Topic: Synergic Effects of the Tibetan Plateau and Tropical Ocean on the Interannual Variability of the EASM
Lecturer: Prof. Anmin Duan
(State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences (CAS))
Time: 14:00 PM March 15, 2019 (Friday)
Venue: Lecture Hall D103, School of Atmospheric Sciences (SAS)
Report Summary: Asia and its surrounding areas are embraced by the highest topography, the warmest ocean and the strongest monsoon system in the world, representing one of the most active regions in the global land–sea–air interaction. The East Asian summer monsoon (EASM) is affected by many external forcing factors, including ocean, land, the Tibetan Plateau, ice and snow, bearing complex interannual variability. Based on station observations, reanalysis data, satellite radiation data and the regular surface observations, the data on the interannual variability of the surface and atmospheric heat sources/sinks over the plateau are picked up. By means of diagnostic analysis and numerical modeling of the data, this study sheds light on the relative contributions and interaction of the Tibetan Plateau thermal forcing and the dominant mode of the tropical ocean’s interannual variability [such as the El Niño–Southern Oscillation (ENSO) and Indian Ocean basin mode (IOBM)], to the onset, propulsion and intensity of the EASM. It deepens the understanding of key approaches and physical processes, proposing a physical conceptual model on the synergic effects of the plateau and the tropical ocean on the interannual variability of the EASM, which provides a scientific basis for a comprehensive understanding of the plateau land-air coupled system affecting the monsoon and global climate change.
Brief Introduction of the Lecturer: Prof. Duan Anmin is mainly engaged in the study of climate effect and land–sea–air interaction in the Tibetan Plateau. Between 2006 and 2007, he conducted the post-doctoral research at the Graduate Institute of Hydrological and Ocean Sciences in National Central University, where he constructed a coupled model of atmospheric circulation-oceanic mixed layer, by which he identified the main physical processes of the local air-sea interaction over the Indo-Pacific warm pool affecting the onset of Asian monsoon. Furthermore, he put forward and proved the significance of local air-sea coupling to overcome the double ITCZ Problem of atmospheric circulation model and its mechanism. For the first time, he adopted observational data to quantitatively calculate the trend of atmospheric heat sources over the Tibetan Plateau, figuring out that the uneven distribution of global warming varying with latitude was the main reason for the weakening of the sensible heat air pumping in the plateau. He has presided over several key and general projects of The National Natural Science Foundation of China (NSFC), the National "973 Program", and has participated in the major research plan organized by the NSFC as well as key projects of knowledge innovation program from the CAS. He has won many awards and honors including "Zhao Jiuzhang Science Award for Young and Middle-aged" and "The National Science Fund for Distinguished Young Scholars". He has published more than 90 papers, of which over 70 have been included by SCI with over 2200 times of citation.