2008 IEEE/OES US/EU-Baltic International Symposium最新文献_第7页

Effect of dumped chemical weapon on the Baltic Sea microbiota 倾倒化学武器对波罗的海微生物群的影响

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625499

N. Medvedeva, Y. Polyak, I. Kuzikova

{"title":"Effect of dumped chemical weapon on the Baltic Sea microbiota","authors":"N. Medvedeva, Y. Polyak, I. Kuzikova","doi":"10.1109/BALTIC.2008.4625499","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625499","url":null,"abstract":"Seawater contamination with mustard gas and its derivatives substantially affects marine microorganisms. The mustard gas hydrolysis products (MGHPs) cause depletion of the species composition of microbiocenosis, as suggested by decreases in the Shannon and Pielou indices and the increase in the dominance index. Significant ecological shifts manifested as the decrease in the similarity indices. Decreased bacterial diversity suggests growth of a tolerant opportunistic species. From among bacterial cultures tolerant to mustard gas hydrolysis products the MGHPs-degrading microorganisms were isolated. The isolates were identified as Flavobacterium, Alcaligenes, Bacillus, or Pseudomonas spp. The main properties of these microorganisms are the tolerance to MGHPs, and the ability to utilize thiodiglycol. MGHPs-degrading bacteria can use mustard gas hydrolysis products as the sole source of carbon and energy at the organochlorine substances and thiodiglycol concentrations up to 240 mg/l and 6 g/l, respectively. The results suggest a potential for MGHPs biodegradation by natural occurring populations of near-bottom water and sediment microorganisms. Reduction in the species diversity of the marine microbiota suggests a decrease in the stability of the biosystem as a whole.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89569812","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: 2

Spatial variation in high-speed ferry wakes in the Tallinn Bay area 塔林湾地区高速轮渡尾迹的空间变异

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625570

T. Torsvik

{"title":"Spatial variation in high-speed ferry wakes in the Tallinn Bay area","authors":"T. Torsvik","doi":"10.1109/BALTIC.2008.4625570","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625570","url":null,"abstract":"A large number of high-speed ferry crossings occur in the Tallinn Bay area during the summer season. It is well known that the wakes from such ferries constitute a considerable additional wave load to the coastal region, with different properties from wind generated waves and waves from conventional ships. Waves in this area have been studied with the use of pressure sensors at particular locations, and provide valuable data for assessing the ship wave component of the wave load. Recent numerical simulations show that there is considerable spatial variation in the wave load at the coast due to topographic effects and ship maneuvering. This results in wave focusing and shadow areas on different parts of the coast. It is therefore believed that the previous studies may have missed some ldquohotspotsrdquo for the coastal wave impact. We analyze spatial patterns and far field properties of the long-wave part of wakes of fast ferries in Tallinn Bay with use of the Boussinesq-type shallow-water model COULWAVE forced by realistic ship motions. The calculated heights of ship waves exhibit substantial spatial variability. The largest waves were created when the ship sailing to Tallinn entered into supercritical regime when moving over the coastal slope. The maximum wave height eventually reached 3 m whereas along other sections of the track the wave height was about 1 m. The highest waves hit the area of Pirita Beach that apparently has much larger ship wave loads than the adjacent sections of the Viimsi Peninsula.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"3 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89624853","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

Estimates of eddy diffusivity in bottom boundary layer of the Bornholm Deep 博恩霍尔姆深底边界层涡动扩散系数的估计

