Dynamics and Sea-Air Exchange of Dimethysulfide and Carbon Dioxide in Coastal Waters

沿海水域二甲硫醚和二氧化碳的动力学和海气交换

• 批准号: 9411497
• 负责人: John W Dacey
• 金额: $ 35.74万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9411497&HistoricalAwards=false
• 关键词: Dynamics; Sea; Air; Exchange; Dimethysulfide

9411497 Dacey Research will be undertaken in response to a one-time Program Announcement (NSF 93-101) for the Coastal Ocean Processes (CoOP) Coastal Air-Sea Chemical Fluxes pilot study. The NSF/CoOP Study will augment and collaborate with the Office of Naval Research (ONR) -sponsored Marine Boundary Layer (MBL) Advanced Research Initiative (ARI) project scheduled for 1995 off the coast of Monterey, California. The overall scientific project is interdisciplinary, with the NSF/CoOP efforts addressing chemical and biological parameters, while the ONR study focuses on physical oceanographic and meteorological parameters. The investigators will focus on the air-sea flux of dimethylsulfide (DMS) and CO2 in coastal ocean. CO2 and DMS represent two of the most important biogasses in the upper ocean and because of their spectral properties or greenhouse potential, they are important factors to be considered in climate models. There is a lack of knowledge concerning CO2 and DMS air-sea transfer rates, due primarily to the inability to measure these tracers at high enough frequency. A new automated sampling - analysis scheme will allow for a continuous record of DMS and pCO2 concentrations in both surface waters and the overlying atmosphere, as well as in surface water profiles. This sampling scheme relies heavily on the development of automated instrumentation packages that will continuously operate for the full month-long duration of the field program. Data collected will be used in conjunction with data from physical, biological, and chemical projects from other investigators participating in both in CoOP and ONR MBL programs. Ultimately, fundamental questions of biogeochemical ocean processes, air-sea exchange, and atmospheric processes may be answered to better enable validation and calibration of existing climate models and develop new models for predicting local and global dynamics for these important greenhouse gasses.

小行星9411497 将根据沿海海洋过程沿海海气化学通量试点研究的一次性方案公告（NSF 93-101）开展研究。 NSF/CoOP研究将加强海军研究办公室（ONR）赞助的定于1995年在加州蒙特雷海岸外进行的海洋边界层高级研究计划（ARI）项目并与之合作。 整个科学项目是跨学科的，NSF/CoOP致力于解决化学和生物参数，而ONR研究的重点是物理海洋学和气象参数。 研究人员将重点关注沿海海洋中二甲基硫（DMS）和CO2的海气通量。 CO2和DMS是海洋上层最重要的两种大气物质，由于它们的光谱特性或温室潜力，它们是气候模式中需要考虑的重要因素。 人们对CO2和二甲基硫醚的海气转移率缺乏了解，主要是因为无法以足够高的频率测量这些示踪剂。 一种新的自动取样分析方案将允许连续记录地表沃茨和上层大气以及地表水剖面中的二甲基硫和二氧化碳分压浓度。 这种取样方案在很大程度上依赖于自动化仪器包的开发，这些仪器包将在为期一个月的现场方案中连续运行。 收集的数据将与参与CoOP和ONR MBL项目的其他研究者的物理、生物和化学项目的数据结合使用。 最终，海洋地球化学过程，海气交换和大气过程的基本问题可能会得到回答，以更好地验证和校准现有的气候模型，并开发新的模型来预测这些重要的温室气体的本地和全球动态。