EARTHQUAKE EFFECT ON HYDROGEN SULFIDE CONTAMINATION OF THE BLACK SEA

A. Kh. Degterev

The data of concentration of hydrogen sulfide in the deep waters of the Black Sea are analyzed for the period of high seismic activity in June 1984. It is shown that the profiles of hydrogen sulfide with a few local extreme below 800 m and the reduced concentration at these depths are typical of that period. The profiles get their normal shape four months after a major earthquake. The obtained anomalies are related to the mixing processes in the weakly stratified waters resulting from a vertical bottom shifts. The thickness of the mixing layer is determined as a function of the shift rate and water stratification. It is concluded that at the rates of about 1 m×s-1 hydrogen sulfide can penetrate into the aerobic layer.

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