Collaborative Research: Coastal Air-Sea Fluxes of CO2: Nutrients and the Biological Pump

该提案是为了响应沿海海洋过程（CoOP）沿海空气-海洋化学通量试点研究的一次性项目公告- NSF 93-101而提交的。《公告》建议存在一个互利的机会来协调国家科学基金会/合作组织的研究工作与计划于1995年由onr赞助的海洋边界层高级研究倡议（ARI）。海洋学合作项目的研究可以通过包括生物和化学海洋学过程来补充海洋研究中心的物理过程研究，其目的是对海气通量有一种机械的了解。整个科学项目将是跨学科的，NSF/CoOP致力于处理化学和生物参数，而ONR的研究侧重于物理海洋学和气象参数。这项研究是与南加州大学合作进行的。这项工作将确定浮游植物生产力对沿海环境中上涌二氧化碳命运的影响。pi计划测量pCO2、TCO2、NO3、NH4、尿素、色素、POC、PON、生物硅（BSi）和Si(OH)4，并在14CO2、15NO3、15NH和15n -尿素中进行孵育，以估计和解释实验区域内的生物活性。最终目标是确定营养物浓度如何控制“新”CO的吸收，以及高地表水pCO2浓度保持在大气水平以上的时间长度。由于新生产的速率控制着新上涌的二氧化碳暴露在大气中的时间长度，因此测量它是彻底了解从海洋到大气的二氧化碳通量转移的关键。数据收集将通过航行和站船活动以及通过漂流和系泊进行。将对选定的样本进行浮游植物种类测定。最后，根据收集到的数据计算出碳氮吸收比、CO2:NO3:Si(OH)4从水柱中消失量以及POC:PON:BSi。拟议的工作将与其他研究人员进行的物理和气象实验相协调。

9419322 Chavez This proposal was submitted 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 Announcement suggested that a mutually beneficial opportunity exists to coordinate an NSF/CoOP research effort with the ONR-sponsored Marine Boundary Layer (MBL) Advanced Research Initiative (ARI) planned for 1995. The CoOP study might complement the ONR physical processes study by encompassing biological and chemical oceanographic processes aimed at developing a mechanistic understanding of air-sea fluxes. The overall scientific project would be interdisciplinary, with the NSF/CoOP efforts addressing chemical and biological parameters, while the ONR study focuses on physical oceanographic and meteorological parameters. This research is a collaborative effort with the University of Southern California. The work will determine the effect of phytoplankton productivity on the fate of upwelled CO2 in coastal environments. The PIs intend to make measurements of pCO2, TCO2, NO3, NH4, urea, pigments, POC, PON, biogenic silicon (BSi) and Si(OH)4 and also perform incubations with 14CO2, 15NO3, 15NH, and 15N-urea to estimate and interpret biological activities within the region of the experiment. The ultimate goal is to determine how nutrient concentrations control uptake of "new" CO and the length of time that high surface water pCO2 concentrations remain above atmospheric levels. Because the rate of new production controls the length of time newly upwelled CO2 are exposed to the atmosphere, its measurement is key to a thorough understanding of the CO2 flux transfer from ocean to atmosphere. Data collection will be conducted through both underway and station shipboard activities as well as through drifters and moorings. Phytoplankton species determinations will be made on selected samples. Finally, the ratios of uptake of carbon to nitrogen, disappearance of CO2:NO3:Si( OH)4 from the water column, and POC:PON:BSi will be calculated from collected data. The proposed work will be coordinated with physical and meteorological experiments to be conducted by other researchers.