How methane is released from the sea and the specificity of methane emissions from the South China Sea

In this video, the professor discusses the sources of methane in natural waters, including biogenic, thermogenic, and puregenic origins. He explains that methane is produced through the decomposition of organic carbon in Antarctic environments and highlights the vertical distribution of methane in the western Philippine Sea and South China Sea. The professor also mentions the presence of methane hydrates, which can store significant amounts of methane. Research findings indicate high methane concentrations in certain areas, such as near the upper continental slope, where organic carbon-rich sediments are present. The professor emphasizes the importance of incorporating scientific research on methane emissions into coastal management frameworks.

Review questions:

• In this video, the professor mentions different origins of methane in natural waters. What are the three main sources mentioned, and how do they contribute to methane emissions?
• What are some of the factors influencing the distribution of methane concentrations in the western Philippine Sea and South China Sea, as discussed by the professor?