BalticaPub Date : 2013-12-11DOI: 10.5200/BALTICA.2013.26.19
D. Bagočius
{"title":"Underwater noise generated by the detonation of historical ordnance in the Baltic Sea, Lithuania: potential ecological impacts on marine life","authors":"D. Bagočius","doi":"10.5200/BALTICA.2013.26.19","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.19","url":null,"abstract":"The removal of ordnance and ammunition followed by high levels of impulsive noise is implemented yearly in the Lithuanian area of the Baltic Sea. During the international naval exercise Open Spirit (Summer 2013), an acoustical survey (using submersible cable hydrophone) was conducted in order to measure the underwater impulsive noise levels produced by controlled detonation and to assess their potential ecological impacts. The findings indicate a high noise energy level of explosions having a particularly small weight of charges, reaching up to 190 dB (in low-frequency bands) and theoretical estimations of the initial shock wave of 276 dB.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70647345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-12-11DOI: 10.5200/BALTICA.2013.26.20
R. Povilanskas, J. Satkūnas, Egidijus Jurkus
{"title":"Conditions for deep geothermal energy utilisation in southwest Latvia: Nīca case study","authors":"R. Povilanskas, J. Satkūnas, Egidijus Jurkus","doi":"10.5200/BALTICA.2013.26.20","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.20","url":null,"abstract":"This paper focuses on the deep geothermal energy utilisation from the Lower Cambrian sandy siltstone aquifer as a potential supply to the district heating system in Nīca, a small municipality in southwest Latvia. Based on this case study, we argue that it is technically and economically feasible to develop efficient geothermal heat stations in small municipalities rich in geothermal resources under three key preconditions: sufficient extractable heat resources of the aquifer; ready availability of a nearby deep well; and – a plan for environmentally acceptable disposal of the cooled geothermal water to the surface waters. If these conditions are met, the deep geothermal energy utilisation in a small-scale district heating system might be economically viable and possibly more sustainable than a larger district heating system, where high-pressure re-injection of the cooled geothermal water into deep rock aquifers is necessary.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-12-11DOI: 10.5200/BALTICA.2013.26.17
Jovita Mėžinė, P. Zemlys, S. Gulbinskas
{"title":"A coupled model of wave-driven erosion for the Palanga Beach, Lithuania","authors":"Jovita Mėžinė, P. Zemlys, S. Gulbinskas","doi":"10.5200/BALTICA.2013.26.17","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.17","url":null,"abstract":"A model of the coastline dynamics along the Palanga Beach, Lithuania is developed through coupling of the GENESIS software with the external wave model RCPWAVE that accounts for the recent bottom topography. Analysis of the calibration and verification results of the coupled model shows that it reproduces the coastline dynamics reasonably well and can serve as an effective tool for coastal management. The largest discrepancies between the observed and modelled behaviour of the coastline occur near the Rąžė River mouth.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70647368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-12-11DOI: 10.5200/BALTICA.2013.26.13
Gražyna Gryguc, D. Kisielienė, M. Stančikaitė, V. Šeirienė, Žana Skuratovič, Vykintas Vaitkevicius, Andrejus Gaidamavičius
{"title":"Holocene sediment record from Briaunis palaeolake, Eastern Lithuania: history of sedimentary environment and vegetation dynamics","authors":"Gražyna Gryguc, D. Kisielienė, M. Stančikaitė, V. Šeirienė, Žana Skuratovič, Vykintas Vaitkevicius, Andrejus Gaidamavičius","doi":"10.5200/BALTICA.2013.26.13","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.13","url":null,"abstract":"This paper presents new data describing the Holocene environmental history of the Briaunis pal aeolake, Eastern Lithuania. Shortly before 9600 cal yr BP, sedimentation began in an oligotrophic deepwater basin, whereas the Early Holocene instability of the environmental regime caused the influx of detrital sediment into the basin. A birch forest dominated in the surrounding landscapes, and at ca. 9600 cal yr BP, the spread of Ulmus, Alnus, Populus and Corylus began, suggesting a shortlived climatic amelioration. A subsequent drop of the water table and increasing influx of the terrigenous material continued from 9600 to 9300–9200 cal yr BP. The ensuing climatic stability caused the formation of a deciduous forest and the regional spread of Picea. Some instability, i.e. a decline in the thermophilous species, as well as the appearance of boreal and northern alpine diatoms, could be associated with the socalled “8.2 ka event”. This reversal was followed by ameliora tion and prospering of the water plants typical of the Holocene climatic optimum from 7900 to 7200–7100 cal yr BP. At aproximatelly 6600–6500 cal yr BP, a small rise of the water table was documented and bogforming processes dominated until ca. 3600–3400 cal yr BP, when a smallscale deepening of the basin occured.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-06-20DOI: 10.5200/BALTICA.2013.26.02
