Sediment source to sink process and controlling mechanism from the Bengal Bay to the East Siberian Sea of Asian continental margin

The Asian continental margin is located at the convergence and collision boundary of the Eurasian, Pacific and Indo-Australian plates, and is subjected to the strongest land-sea interactions and the most frequent exchanges of material and energy. The rivers in the Asian continental margin contributes about two-thirds of the global sediments from rivers to the ocean, which has a great impact on the sedimentation, biogeochemical processes and marine ecology of the marginal seas and the global oceans. Through international cooperation, we have studied the sediment source to sink system and paleoenvironment in the Asian continental margin from the East Siberian shelf in the north to the Bay of Bengal in the south. We compiled a serial of sediment type map with different scales of the Asian continental margin, and elaborated the distribution pattern of the sediments; We established a set of effective provenance tracing index system to elucidate the properties of fluvial sediments, identified the sediments provenance in Bay of Bengal, east China seas, Sea of Japan, and East Siberian Sea, described the transport and deposition processes of the fluvial sediment in the sea, and established the sedimentation model for the key areas; The source, input mode and burial of organic carbon on the shelf at different latitudes and their response to natural processes and human activities have been quantitatively evaluated; The controlling mechanism of sediment source-sink process impacted by the Asian monsoon, sea level change, uplift of Tibetan Plateau, sea current and sea ice variations has been revealed.