Collaborative Research: Wave driven flow through a shallow, fringing reef
合作研究:波浪驱动流过浅层岸礁
基本信息
- 批准号:1536502
- 负责人:
- 金额:$ 78.74万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-10-01 至 2019-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Coral reefs face two significant long-term challenges to their existence: (1) Ocean acidification, which hinders the ability of corals to calcify; and (2) Ocean warming, which leads to coral bleaching. The Ofu reef (American Samoa), home to corals that seem to have exceptional bleaching resistance, is the location of active research into how corals may be able to meet those challenges biologically and biogeochemically. Given that both carbon system and temperature dynamics on the reef depend on flow, the physical insights and quantitative results from the data and modeling of this study should provide significant input to studies of ecology and biogeochemistry at Ofu and other similar reefs. In addition, the project will advance the technology for mapping reefs at high resolution. The project will involve several undergraduate and graduate students, as well as a postdoctoral scientist, providing unique material for university courses. The results of this study will be brought to the general public through a series of short online videos, produced to explain the link between hydrodynamic processes and reef health.The goals of this project are: (1) Test the concept that the relative importance of friction in the lagoon and friction on the reef crest determines the structure of the overall circulation; (2) Test the hypothesis that drag coefficients related to local, spatially averaged, flows can be estimated from data on reef topography; (3) Carry out a quantitative evaluation of the dynamics of Ofu reef flows using a depth-averaged circulation model based on detailed bathymetry and estimates of spatially variable drag parameterizations. The primary activities of this project would be: (a) Mapping of reef bathymetry at decimeter scale using an Unmanned Aerial Vehicle carrying cameras and novel image processing of the resulting images; (b) Deploying a set pressure loggers, temperature loggers, acoustic Doppler current profilers and a meteorological station for a 2-km long section of the Ofu reef for two one-month periods and analyzing the results of these observations to estimate flow properties such as drag; (c) Idealized and realistic modeling studies carried out using a three dimensional model. The design of the instrument array in combination with the mapping and modeling is intended to both test the conceptual circulation model and to evaluate how drag on different parts of the reef varies with overall depth, flow and with geometric parameters describing the physical structure of the reef.
珊瑚礁的生存面临两个重大的长期挑战:(1)海洋酸化,阻碍珊瑚钙化的能力;(2)海洋变暖,导致珊瑚白化。 奥福岛珊瑚礁(美属萨摩亚)是似乎具有特殊抗漂白能力的珊瑚的家园,是积极研究珊瑚如何能够在生物和地球化学方面应对这些挑战的地方。鉴于珊瑚礁的碳系统和温度动态都依赖于流量,本研究的数据和建模的物理见解和定量结果应该为Ofu和其他类似珊瑚礁的生态学和生物地球化学研究提供重要的投入。此外,该项目还将推进高分辨率珊瑚礁测绘技术。 该项目将涉及几名本科生和研究生,以及一名博士后科学家,为大学课程提供独特的材料。 这项研究的结果将通过一系列简短的在线视频向公众展示,这些视频旨在解释水动力过程与珊瑚礁健康之间的联系。该项目的目标是:(1)测试泻湖摩擦力和礁顶摩擦力的相对重要性决定整体环流结构的概念;(2)检验与局部空间平均流有关的阻力系数可以从珊瑚礁地形数据估算的假设;(3)利用深度-基于详细水深测量和空间可变阻力参数化估计的平均环流模型。 (a)利用携带照相机的无人驾驶航空器绘制分米尺度的珊瑚礁水深图,并对所得图像进行新的图像处理;(B)部署设定压力记录器、温度记录器,声学多普勒海流剖面仪和一个气象站,用于奥福岛2公里长的部分,(c)使用三维模型进行理想化和现实的建模研究。仪器阵列的设计与绘图和建模相结合,旨在测试概念环流模型,并评估珊瑚礁不同部分的阻力如何随总体深度、流量和描述珊瑚礁物理结构的几何参数而变化。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Stephen Monismith其他文献
Stephen Monismith的其他文献
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{{ truncateString('Stephen Monismith', 18)}}的其他基金
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$ 78.74万 - 项目类别:
Standard Grant
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$ 78.74万 - 项目类别:
Standard Grant
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$ 78.74万 - 项目类别:
Standard Grant
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$ 78.74万 - 项目类别:
Standard Grant
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$ 78.74万 - 项目类别:
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- 资助金额:
$ 78.74万 - 项目类别:
Standard Grant
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