Ocean University of China held the 4th International Symposium on Polar Oceans and Global Change from May 24 to 25. A total of more than 120 scientists and graduate students from 9 foreign universities and research institutes and 27 domestic units gathered in Qingdao and the cloud to talk about the academic frontier. Lin Xiaopei, Dean of the School of Ocean and Atmospheric Sciences of Ocean University of China, and Huang Fei, Vice Dean, attended the opening ceremony.

The opening ceremony of the conference was presided over by Professor Chen Xianyao, Deputy Director of the Key Laboratory of Physics and Ocean Education of Ocean University of China, and Dean Lin Xiaopei delivered a welcome speech. Lin Xiaopei first extended a warm welcome to the arrival of global polar research scholars. He introduced the background, achievements and contributions of Ocean University of China in the field of polar research, and emphasized that in the face of the challenges brought about by the rapid changes in the polar regions, the international academic community needs to deepen cooperation with a more open attitude, jointly promote the leap from phenomenon cognition to mechanism interpretation and prediction and early warning, contribute to the construction of a community with a shared future for the ocean, and finally wish the conference a complete success.

After the opening ceremony, five internationally renowned scholars were invited to give keynote

 speeches. Academician Zhang Renhe of Fudan University deeply analyzed the internal correlation between the Arctic amplification effect and the contrast between land and sea temperature difference at high latitudes in winter, and quantitatively revealed the important contribution of sea and land temperature difference to Arctic warming through the trend change of the two waves of atmospheric constant waves in the latitude direction. Based on a variety of observational data, Shigeto Nishino, a researcher at the Japan Marine Geoscience and Technology Agency, expounded on the reshaping effect of Arctic Ocean circulation variation on the marine environment at the boundary of Atlantic and Pacific water masses. Professor Ruediger Stein of the University of Bremen in Germany reconstructed the evolutionary history of Arctic ice sheet-sea ice-organic carbon burial through the Late Cenozoic sedimentary records, and looked forward to the response trend under future climate scenarios. Professor Chen Gang of the University of California, Los Angeles proposed a mid-latitude surface temperature variability attribution model based on the wet energy framework, which provides a new perspective for the study of the change mechanism of extreme cold and warm events in the context of climate warming. Cheng Bin, a senior researcher at the Finnish Institute of Meteorology, shared the parametric scheme of the MOSAiC ice station drift trajectory simulation of snow-sea ice thermodynamic processes in combination with the practice of Arctic scientific expeditions.

The theme of this conference is The Changing Arctic Ocean: Mechanisms, Impacts and Predictions, and researchers from Canada, the United States, Finland, Norway, Germany, South Korea, Japan and China focused on the physical process of the restless Arctic Ocean, Arctic amplification and extreme events, Arctic sea ice observation and simulation, and the biogeochemical cycle process and mechanism of the Arctic Ocean. and actively discussed data sharing, model optimization, and interdisciplinary collaborative research.

Representatives of teachers and students from the School of Oceanography and Atmosphere, the Key Laboratory of Physics and Ocean Education of the Ministry of Education, the Laboratory of Marine Chemistry Theory and Engineering Technology, and the Department of Information Science and Engineering attended the meeting. By building an international exchange platform, the conference further strengthened our country's international discourse in the field of polar research and contributed Chinese wisdom to promoting global ocean governance.

Correspondent: Wang Xiaowei Shi Jiuxin