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

9411497沿海海洋过程(COOP)沿海大气-海洋化学通量试点研究的一次性计划公告(NSF93-101)将进行DACEY研究。NSF/COOP的研究将加强并与海军研究办公室(ONR)赞助的海洋边界层(MBL)高级研究倡议(ARI)项目合作，该项目定于1995年在加利福尼亚州蒙特利海岸附近进行。整个科学项目是跨学科的，NSF/COOP的工作涉及化学和生物参数，而ONR的研究重点是物理、海洋和气象参数。研究人员将重点研究沿海海洋中二甲基硫化物(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效应，它们是气候模型中需要考虑的重要因素。缺乏关于二氧化碳和海洋-海洋转移速率的知识，这主要是由于无法以足够高的频率测量这些示踪剂。一项新的自动化采样分析计划将允许连续记录地表水和上覆大气以及地表水剖面中的二甲基硫和二氧化碳浓度。这一抽样计划在很大程度上依赖于自动化仪表包的开发，这些仪表包将在整个实地方案的整个一个月期间持续运行。收集的数据将与来自参与COOP和ONR MBL计划的其他调查人员的物理、生物和化学项目的数据结合使用。最终，生物地球化学海洋过程、海气交换和大气过程的基本问题可能会得到回答，以便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.