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625548

V. Paka, V. Zhurbas

{"title":"Estimates of eddy diffusivity in bottom boundary layer of the Bornholm Deep","authors":"V. Paka, V. Zhurbas","doi":"10.1109/BALTIC.2008.4625548","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625548","url":null,"abstract":"Reliable estimate of eddy diffusivity in the bottom boundary layer (BBL) of the Bornholm Deep is the issue of practical importance because it would control dispersion of the chemical warfare agents dumped in the Deep after WW II [Helcom, 1994]. The most common way to arrive at an estimate of the eddy diffusivity, K is to apply a well-known parameterization of mixing in the Baltic halocline due to internal wave instability suggested by [A. Stigebrandt, 1987] K = min(Kmax, alpha/N), where Kmax is the maximum value of K, N is the buoyancy frequency, and alpha =1times10-7 m2 s-2 [H.E.M. Meier, 2007] or alpha = 0.87times10-7 m2 s-2 [H.-U. Lass, 2003] is the empirical constant. Taking NBBL =0.02 s-1 for near-bottom layer and Nhalocline =0.03 s-1 for the halocline in the Bornholm Deep [J. Elken, 1996] one obtains KBBL= 0.5times10-5 m2 s-1 and Khalocline = 0.33times10-5 m2 s-1. However, the above estimate of KBBL does not take into account the possibility of enhancement of eddy diffusivity in BBL due shear instability of the near-bottom current and a variety of mechanisms of boundary mixing [J.H. Reissmann, 2007]. Numerical simulations based on the Princeton Ocean Model with a second and a half moment turbulence closure by Mellor and Yamada [1982] embedded brought for eddy diffusivity in the Bornholm Deep BBL and the BBL thickness the values of KBBL1= 2.5times10-4 m2 s-1 and hBBL1 = 2 m respectively. Eddy diffusivity in the Bornholm Deep BBL can be also estimated using data of tow-yo CTD profiling in a near-bottom layer performed aboard R/V Shelf in Summer 2006.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"58 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88711070","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

Waves, currents and their relationships with coastal processes near Kelba Spit (Saaremaa Island) on the basis of RDCP measurements 基于RDCP测量的Kelba Spit (Saaremaa Island)附近波浪、洋流及其与海岸过程的关系

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625525

U. Suursaar, A. Kont, T. Kullas, K. Orviku, R. Rivis, H. Tõnisson

{"title":"Waves, currents and their relationships with coastal processes near Kelba Spit (Saaremaa Island) on the basis of RDCP measurements","authors":"U. Suursaar, A. Kont, T. Kullas, K. Orviku, R. Rivis, H. Tõnisson","doi":"10.1109/BALTIC.2008.4625525","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625525","url":null,"abstract":"A 5-month long record on currents, waves and other hydrological variables was obtained by means of Recording Doppler Current Profilers (RDCP) 1.5 km off the Kelba spit of Saaremaa Island over a period from December 2006 to May 2007. A parallel study of coastal changes was based on orthophotos and the measurements of beach ridges, as well as on the GPS measurements made in 2005, 2006 and 2007 to identify changes in the shoreline and scarp contours and positions. The results suggest that the major changes in coastline at Harilaid Peninsula occur mainly during infrequent but strong storms, e.g. such as the January storm (Gudrun) in 2005. During the measurement period, a strong storm event occurred, too. At Vilsandi station, the maximum wind speed reached 23 m/s (gusts up to 33 m/s) on 15 January 2007 and the maximum sea level at Ristna tide gauge reached 171 cm. The RDCP mooring site fell into accumulation zone, where downward fluxes dominated and fine sand settled. The currents at the RDCP location were not large, but the significant wave height reached 3.2 m in the 14 m deep mooring site and the maximum wave height was 4.6 m. It appeared that in Estonian coastal waters, the Doppler-based vertical velocity measurements reflect the site-dependent equilibrium between resuspension and sedimentation. The GPS measurements taken between summers 2005, 2006 and 2007 show that the tip of the Kelba spit has shifted from north back to north-east. As a result of the single storm, the distal part of the spit has advanced by 50-60 m and its area has increased by 4500 m2. At Cape Kiipsaare, as it also has happened during previous large storms, a clear retreat of the shoreline in the western, north-western (30-50 meters), and north-eastern parts has occurred.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"46 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87816615","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

Comprehensive estimation of marine economy and resource potential of coastal region 沿海地区海洋经济与资源潜力综合评价

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625489

G. Gogoberidze

引用次数: 3

Transport of sediments resuspended by ferries 由渡船重新悬浮的沉积物的运输

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625546

A. Erm, V. Alari, T. Kõuts

引用次数: 3

Sub-regional observing and forecast system for the NE Baltic: Needs and first results 波罗的海东北部分区域观测和预报系统:需要和初步成果

