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

9411497黛西研究将响应沿海海洋过程（CoOP）沿海空气-海洋化学通量试点研究的一次性计划公告（NSF 93-101）进行。NSF/CoOP研究将与海军研究办公室（ONR）赞助的海洋边界层（MBL）高级研究计划（ARI）项目进行补充和合作，该项目计划于1995年在加利福尼亚州蒙特雷海岸进行。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的研究侧重于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硫化物（DMS）和二氧化碳的海气通量。CO2和DMS是上层海洋中最重要的两种生物气体，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。由于无法在足够高的频率上测量这些示踪剂，因此缺乏关于CO2和DMS空气-海洋传输速率的知识。一种新的自动采样分析方案将允许对地表水和上覆大气以及地表水剖面中的DMS和pCO2浓度进行连续记录。该采样方案在很大程度上依赖于自动化仪器包的开发，这些仪器包将在整个现场项目持续一个月的时间内持续运行。收集的数据将与参与CoOP和ONR MBL项目的其他研究人员的物理、生物和化学项目的数据一起使用。最终，海洋生物地球化学过程、海气交换和大气过程的基本问题可能得到解答，从而更好地验证和校准现有气候模型，并开发新的模型来预测这些重要温室气体的局部和全球动态。

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.