OCEANS 2009最新文献_第6页

Wave transformation over Sabine Bank, off the Louisiana-Texas coast: Implications of targeted sand mining for coastal restoration 路易斯安那-德克萨斯海岸Sabine Bank上的波浪变化:针对海岸恢复的采砂影响

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422176

F. Jose, G. Stone

引用次数: 1

An autonomous mobile platform for underway surface carbon measurements in open-ocean and coastal waters 一个自主移动平台，用于在公海和沿海水域进行表面碳测量

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422067

S. Willcox, C. Meinig, C. Sabine, N. Lawrence‐Slavas, Tim Richardson, R. Hine, J. Manley

引用次数: 21

SENSE IT — Student enabled network of sensors for the environmental using innovative technology SENSE IT -使用创新技术的学生环境传感器网络

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/oceans.2009.5422437

L. Hotaling

引用次数: 2

Development of a Global Marine Environmental Library 全球海洋环境图书馆的建设

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422354

M. Schexnayder, B. Hall, M. Bourgeois

引用次数: 0

Measuring coastal sea-surface salinity of the Louisiana shelf from aerially observed ocean color 从空中观测到的海洋颜色测量路易斯安那州大陆架的沿海海面盐度

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422288

V. Maisonet, J. Wesson, D. Burrage, S. Howden

引用次数: 6

RBI for fixed, mobile, and floating offshore platforms RBI适用于固定式、移动式和浮式海上平台

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422115

P. Marshall, L. Goldberg

引用次数: 1

Mixture theory model sensitivity to effective viscosity in simulations of sandy bedform dynamics 砂质河床动力学模拟中混合理论模型对有效黏度的敏感性

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422143

A. Penko, J. Calantoni, D. Slinn

{"title":"Mixture theory model sensitivity to effective viscosity in simulations of sandy bedform dynamics","authors":"A. Penko, J. Calantoni, D. Slinn","doi":"10.23919/OCEANS.2009.5422143","DOIUrl":"https://doi.org/10.23919/OCEANS.2009.5422143","url":null,"abstract":"We perform a sensitivity analysis on a three-dimensional bottom boundary layer model (SedMix3D) that uses mixture theory to simulate the flow and sediment transport over rippled sand beds. SedMix3D treats the fluid-sediment mixture as a single continuum with effective properties that parameterize the fluid-sediment and sediment-sediment interactions using several closures for the sediment phase. The effective viscosity is one such closure that includes three adjustable parameters: the intrinsic viscosity, the maximum viscosity, and the maximum packing concentration of unconsolidated sediment. The sensitivity of suspended sediment concentration predictions by SedMix3D is tested by varying the intrinsic viscosity, which is a proxy for sediment grain shape. We qualitatively and quantitatively analyze the model output of suspended sediment concentration for a range of intrinsic viscosity values typical of quartz sand. Intrinsic viscosity values ranging from 2.5 to 3.5 produce total suspended sediment concentrations that differ less than 11%. However, there is approximately a 16% difference between the suspended sediment concentrations from intrinsic viscosity values of 2.5 to 3.5 and 4.0 to 5.0. Simulations of sediment transport over bedforms performed here were not significantly sensitive to the choice of an intrinsic viscosity value in the range of 2.5 to 3.5. Using a baseline intrinsic viscosity value of 3.0, we subsequently tested two additional effective viscosity formulations. The suspended sediment concentrations predicted by the Eilers and Krieger-Dougherty formulations were very similar, but the Mooney formulation generated much less suspended sediment. We found the model to be more sensitive to variations of effective viscosity in the ripple-fluid interface than in the suspension range.","PeriodicalId":119977,"journal":{"name":"OCEANS 2009","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132501280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

A performance comparison of MAC protocols for underwater networks using a realistic channel simulator 基于真实信道模拟器的水下网络MAC协议性能比较

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422249

F. Guerra, P. Casari, M. Zorzi

{"title":"A performance comparison of MAC protocols for underwater networks using a realistic channel simulator","authors":"F. Guerra, P. Casari, M. Zorzi","doi":"10.23919/OCEANS.2009.5422249","DOIUrl":"https://doi.org/10.23919/OCEANS.2009.5422249","url":null,"abstract":"Large-sized underwater testbed deployments still pose a number of challenges, first of all the cost of the nodes and of the deploying ships. Therefore, simulation becomes an important tool for the assessment of network performance, and a precious aid to protocol, topology, and deployment design. However, simulations are significant only if the reproduction of acoustic propagation is accurate. To this end, we have joined two well known tools for simulation, namely Bellhop (for acoustic propagation modeling through ray tracing) and ns2-MIRACLE (an event-based network simulator). These tools, together, provide a flexible and customizable environment, fostering more realistic reproduction of propagation, PHY-level behavior, as well as the detailed specification of medium access control, routing, and higher-level protocols. In this paper, we describe our tool, and give an example of its employment in the comparison of three MAC protocols for underwater networks over different kinds of physical layers. The protocols have been specifically chosen to shed some light on the relationship between the complexity of a protocol and the amount of coordination it enables among nodes: in other words, our results show when it is better to rely on plain random access, and when on some form of handshaking (despite the usually greater complexity of handshake-based protocols).","PeriodicalId":119977,"journal":{"name":"OCEANS 2009","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132533952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

The ocean observatories initiative: Scientific investigation in a changing ocean from anywhere on Earth 海洋观测站倡议:从地球上任何地方对不断变化的海洋进行科学调查

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422424

Shelby Walker, T. Cowles

{"title":"The ocean observatories initiative: Scientific investigation in a changing ocean from anywhere on Earth","authors":"Shelby Walker, T. Cowles","doi":"10.23919/OCEANS.2009.5422424","DOIUrl":"https://doi.org/10.23919/OCEANS.2009.5422424","url":null,"abstract":"Sponsored by the U.S. National Science Foundation, the Ocean Observatories Initiative (OOI) (Fig. 1) has the potential to revolutionize ocean science. Its 24/7 telepresence will capture climate, carbon, ecosystem, and geodynamic changes on the time scales on which they occur, rather than when research vessels are able to be in the area. Data streams from the air-sea interface through the water column to the seafloor will be openly available to educators and researchers in any discipline, making oceanography available to citizens and scholars who might never go to sea. The unique, sustained, time-series data sets provided by the OOI will enable researchers to study complex, interlinked physical, chemical, biological, and geological processes operating throughout the global ocean. The science drivers motivating the OOI include the ocean carbon cycle and its response to global change, ocean acidification, the impact of climate variability on ocean circulation, coastal ocean dynamics and ecosystem response, and the impact of tectonically driven fluid flow on the carbon cycle, deep ocean ecosystems and earthquakes. The magnitude and mechanisms of air-sea exchange, the fundamental processes that control turbulent ocean mixing on all scales and the biophysical consequences thereof, and the impact of plate tectonics on the sea floor and society underpin these topics.","PeriodicalId":119977,"journal":{"name":"OCEANS 2009","volume":"545 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134273639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Illustrative visualization techniques for hurricane advisory information 飓风咨询信息的图解可视化技术

OCEANS 2009 Pub Date : 2009-10-01 DOI: 10.23919/OCEANS.2009.5422400

C. Steed, T. Jankun-Kelly, J. E. Swan

引用次数: 5