SGER: Measurments of Mesoscale Surface Currents in Support of Space-Time Translocation Patterns of Reef Fish

SGER：支持珊瑚鱼时空易位模式的中尺度表面电流测量

• 批准号: 9712630
• 负责人: Hans Graber
• 金额: $ 5万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-15 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9712630&HistoricalAwards=false
• 关键词: SGER; Measurments; Mesoscale; Surface; Currents

*** Graber 9721630 In this study we propose to augment the on-going biological and physical sampling phase of Cowen, Lwiza and Schultz (NSF OCE:-9521104) on the west coast of the oceanic island Barbados with surface current measurements using HF remote sensing technology. The measurements would provide maps of the evolution of the spatial and temporal variability in the regional circulation and the interactions of local flow with eddies generated at the retroflection of the North Brazil Current. The radar would operate in HF mode which would provide a spatial resolution of 1 km and would coincide with the shipboard biological/physical sampling scheme. The radar currents would provide crucial information on the dominant flow components such as tides, wind-driven, mean and residual circulation in this region. The HF radar measurements would be used to characterize the time space scales of the hydrographic signatures associated with eddies generated by the retroflection of the North Brazil Current. The addition of the remotely sensed currents to the shipboard sampling will provide direct measurements of the surface flow. Such information is crucial to interpreting the distribution of late-stage larvae that occupy this upper layer of the water column. Decomposing the current into components would be used to examine how the flow is influenced by such forcing agents as the wind. This is particularly valuable in the lee of the island where the wind stress will vary both spatially and temporally. Combining the surface and subsurface current measurements with the biological sampling would allow us to examine the linkages between reef fish larval distributions and island flow patterns. Specifically our study could assess the impact of offshore mesoscale events disturbing the local now regime and the fate of larval retention. Such knowledge is essential to understand the translocation patterns of coral reef fish larvae in an island wake environment. ***

*** 格雷勃 9721630 在这项研究中，我们建议增加正在进行的生物和物理采样阶段的考恩，Lwiza和舒尔茨（NSF OCE：-9521104）在西海岸的海洋岛屿巴巴多斯与表面电流测量使用高频遥感技术。这些测量将提供区域环流时空变化演变图以及当地水流与北巴西海流回折产生的涡流相互作用图。 该雷达将以高频模式工作，空间分辨率为1公里，并与船上生物/物理取样计划相一致。 雷达海流将提供有关该区域主要气流成分的重要信息，如潮汐、风力、平均环流和剩余环流。高频雷达测量将被用来描述与北巴西海流回折产生的涡流有关的水文特征的时空尺度。 在船上取样的基础上增加遥感海流，将可直接测量表层水流。 这些信息对于解释 晚期幼虫的栖息地在水柱的上层。 将海流分解成各个分量，可以用来研究海流如何受到风等强迫因子的影响。 这在风应力在空间和时间上都有变化的岛屿背风处特别有价值。结合表面和次表面电流测量的生物采样将使我们能够检查珊瑚礁鱼类幼虫分布和岛屿流模式之间的联系。 具体来说，我们的研究可以评估 影响 近海中尺度事件干扰当地的现在制度和幼虫保留的命运。 这种知识 是必不可少的，以了解易位模式的珊瑚礁鱼幼虫在岛屿尾流环境。 ***