J. Harff
{"title":"Eugen Seibold – a promoter of European marine geology","authors":"J. Harff","doi":"10.5200/BALTICA.2013.26.02","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.02","url":null,"abstract":"","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-06-20DOI: 10.5200/BALTICA.2013.26.12
P. Zemlys, I. Dailidienė, Jevgenijus Zaboras
{"title":"An operational model for Lithuania's coastal zone","authors":"P. Zemlys, I. Dailidienė, Jevgenijus Zaboras","doi":"10.5200/BALTICA.2013.26.12","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.12","url":null,"abstract":"The results of testing (hindcast) an operational hydrodynamic model HIROMB_LT for Lithuania's coastal zone are presented and analysed in this paper. A model is developed using the program code of an opera- tional hydrodynamic model of the Baltic Sea HIROMB (Swedish Meteorological and Hydrological Institute). The model grid (horizontal resolution 300m, vertical resolution 25 layers) covers the Baltic Sea coastal area until the Gdansk Bay in the West and Latvian border in the North and the Curonian Lagoon. The model simu- lated water levels, surface water temperature surface water salinity and ice cover variables were tested against measurements for the year 2009. The model shows satisfactory performance on water level and temperature and rather weak performance on salinity at stations where good reproduction of the mixing of fresh and saline water is critical (Juodkrantė and Klaipėda seaside stations). The model performance on ice thickness is still problematic because of too coarse spatial resolution of westerly winds. Despite of these shortcomings, the model can be used for operational forecasts already; however, data assimilation may be necessary for salinity and ice thickness.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-06-20DOI: 10.5200/BALTICA.2013.26.07
Danguolė Karmazienė, B. Karmaza, V. Baltrūnas
{"title":"Glacial geology of North Lithuanian ice marginal ridge and surrounding plains","authors":"Danguolė Karmazienė, B. Karmaza, V. Baltrūnas","doi":"10.5200/BALTICA.2013.26.07","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.07","url":null,"abstract":"During the last decades many studies were concentrated on the North Lithuanian ice marginal ridge of the Last Glaciation (Late Nemunas, Late Weichselian). The North Lithuanian ice marginal ridge or so–called Linkuva ridge was formed by Žiemgala Ice Lobe that advanced at the end of the glaciation through the Gulf of Riga. This ridge is considered as a boundary of glacier limit during the North Lithuanian recessional phase of the Late Nemunas Baltija stage. Linkuva ridge is stretching about 130 km as a bow-shaped ridge and is marking the boundary of an active ice lobe. The thickness of Quaternary deposits is 10–12 meters on the average but varies from 1.0 to 39.0 meters: the thinnest Quaternary cover is characteristic for river valleys, whereas the thickest one is related with the highest altitudes of the present topography or with rare palaeoincisions of the sub–Quaternary surface. Pleistocene strata are subdivided to three till complexes in some places separated by inter–till sediments.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-06-20DOI: 10.5200/BALTICA.2013.26.05
D. Bagočius
{"title":"Underwater noise level in Klaipėda Strait, Lithuania","authors":"D. Bagočius","doi":"10.5200/BALTICA.2013.26.05","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.05","url":null,"abstract":"Underwater noise is an issue with rising importance in the Klaipėda Strait, as man-made activity grows in this area. The article presents methods and results of the first attempt to measure underwater noise in the Klaipėda Strait connecting the Baltic Sea and the Curonian Lagoon. Emphasis is placed on the background underwater noise in the area, where vessels traffic makes its general contribution to it. Dredging and vibro-pile driving noise have been studied as contributors to the background noise as well. Comparison of background noise in the Klaipėda Strait and an unaffected Curonian Lagoon area is given. Possible impacts of underwater noise on migrating fish species are shortly discussed.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BalticaPub Date : 2013-06-20DOI: 10.5200/BALTICA.2013.26.03
E. Seibold
{"title":"Der Grosse Belt in seiner Bedeutung für die rezenten Sedimente der Ostsee","authors":"E. Seibold","doi":"10.5200/BALTICA.2013.26.03","DOIUrl":"https://doi.org/10.5200/BALTICA.2013.26.03","url":null,"abstract":"","PeriodicalId":55401,"journal":{"name":"Baltica","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70646584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}