在海水中的含量以及二氧化硫和DMS 在ASTEX研究区域的船上空气中。 主 目的是确定沿着海洋中DMS的含量， 在拉格朗日实验中取样的包裹的轨迹。 法律与正义党 建议使用以下公式计算沿宗地轨迹沿着的DMS通量 薄膜模型。 然后，DMS通量数据将用于减少 拉格朗日预算分析中的变量数量，或者 测试DMS通量数据的可靠性直接从 预算分析。 次要目标包括确定 空气包裹前后空气中DMS和二氧化硫 越过船。 这些数据将提供有关 DMS和SO2上、下风向水平变化 航空包裹的。 这些测量结果将与那些 从飞机平台获得，因为飞机不会 在拉格朗日过程中对完全相同的气团进行采样 实验 主要研究者还建议获得足够的数据， 描述DMS和二氧化硫的日变化，以帮助 测试海洋边界层的化学模型。