On May 7, China's 37th Antarctic Expedition Team, with associate researcher Zhao Jun of the Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources as the chief scientist, successfully completed various expedition tasks and returned to the domestic base terminal on the "Xuelong 2", associate researcher Li Dong, Yang Xufeng and assistant researcher Zhu Yuanli participated in the entire voyage.

      During the 179-day polar expedition, researchers from SIO obtained basic biochemical data such as multi-site and full-depth nutrients, dissolved oxygen, and chlorophyll, as well as the marine biological and chemical samples of particulate organic carbon, pigment and primary productivity in the euphotic layer in Antarctic waters such as Prydz Bay, Astronaut Sea, Antarctic Peninsula and Amundsen Sea, and successfully deployed 4 sets of submersible buoy systems for comprehensive observation of marine biogeochemistry.

      Among the deployed submersible buoy systems, some are equipped with dual sediment traps for the first time to observe the vertical transport process of settled particles, and some are used to observe the fertilization effects of natural iron on the Antarctic marine ecosystem. With diverse parameters for observation, it is planned to be recovered in China's 38th Antarctic expedition voyage.

      The seawater samples collected by the ocean survey and the long-term series data recorded by the submersible buoy observation will help to study the operating efficiency and change laws of the biological pumps in the sea area, and further reveal the interaction principle between the physical-chemical change process and ecosystem in the key polar sea areas significantly affected by climate change. It has important scientific value and practical significance to deeply understand the Southern Ocean ecosystem and global climate change.