Scientists Discover Methane Emissions from South China Sea Cold Seeps Far Exceed Previous Estimates
Deep-sea cold seeps are key channels for seafloor methane, but quantifying their emissions has been challenging, creating uncertainties in the global ocean methane budget. To fill this knowledge gap, a research team from the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) has found that methane emissions from South China Sea cold seeps far exceed previous estimates, providing important scientific evidence for the accounting of oceanic greenhouse gas sources and sinks.
Jan 22, 2026