Influx of Streaming Methane into Anoxic Waters of the Black Sea Basin

Abstract

Based on long-term data on the spatial distribution and fluxes of streaming (bubbling) methane in the Black Sea, the study considers various types of streaming gas emissions contributing to the methane content in the anoxic zone of the Black Sea. The estimate for the annual influx of methane gas emissions to the methane budget in the Black Sea was 1.2 × 10⁹ m³ or 0.9 Tg, which is significantly less than the estimates obtained by biogeochemical methods (2.30–5.65 Tg yr^–1).