Europe Oceans 2005最新文献_第5页

A model for predicting propagation of anthropogenic acoustic noise in the sea 海洋中人为噪声传播的预测模型

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511728

C. B. Pedersen, J. Hovem, H. Dong

{"title":"A model for predicting propagation of anthropogenic acoustic noise in the sea","authors":"C. B. Pedersen, J. Hovem, H. Dong","doi":"10.1109/OCEANSE.2005.1511728","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511728","url":null,"abstract":"There is a growing environmental concern about the effect high level anthropogenic acoustic signals and noise can have on the life in sea in general, also noise in the form of transients signal generated by air guns used in marine seismic exploration. The signals from such air guns have the potential to travel to far distances and cause annoyance, discomfort or damage to, for instance, sea mammals. Effects could range from mild irritation through impairment of foraging or disruption of social interactions to hearing loss and in extreme cases physical injury or death. It is therefore of considerable interest to have tools for the predictions of long range sound propagation of air gun signals to use in the planning and execution of surveys. In this paper we will describe a new environmental impact analysis model for the prediction of the level and other characteristics of emitted man made acoustic noise in the sea. The main element of the model is an acoustic ray-tracing propagation program, called PlaneRay, which can treat range dependent bathymetry and take into account reflection loss from a layered sea floor with fluid and elastic layers. The sound source in the propagation model can be any transient acoustic waveform, for instance a recorded acoustic signature of an air gun. The model will then propagate the source signal out to a range of several kilometers and calculate the sound level as function of frequency for a large frequency band, typically 1000 Hz. The model will also calculate the complete broad-band time response of the received signal and thereby calculate important parameters, such as the peak-to-peak acoustic pressure amplitude, rms pressure level and time duration of the received signal. The main features of the model are described and examples of predicting long range propagation of an air gun signature under different oceanic conditions are shown.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121347588","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: 1

Automatic classification for MCM systems MCM系统的自动分类

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513166

I. Quidu, N. Burlet, J. Malkasse, F. Florin

引用次数: 7

Comparison between sea surface features from ocean color imagery and 3D modeling in the Gulf of Lions (Northern Mediterranean Sea) 地中海北部狮子湾海洋彩色影像与三维建模海面特征对比研究

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513208

G. André, P. Forget, P. Garreau, P. Fraunié

{"title":"Comparison between sea surface features from ocean color imagery and 3D modeling in the Gulf of Lions (Northern Mediterranean Sea)","authors":"G. André, P. Forget, P. Garreau, P. Fraunié","doi":"10.1109/OCEANSE.2005.1513208","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513208","url":null,"abstract":"The signature of the Gulf of Lions (GoL) surface dynamics by SeaWiFS measurements of chlorophyll (Chl) is addressed in this paper. A chain of three nested models based on the MARS-3D code is used to simulate the Northwestern Mediterranean Sea circulation. This modeling network allows to resolve the GoL dynamics taking into account the influence of the general basin circulation (Northern Current). A good qualitative agreement between Chl and modeled salinity fields was generally obtained. From SeaWiFS images and according to the model results, the Rho/spl circ/ne water masses can follow the coasts to the west of the river mouth or can be expelled southward in the western part of the GoL. Along the continental slope, the Northern Current (NC) channels the Rho/spl circ/ne river dispersion plume up to the Catalan coasts. In bloom condition the localization of the oligotrophic vein corresponds accurately to the NC position. Small scale dynamics observed on chlorophyll fields are generally reproduced by the model. However they can be misplaced on MARS-3D results because of the difficulties to simulate these small scale processes and the too coarse resolution of wind forcing. Finally, the quantitative pixel/pixel comparisons between the Chl fields and the computed surface salinity fields show a high scattering due to the misplacement of features. Nevertheless, two clear trends was observed, corresponding to the southwestward and the along coast direction of the Rho/spl circ/ne river plume.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116591590","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: 1

Scientific application of advanced underwater positioning techniques 先进水下定位技术的科学应用

