Морской экологический журнал. - 2010. - Т. 9, № 2.
Постоянная ссылка на коллекцию
Поиск
Поиск Морской экологический журнал. - 2010. - Т. 9, № 2. по ключевым словам "поверхность раздела между кислородными и сероводородными водами"
Сейчас показывается 1 - 1 из 1
Результаты на странице
Настройки сортировки
Материал Variability of oxic/anoxic conditions over the fields of methane seeps at the NW Black Sea shelf slope(2010) Gulin, M. B.; Stokozov, N. A.CTD data, H2S water column samples and detailed bathymetric survey of the underwater Dnieper paleo-delta were analyzed to study of temporal and spatial fluctuations of oxic/anoxic interface over the gas seepage area, where methane-related microbial mats and carbonate reefs are highly developed. Time-series CTD measurements have allowed to estimate temporal variability of the isopycnal surfaces with sigma-theta ()values 15.4 (oxycline encased with the permanent pycnocline) and 16.2 (oxic/anoxic interface). In the investigated region quasi-periodical vertical fluctuations of the H2S-waters upper boundary ( = 16.2) between 130 and 165 m depths, i.e. up to 35 meters, have been observed. At the area of massive microbial reefs within this depths range a seabed slope angles have been changed from 1.5o to 13.0o. Accordingly, a specific belt–like zone of periodic near-bottom water redox-changes could to cover a great distance across the shelf slope – up to 1100 m. In view of fact that microbial control of methane oxidation and control of CH4-fluxes it can be both aerobic or anaerobic process, it should to influence on the type, pathways and activity of microbial oxidation of methane within the gas seep fields.