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Department of Geosciences official Weibo live broadcast and Tencent meeting (ID: 38511800485) Tsinghua University

 


Brief Introduction of the Lecture:

 

Since the Industrial Revolution, human activities have continuously emitted greenhouse gases, resulting in the imbalance of energy budget of the earth system, the systematic change of global energy and water cycle, and leaving a deep mark in the ocean. The ocean stores more than 90% of the energy of global warming, which is manifested as ocean warming. At the same time, ocean salinity leads to the change of atmospheric water cycle, which makes the systematic change of ocean salinity. Therefore, it is a basic direction of ocean climate change and variability research to use observation data to monitor the changes of ocean physical field and explore the changes of energy and water cycle of the earth system. The report will begin with a description of the key role played by the oceans in the global energy imbalance and water cycle, and a systematic presentation of the history and current status of past in situ ocean temperature and salinity observation systems and data. Recent data and studies are also presented, which reveal variations in global ocean temperature (heat content), salinity and their three-dimensional spatial structures, which also provide quantitative estimates of energy imbalances in the Earth system and changes in the water cycle. Finally, the report will also check the effectiveness of mainstream climate models in simulating changes in ocean subsurface temperature and salinity based on observational data.

 

Brief introduction of the presenter:

Cheng Lijing, associate researcher at the Institute of Atmospheric Physics, Chinese Academy of Sciences, received his doctorate from the Institute of Atmospheric Sciences in 2014. He is mainly focused on the research of ocean climate change facts, ocean heat budget, energy and water cycle. A set of global ocean temperature and salinity grid data was constructed by him, which was used by 20 international comprehensive assessment reports such as IPCC, WMO, FAO and more than 100 academic papers. He has more than 40 SCI papers have been published, including Science Advances (ESI highly cited), Science (Perspective), Nature Climate Change, Nature and so on, with a total citation of more than 1900 times. The research results were selected as the top ten scientific and technological progress of China's oceans and lakes in 2017 and 2019. From 2017 to 2019, he was the main author of IPCC ocean and cryosphere report; From 2018 to 2020, he was the main author of the second round of the United Nations Global Ocean Assessment. Since 2019, he has been a member of CLIVAR Global Integrated Observing Committee (GSOP), a member of the Steering Group of the International Temperature and Salinity Profile Project (GTSPP), and a member of the Data Advisory Committee (WDAC) of the World Climate Research Program (WCRP). He has won Xie Yibing Youth Science and Technology Talents Award and WCRP/GCOS International Data Award (International Data Prize).

 

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