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Number of results: 9
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Abstract

An analysis of seismic shocks from the Heer Land and the Nordaustlandet was made (shocks recorded by the Hornsund seismological station). Kinematic models and synthetic seismograms were constructed. A system of horizontal discontinuities located in the upper mantle was assumed. A good agreement between observational data from the seismograms and theoretical results was obtained.
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Abstract

The distribution of earthquake foci around the Hornsund fiord, south Spitsbergen, suggest the presence in this region of a micronode of geotectonic structures, exhibiting moderate dynamic activity. Dislocation description was applied to the processes of motion of the glacier and crack formation. Long-period seismic waves generated by the glacier-substratum dynamic system and impulses generates by icebergs seated on the sea bottom have been discussed.
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Abstract

Contents of PCBs was investigated using the gas chromatography method in the tissue of four Antarctic migratory birds: Oceanites oceanicus, Larus dominicanus, Catharacta skua and Sterna vittata, and the three penguin species: Pvgoscelis adeliae, P. papua and P. antarctica. Samples were collected at King George Island in February 1978 and, for comparison, in March 1983. The highest PCBs content was recorded in the adipose tissue of O. oceanicus and C. skua (15.7 and 1.2 ppm). Differences in the content of these compounds in the tissue of various penguin species in 1978 was observed. The mean cumulation level of PCBs in the adipose tissue of penguins was higher in 1983 than in 1978. Differences in the level of PCBs contents in the tissue of migratory birds were related to their winter migrations to areas polluted to various degress with PCBs remains. A tendency to the increase of the contamination of penguin tissues with PCBs was observed. This tendency was related to the increase of vhe pollution of the Antarctic environment with these compounds.
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