Collaborative Research: Dye Tracer and Modeling Investigations of Cross-Shelf Circulation during Coastal Upwelling

合作研究：沿海上升流期间跨陆架环流的染料示踪剂和模拟研究

• 批准号: 0136529
• 负责人: Jay Austin
• 金额: $ 10.66万
• 依托单位: Old Dominion University Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0136529&HistoricalAwards=false
• 关键词: Collaborative; Research; Dye; Tracer; Modeling

Austin0136529Field and simulation studies will be used to determine where upwelled water originates, i.e. solely from the bottom boundary layer (BBL) or from a thicker region of the lower layer fluid, and where the displaced surface water goes, e.g. offshore in the the surface layer or, through subduction, to intermediate layers. Five dye studies, using fluorescene and rhodamine-WT, are proposed for the upwelling region over the Oregon shelf. Releases will occur in three different locations - beneath and inshore of the upwelling jet, in the BBL beneath the jet where onshore movement is expected, and inshore of the jet, just beneath the mixed layer but still in the Ekman layer, where offshore movement and possible subduction is expected. Dye will be tracked for 72 hours. The background environment will be defined by GLOBEC cruises, at least during the first field year. Three releases from the R/V Elakha will be traced during the first year. The second year will involve two larger releases from the R/V Wecoma. A version of the Princeton Ocean Model, configured for the region, will be run for comparison. Particle tracing techniques will be used to model the initial, small-scale dispersion. Both idealized situations and realistic modeling will be attempted. A 2-D ocean-going model will be used, in conjunction with buoyed GPS drifters, to track the subsurface dye patch after release. The results of the study will be a set of Lagrangian observations of cross-shelf transport pathways during upwelling. These will lead to improved understanding of circulation and mixing.

Austin0136529场和模拟研究将用于确定上升水的起源地点，即仅来自底部边界层（BBL）或下层流体的较厚区域，以及位移的地表水的位置，例如。在表面层或通过俯冲到中间层的近海。 五项使用荧光和若丹明 - WT的染料研究提出了俄勒冈州架子上升区域的染料。 释放将在三个不同的位置（下方的射流的下方和近海）发生，在预期陆上运动的射流下方的BBL和射流的近海，就在混合层的下方，但仍位于埃克曼层下方，在埃克曼层中，在近海运动和可能的俯冲。 染料将被跟踪72小时。 至少在第一场比赛中，环境环境将由Globec Cruises定义。 R/V Elakha的三个发行版将在第一年进行追踪。 第二年将涉及来自R/V Wecoma的两个较大版本。 为该地区配置的普林斯顿海洋模型的版本将进行比较。 粒子追踪技术将用于建模初始的小规模分散体。 理想的情况和现实的建模都将尝试。 释放后，将使用二维远洋模型与浮力的GPS漂移器一起跟踪地下染料贴片。 该研究的结果将是一组在上升过程中跨架运输途径的拉格朗日观察。 这些将导致人们对循环和混合的了解。