2014 IEEE/OES Baltic International Symposium (BALTIC)最新文献_第7页

Current measurement by differential acoustic travel-time reviewed 差分声走时电流测量综述

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887869

A. J. Williams

{"title":"Current measurement by differential acoustic travel-time reviewed","authors":"A. J. Williams","doi":"10.1109/BALTIC.2014.6887869","DOIUrl":"https://doi.org/10.1109/BALTIC.2014.6887869","url":null,"abstract":"Since 1977 papers have been published and talks presented about measurement of fluid flow by differential acoustic travel-time. The technique is older than these publications but a compilation of these will serve as a research source for understanding the development of the technique through 2014. The earliest papers describe the differential acoustic travel-time technique as applied to a free-fall shear meter and then to a boundary layer array. Next are the benthic boundary layer studies that gave rise to the BASS tripods and their application to the deep-sea sediment transport problem. Deep-sea applications transitioned to shelf depths and the combination of waves and current in estimates of bottom stress. Studies of the upper boundary layer used bottom tripods suspended from surface floats or mounted on tower legs to study air-sea interaction and mixing under waves in the surface boundary layer. Free drifting velocity sensing arrays were deployed to study internal diapycnal mixing. There are a series of papers about Richardson number measurements from RiNo floats. Finally the development of a compact single-point sensor based upon the differential acoustic travel-time technique is described in papers that progress through analyses of performance and enhancements as well as applications of the Modular Acoustic Velocity Sensor, MAVS.","PeriodicalId":435850,"journal":{"name":"2014 IEEE/OES Baltic International Symposium (BALTIC)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124634956","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

In situ measurements of cardiac activity characteristics in indigenous macrobenthic invertebrates for water quality bioindication 用于水质生物指示的本土大型底栖无脊椎动物心脏活动特征的原位测量

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887864

S. Kholodkevich, T. Kuznetsova

引用次数: 5

How to differentiate between coastal cooling and upwelling events on SST images? 如何区分海温图像上的海岸冷却和上升流事件?

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887878

E. Esiukova, I. Chubarenko, A. O. Sinyukhin

{"title":"How to differentiate between coastal cooling and upwelling events on SST images?","authors":"E. Esiukova, I. Chubarenko, A. O. Sinyukhin","doi":"10.1109/BALTIC.2014.6887878","DOIUrl":"https://doi.org/10.1109/BALTIC.2014.6887878","url":null,"abstract":"We aim to find on MODIS (Aqua, Terra) SST-pictures of the South-Eastern Baltic those characteristic features, which allow to distinguish the differential coastal cooling from the coastal upwelling events, even though their manifestations look much alike. The basis is data of MODIS (Aqua, Terra) spectroradiometers for 2000–2013. We analyze horizontal SST-profiles above coastal slopes under conditions of autumnal cooling and during well known upwelling events. The SST profiles above slopes are formed as a result of joint contribution of heat exchange with the atmosphere and horizontal transport of heat from the sea. Satellite images of October-November, corresponding to the periods of well pronounced decrease in air temperature (with time rate of change as large as 0.86–2.54 C/day) were analyzed. Typical shape of the profiles, demonstrating the presence of differential coastal cooling over the distance of 10–20 km from the shore, allows for allocation of the region where thermocline meets the slope, what gives (for the given bathymetry) an information on current thickness of the upper mixed layer (UML). Shape of the SST profile is quite conservative, not sensitive to both the steepness of the bottom slope, bathymetry peculiarities, and intensity of cooling and even wind conditions, indicating that sea-shelf heat exchange is in general close to the steady state. The SST drop from open to coastal area is about 2–3 °C and does not depend on the thickness of the UML or the steepness of the slope. On the other hand, about 90 events of coastal upwelling in May-November 2000–2013 in South-Eastern Baltic were selected and the features of the horizontal SST-profiles above the same coastal slopes were analyzed. It appeared that the shape of the SST-profiles demonstrates the presence of upwelling quite definitely, what allows for effective differentiation from the coastal cooling effects.","PeriodicalId":435850,"journal":{"name":"2014 IEEE/OES Baltic International Symposium (BALTIC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131563078","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: 5

Visually observed wave climate in the Gulf of Riga 目测里加湾波浪气候

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887829

M. Eelsalu, M. Org, T. Soomere

{"title":"Visually observed wave climate in the Gulf of Riga","authors":"M. Eelsalu, M. Org, T. Soomere","doi":"10.1109/BALTIC.2014.6887829","DOIUrl":"https://doi.org/10.1109/BALTIC.2014.6887829","url":null,"abstract":"The basic properties of wave fields in the Gulf of Riga, the third largest semi-enclosed sub-basin of the Baltic Sea, are evaluated using recently digitized records of coastal visual wave observations from the island of Ruhnu (57°47' N, 23°15'32” E) in the central part of the gulf and from a site near the south-eastern tip of the Sõrve Peninsula site (57°54'04“ N, 22°03'28” E) for 1954-2011. The basic features of the wave climate in the Gulf of Riga are similar to those in other parts of the Baltic Sea. The long-term average wave heights are relatively low, about 0.5 m at Ruhnu and 0.35 m at Sõrve. Waves are shorter than in several other parts of the Baltic Sea: the typical periods are 3-4 s at Ruhnu and below 3 s at Sõrve. The annual course of wave heights at Ruhnu is more pronounced than in the open parts of the Baltic Sea but this course at Sõrve is relatively modest. The data sets reveal no distinct trend in the annual mean wave heights. While the Ruhnu data set exhibits extensive interannual and decadal variations in the wave height, the observations from Sõrve (that is much more sheltered against waves exited by predominant winds) show no substantial variations. The correlation between annual mean wave heights at these two sites and with data from the open Baltic Sea coast is modest. The results reflect substantial anisotropy of the wave climate of the Gulf of Riga that has relatively large wave intensity in its central and eastern regions.","PeriodicalId":435850,"journal":{"name":"2014 IEEE/OES Baltic International Symposium (BALTIC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132238137","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: 7