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513224

N. Randazzo, C. Bechaz

引用次数: 1

The effects of the dimensions, the shape and the speed of the ship on the pressure distributions in surrounding sea water 船舶的尺寸、形状和航速对周围海水压力分布的影响

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513256

N. Alexe

{"title":"The effects of the dimensions, the shape and the speed of the ship on the pressure distributions in surrounding sea water","authors":"N. Alexe","doi":"10.1109/OCEANSE.2005.1513256","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513256","url":null,"abstract":"Presented in this paper are numerical method used to study of viscous flow around a ship hull, numerical simulations and obtained results, to establish the effects of dimensional and movement parameters of the ship on the pressure distributions in surrounding sea water. In this numerical scheme, the three-dimensional viscous flow around an advancing ship is computed by the finite-difference method, the viscous flow is simulated for ships of a displacement type and the free surface effects are neglected. The governing equations are the Navier-Stokes equations and the continuity equation for the three-dimensional incompressible fluid. The body-fitted curvilinear coordinates system is introduced to cope with the body boundary of an arbitrary form. Assuming symmetricity of a flow field, only the half side of the center plane is solved. The computational region in the physical space is transformed into the parallelepiped in the computational space. The body boundary is usually transformed onto a plane in the computational space, which enables the simple treatment of boundary conditions. Viscous flows around a variant hull of the Wigley model are computed by the present scheme. In order to investigate the influences of dimensional and movement parameters of the ship on pressure distributions in sea water, the following parameters were varied systematically: the model speed, the main dimensions of the model, and the displacement, respectively, the model length, the value of the block coefficient, the value of the longitudinal prismatic coefficient and the value of the ratio of breadth to depth.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121482901","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: 1

PortMap: a VHF ocean surface radar for high spatial resolution PortMap:一种高空间分辨率的甚高频海面雷达

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511767

M. Heron, T. Helzel, A. Prytz, M. Kniephoff, W. Skirving

引用次数: 6

Comparison of multisensor fusion methods for seabed classification 多传感器融合海底分类方法比较

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513172

D. Kerneis, B. Zerr

引用次数: 1

Study of the influence of the sea surface on the observability of a man-made target in SAR images 海面对SAR图像中人造目标可观测性影响的研究

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513219

V. Gras, M. Lamy

引用次数: 1

Enhancing bottom tracking for AUVs by using sound diffraction 利用声衍射增强水下机器人的底部跟踪

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511679

Vincent Creuze, B. Jouvencel, P. Baccou

引用次数: 0

Developing observing system products for coastal management: applying surface current monitoring to coastal ocean management 开发海岸管理观测系统产品:将海流监测应用于海岸海洋管理

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513229

P. Siri, B. Heneman, S. Schuchat, S. Semans, B. Smyth

{"title":"Developing observing system products for coastal management: applying surface current monitoring to coastal ocean management","authors":"P. Siri, B. Heneman, S. Schuchat, S. Semans, B. Smyth","doi":"10.1109/OCEANSE.2005.1513229","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513229","url":null,"abstract":"Implementation of California's Coastal Ocean Currents Monitoring Program (COCMP: http://cocmp.org) requires technical, organizational and institutional milestones to provide products useful for managing coastal resources in a state with an 1800 km coastline. COCMP is the first large-scale, integrated, high frequency radar system and, as such, a candidate component for the proposed national Integrated Ocean Observing System (IOOS: http://www.ocean.us/). HF radar is an efficient and economically viable initial step in creation of an observing technology capable of providing a range of products. Its applications include water quality management, oil spill response, marine protected area development, marine and anadromous fisheries management, and search and rescue operations. Developing a functional surface currents monitoring program in a state as large, environmentally diverse, and politically fragmented as California is a test of creating institutional linkages and communications where none exist. Creating timely and useful products to serve resource management agency, NGO, and industry constituencies requires dedicated outreach and educational tools, a challenge that is as important as the technical design. The authors review COCMP technical design, outreach, integration, and applications.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132634373","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: 1