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

9419322查韦斯本提案是对一次性方案公告--NSF93-101关于沿海海洋过程(COOP)沿海大气-海洋化学通量试点研究的回应而提交的。公告表明，存在一个互惠互利的机会，以协调NSF/COOP研究工作与ONR赞助的海洋边界层(MBL)高级研究倡议(ARI)计划于1995年进行的合作。COOP研究可通过涵盖生物和化学海洋学过程来补充ONR物理过程研究，其目的是从机理上理解海-气通量。整个科学项目将是跨学科的，NSF/COOP的工作涉及化学和生物参数，而ONR研究的重点是物理、海洋和气象参数。这项研究是与南加州大学的合作成果。这项工作将确定浮游植物生产力对沿海环境中上升的二氧化碳命运的影响。PIs打算测量PCO2、TCO2、NO3、NH4、尿素、颜料、POC、PON、生物硅(BSI)和Si(OH)4，并与14CO2、15NO3、15NH和15N-尿素进行孵育，以评估和解释实验区域内的生物活性。最终目标是确定营养物质浓度如何控制“新”CO的吸收，以及高地表水二氧化碳浓度保持在大气水平以上的时间长度。由于新的产生率控制着新涌出的二氧化碳暴露在大气中的时间长度，因此它的测量是彻底了解从海洋到大气的二氧化碳通量转移的关键。数据收集将通过正在进行的船上活动和空间站船上活动以及通过漂流者和系泊设备进行。浮游植物种类的确定将在选定的样本上进行。最后，将根据收集的数据计算碳/氮吸收比、二氧化碳：硝酸根：硅(OH)4从水柱中的消失率以及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.