An estimate of the impact of vessel wakes on coastal processes: A case study for Aegna, Estonia 船舶尾迹对沿海过程影响的估计:爱沙尼亚埃格纳岛个案研究

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887859

K. Pindsoo, M. Eelsalu, T. Soomere, H. Tõnisson

引用次数: 3

Advances in fisheries applications of remote sensing 渔业遥感应用进展

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 2014-05-27 DOI: 10.1109/BALTIC.2014.6887836

V. Klemas

{"title":"Advances in fisheries applications of remote sensing","authors":"V. Klemas","doi":"10.1109/BALTIC.2014.6887836","DOIUrl":"https://doi.org/10.1109/BALTIC.2014.6887836","url":null,"abstract":"During the past four decades the fisheries productivity of the world has been declining due to pressures from overfishing, habitat change, pollution, and climate change. Sustainable use of marine resources requires effective monitoring and management of the world's fish stocks. Remote sensing techniques are being used to help manage fisheries at sustainable levels, while also guiding fishing fleets to locate fish schools more efficiently. Fish tend to aggregate in ocean areas that exhibit conditions favored by specific fish species. Some of the relevant oceanographic conditions, such as sea surface temperature, ocean color (productivity) and oceanic fronts, which strongly influence natural fluctuations of fish stocks, can be observed and measured by remote sensors on satellites and aircraft. The remotely sensed data are provided in near-real time to help fishermen save fuel and ship time during their search for fish; to modelers who produce fisheries forecasts; and to scientists who help develop strategies for sustainable fisheries management. This article describes how acoustic, optical and radar sensors on ships, satellites and aircraft are used with forecast models to improve the management and harvesting of fisheries resources.","PeriodicalId":435850,"journal":{"name":"2014 IEEE/OES Baltic International Symposium (BALTIC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126987080","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

How to differentiate between coastal cooling and upwelling events on SST images? 如何区分海温图像上的海岸冷却和上升流事件?

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 1900-01-01 DOI: 10.1109/baltic.2014.6887839

E. Esiukova, I. Chubarenko, A. O. Sinyukhin

{"title":"How to differentiate between coastal cooling and upwelling events on SST images?","authors":"E. Esiukova, I. Chubarenko, A. O. Sinyukhin","doi":"10.1109/baltic.2014.6887839","DOIUrl":"https://doi.org/10.1109/baltic.2014.6887839","url":null,"abstract":"We aim to find on MODIS (Aqua, Terra) SST-pictures of the South-Eastern Baltic those characteristic features, which allow to distinguish the differential coastal cooling from the coastal upwelling events, even though their manifestations look much alike. The basis is data of MODIS (Aqua, Terra) spectroradiometers for 2000-2013. We analyze horizontal SST-profiles above coastal slopes under conditions of autumnal cooling and during well known upwelling events. The SST profiles above slopes are formed as a result of joint contribution of heat exchange with the atmosphere and horizontal transport of heat from the sea. Satellite images of October-November, corresponding to the periods of well pronounced decrease in air temperature (with time rate of change as large as 0.86-2.54 C/day) were analyzed. Typical shape of the profiles, demonstrating the presence of differential coastal cooling over the distance of 10-20 km from the shore, allows for allocation of the region where thermocline meets the slope, what gives (for the given bathymetry) an information on current thickness of the upper mixed layer (UML). Shape of the SST profile is quite conservative, not sensitive to both the steepness of the bottom slope, bathymetry peculiarities, and intensity of cooling and even wind conditions, indicating that sea-shelf heat exchange is in general close to the steady state. The SST drop from open to coastal area is about 2-3°C and does not depend on the thickness of the UML or the steepness of the slope. On the other hand, about 90 events of coastal upwelling in May-November 2000-2013 in South-Eastern Baltic were selected and the features of the horizontal SST-profiles above the same coastal slopes were analyzed. It appeared that the shape of the SST-profiles demonstrates the presence of upwelling quite definitely, what allows for effective differentiation from the coastal cooling effects.","PeriodicalId":435850,"journal":{"name":"2014 IEEE/OES Baltic International Symposium (BALTIC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128475779","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

Space-derived parameters of coastal upwelling in the SE Baltic Sea 波罗的海东南部沿海上升流的空间参数

2014 IEEE/OES Baltic International Symposium (BALTIC) Pub Date : 1900-01-01 DOI: 10.1109/baltic.2014.6887883

Toma Mingėlaitė, I. Dailidienė, I. Kozlov

引用次数: 1