Collaborative Research: A Lagrangian SeaSoar Study of the Coupling of Circulation, Mixing, and Productivity at a Shelfbreak Front

协作研究：货架断裂前沿循环、混合和生产率耦合的拉格朗日 SeaSoar 研究

• 批准号: 0002755
• 负责人: Burke Hales
• 金额: $ 35.59万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002755&HistoricalAwards=false
• 关键词: Collaborative; Research; Lagrangian; SeaSoar; Study

0002755 HalesThe cause for the observed coincidence of enhanced biological activity in the vicinity of shelfbreak fronts will be investigated by a series of field experiments in the Middle Atlantic Bight. The hypotheses to be tested are both physical and biological. First the convergence of buoyancy flux in the bottom boundary layer drives upwelling of nutrient rich Shelf Water along the shoreward side of the shelfbreak front. Second, the biological activity is enhanced due to this large flux nutrient and by optimal optical conditions as the water transitions from turbid shelf water to clear oceanic water, making the front a region with high photosynthetic efficiency. Five new technologies (dye tracer, isopycnal floats, pumped Seasoar with high speed chemical analysis, towed microstructure instrument and use of optical variability to estimate photosynthetic properties of phytoplankton) will used in three 10-dy cruises to track the front in a Lagrangian framework.

0002755 HalesThe的原因，观察到的一致性增强的生物活性在附近的货架断裂前将调查的一系列现场实验中大西洋湾。要检验的假设是物理的和生物的。首先，底边界层浮力通量的汇聚驱动富营养陆架水沿陆架坡折前缘的向岸侧沿着上涌。第二，由于这种大通量的营养物质和最佳的光学条件的水从浑浊的陆架水透明的海洋水过渡，使前面的一个区域具有高光合效率的生物活性增强。五项新技术（染料示踪剂、等密度浮标、带高速化学分析的泵送Seasoar、拖曳式显微结构仪器和利用光学变化估计浮游植物的光合特性）将用于三次为期10天的巡航，在拉格朗日框架内跟踪锋面。