Methane Fluid Discharge Measurements by the Trap Method in Laspi Bay (Black Sea)

Malakhova, T.V.; Budnikov, A.A.; Ivanova, I.N.; Murashova, A.I.

Авторы: Malakhova T.V., Budnikov A.A., Ivanova I.N., Murashova A.I.
Журнал: Moscow University Physics Bulletin
Том: 75
Номер: 6
Год издания: 2020
Издательство: Allerton Press
Местоположение издательства: New York, N.Y., United States
Первая страница: 705
Последняя страница: 711
DOI: 10.3103/s0027134920060132
Аннотация: Measurements of the methane fluid discharge from bottom sediments and daily monitoringof the main hydrophysical parameters near the site of the bubble jet gas discharge (seeps) in Laspi Bay have been carried out. Fluid flow values varied by an order of magnitude (1.4–74.3 mmol/m2day) at points separated by a distance of no more than 10 m. It is assumed that denser carbonate deposits at the seepage site can localize gas flows, thus reducing the volume of fluid discharge. It is shown that thespecific fluid discharge in Laspi Bay is comparable with the flow from point seeps; the maximum fluid flowis only 3.5 times lower compared to the minimum recorded seep flow. Changes in hydrological parametersabove the gas release point are significantly influenced by waves. The maximum change in salinity duringmeasurements was 0.08%o, which indicates that there is no high-rate freshwater submarine discharge,which often accompanies seeps. Episodes of an abrupt decrease in oxygen content with an amplitude of 0.5mg/l at night, which are not related to changes in water temperature and meteorological conditions, maybe caused by the seepage of hydrogen sulfide in the bubble and fluid gases.
Добавил в систему: Иванова Ирина Николаевна

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Methane Fluid Discharge Measurements by the Trap Method in Laspi Bay (Black Sea)статья