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625551

J. Elken, T. Kõuts, P. Lagemaa, U. Lips, U. Raudsepp, G. Väli

引用次数: 5

To be on the right path from BOOS to an integrated pan-European marine data management system 在正确的道路上，从bos到一个综合的泛欧海洋数据管理系统

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625562

K. Soetje

{"title":"To be on the right path from BOOS to an integrated pan-European marine data management system","authors":"K. Soetje","doi":"10.1109/BALTIC.2008.4625562","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625562","url":null,"abstract":"In order to maximise the benefit from existing national and European resources in operational oceanography the existing EU- wide marine observation systems have to be integrated in order to harmonise the flow of real time and near real time observational data. Using well defined standards, the EU-projects ECOOP (European coastal-shelf sea operational and forecasting program)and SeaDataNet design and implement an European data management system (EDMS) which is able to follow the developments of the EU- projects MERSEA, and SEP RISE, taking into account the upcoming methods of the INSPIRE directive. The EDMS is designed to ensure proper and maximum real time and near real time delivery of observational data pan-European wide, including river run-off data and real time delivery of remote sensing data. The quality of real time and near real time observational data is ensured by a series of protocols regulating the operational activity from collection, data transmission, evaluation, and dissemination. The EDMS is intending to be a high level service for the exchange of observational data avoiding diversity in data management systems for upcoming projects. It will be a basis for the EU marine observation and data network (EMODNET) following the \"Integrated Maritime Policy for the European Union (\"The Blue Book\"). The paper will give an impression of the techniques, the metadata interface, the common vocabulary and the connection to the information system to be used to come up from the BOOS data management system to a pan-European solution.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"177 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75386266","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: 2

Air-Sea Interaction Profiler: Autonomous upper ocean measurements 海气相互作用剖面仪:自主上层海洋测量

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625494

B. Ward, T. Fristedt

引用次数: 10

Microbial indicators of contamination of water and sediments by warfare agents in Baltic Sea dump sites 波罗的海垃圾场战剂对水和沉积物污染的微生物指标

2008 IEEE/OES US/EU-Baltic International Symposium Pub Date : 2008-05-27 DOI: 10.1109/BALTIC.2008.4625500

Y. Polyak, N. Medvedeva, T. Zaytseva

{"title":"Microbial indicators of contamination of water and sediments by warfare agents in Baltic Sea dump sites","authors":"Y. Polyak, N. Medvedeva, T. Zaytseva","doi":"10.1109/BALTIC.2008.4625500","DOIUrl":"https://doi.org/10.1109/BALTIC.2008.4625500","url":null,"abstract":"Our research revealed changes in the composition of the Baltic Sea microbial populations, namely, an increase in numbers of the physiological group of microorganisms that develop owing to organic compounds contaminating chemical weapon dump sites. We found that mustard gas hydrolysis products (MGHPs) - tolerant microorganisms were predominant in nearbottom water in many stations in the Baltic Sea dumping areas. The proportion of this group of indicator bacteria both in the total number of microorganisms and the amount of heterotrophic bacteria tended to increase. Comparison of the number of the indicator bacteria with the total number of heterotrophs allowed estimating the degree of contamination of marine ecosystem and characterizing the response of microbiota to the effect of warfare agents. Microbiological investigations revealed the concentration of MGHPs-tolerant microorganisms up to 20 - 98% of total number of heterotrophs in Gotland Deep, Strait of Skagerrack and Bornholm Basin. The ldquoabnormalrdquo sites characterized with a poor spectrum of heterotrophic microorganisms. At some stations the dominance of minimal number of species in near-bottom waters was observed. The species diversity of the microbial population in the dump sites was reduced because of an increase in the number of MGHPs-tolerant microorganisms. Thus, high number of microorganisms tolerant to MGHPs in near-bottom waters indicates possible leaking of CW agents into the environment and contamination of water and sediments with mustard gas and products of its hydrolysis in dumping areas.","PeriodicalId":6307,"journal":{"name":"2008 IEEE/OES US/EU-Baltic International Symposium","volume":"2 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2008-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80922755","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