scholarly journals Detection of ferromagnetic objects in local magnetic anomaly of the Baltic Sea

2008 ◽  
Vol 15 (2) ◽  
pp. 77-82 ◽  
Author(s):  
Mirosław Wołoszyn
Keyword(s):  
Magnetic Field ◽  
Mathematical Model ◽  
Baltic Sea ◽  
Magnetic Anomaly ◽  
Magnetic Anomalies ◽  
Mobile Platforms ◽  
The Baltic Sea ◽  
Magnetic Systems ◽  
The Baltic ◽  
The Mathematical Model

Detection of ferromagnetic objects in local magnetic anomaly of the Baltic Sea In geological researches several kinds of methods are applied to discovering the natural resources. Planes, helicopters and UAVs (UnmAnned Vehicle) are used in researches in large areas. The gravity, electromagnetic and magnetic methods, which are used in geological researches, are presented in this paper. The special attention was paid to magnetic systems installed on mobile platforms. The magnetic field of the Earth obtained from mathematical model was compared to the real magnetic field in the selected part of the Baltic Sea. The results of the calculations showed that the mathematical model of the Earth's magnetic field does not consider local magnetic anomalies. The strong local magnetic anomalies cause serious problems with detection of underwater objects. Special problems appear in the magnetic system on a helicopter, which are presented in this paper.

Variational assimilation of observation data in the mathematical model of the Baltic Sea dynamics

2015 ◽  
Vol 30 (4) ◽  
Author(s):  
Valeriy I. Agoshkov ◽  
Eugene I. Parmuzin ◽  
Vladimir B. Zalesny ◽  
Victor P. Shutyaev ◽  
Natalia B. Zakharova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Heat Flux ◽  
Baltic Sea ◽  
Satellite Observation ◽  
Sea Surface ◽  
Observation Data ◽  
The Baltic Sea ◽  
Variational Assimilation ◽  
The Baltic ◽  
The Mathematical Model

AbstractA mathematical model of the dynamics of the Baltic Sea is considered. A problem of variational assimilation of sea surface temperature (SST) data is formulated and studied. Based on variational assimilation of satellite observation data, an algorithm solving the inverse problem of heat flux restoration on the interface of two media is proposed. The results of numerical experiments reconstructing the heat flux functions in the problem of variational assimilation of SST observation data are presented. The influence of SST assimilation on other hydrodynamic parameters of the model is considered.

Forecasting Watercooling in the Kattegat, the Öresund, the Belt Sea and the Arkona Basin

1987 ◽  
Vol 18 (4-5) ◽  
pp. 247-258
Author(s):  
Anders Omstedt
Keyword(s):  
Mathematical Model ◽  
Surface Water ◽  
Simulated Data ◽  
Diagnostic Study ◽  
Water Cooling ◽  
The Baltic Sea ◽  
Starting Point ◽  
Arkona Basin ◽  
The Baltic ◽  
The Mathematical Model

Some problems associated with forecasting water cooling in the entrance to the Baltic Sea are examined, using a diagnostic study from the severe ice winter of 1986/87 as a starting point. In the study, measured and numerically simulated data demonstrate that surface water cooling can be well simulated with the mathematical model presented by Omstedt (1987). Forecast tests during the same winter also indicate that the model may provide useful forecast information. However, because of the limited numbers of temperature and salinity profile measurements, the forecasts had to be accomplished with diagnostic calculations. These calculations will then produce the necessary initial data for the forecasts.

The effectiveness of marine magnetic surveying for mapping the location of anthropogenic objects in the Baltic Sea

2017 ◽  
Vol 32 (1) ◽  
pp. 58-65
Author(s):  
Maria Kubacka ◽  
Agnieszka Brzezińska ◽  
Łukasz Gajewski
Keyword(s):  
Magnetic Field ◽  
Baltic Sea ◽  
Magnetic Field Intensity ◽  
Magnetic Data ◽  
The Baltic Sea ◽  
Sea Bottom ◽  
Measurement Results ◽  
Local Sources ◽  
The Baltic ◽  
Sea Area

The aim of the paper is to present the use of marine magnetic surveying for mapping the location of anthropogenic objects on or buried in the seabed. The main purpose of collecting magnetic data is to detect local sources of increased magnetic field intensity, and to indicate the presence of ferromagnetic objects in the investigated area. The work contains the results of researches carried out in the Baltic Sea area by the Maritime Institute in Gdansk. Hydromagnetic surveys are implemented mainly in the framework of pre-investment studies in order to inventory objects in the sea bottom, which can hinder the construction of subsea installations or affect the technological process of construction. Based on the interpretation of measurement results the occurrence of anthropogenic objects such as wrecks, linear objects (e. g. gas pipelines, cables, trawl wires) or munitions can be determined.

Temporal and spatial sedimentation rate variabilities in the eastern Gotland Basin, the Baltic Sea

Boreas ◽  
2002 ◽  
Vol 31 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Christian Christiansen ◽  
Helmar Kunzendorf ◽  
Kay-Christian Emeis ◽  
Rudolf Endler ◽  
Ulrich Struck ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Sedimentation Rate ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
Temporal And Spatial ◽  
The Baltic

Russian Oil: Production and Exports

2003 ◽  
pp. 136-146
Author(s):  
K. Liuhto
Keyword(s):  
Baltic Sea ◽  
Statistical Data ◽  
Oil Production ◽  
The Baltic Sea ◽  
North West ◽  
The North ◽  
Oil Transportation ◽  
Sea Ports ◽  
The Baltic

Statistical data on reserves, production and exports of Russian oil are provided in the article. The author pays special attention to the expansion of opportunities of sea oil transportation by construction of new oil terminals in the North-West of the country and first of all the largest terminal in Murmansk. In his opinion, one of the main problems in this sphere is prevention of ecological accidents in the process of oil transportation through the Baltic sea ports.

Paleoecological study of bottom sediments of the lake Goluboye (Karelian Isthmus) according to the results of diatom analysis

2019 ◽  
pp. 265-269
Author(s):  
Angelina E. Shatalova ◽  
Uriy A. Kublitsky ◽  
Dmitry A. Subetto ◽  
Anna V. Ludikova ◽  
Alar Rosentau ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Bottom Sediments ◽  
Modern Science ◽  
Karelian Isthmus ◽  
The Baltic Sea ◽  
Diatom Analysis ◽  
North West ◽  
The North ◽  
Important Direction ◽  
The Baltic

The study of paleogeography of lakes is an actual and important direction in modern science. As part of the study of lakes in the North-West of the Karelian Isthmus, this analysis will establish the dynamics of salinity of objects, which will allow to reconstruct changes in the level of the Baltic Sea in the Holocene.

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)

2008 ◽  
Vol 37 (4) ◽  
Author(s):  
Małgorzata Leśniewska ◽  
Małgorzata Witak
Keyword(s):  
Baltic Sea ◽  
The South ◽  
Gulf Of Gdańsk ◽  
The Baltic Sea ◽  
Southern Baltic Sea ◽  
Gulf Of Gdansk ◽  
Southern Baltic ◽  
The Baltic ◽  
Palaeoenvironmental Changes

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)The palaeoenvironmental changes of the south-western part of the Gulf of Gdańsk during the last 8,000 years, with reference to the stages of the Baltic Sea, were reconstructed. Diatom analyses of two cores taken from the shallower and deeper parts of the basin enabled the conclusion to be drawn that the microflora studied developed in the three Baltic phases: Mastogloia, Littorina and Post-Littorina. Moreover, the so-called anthropogenic assemblage was observed in subbottom sediments of the study area.

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