Zijing Forum of Global Change Science, the 398th Session

Topic: Simulating Mesoscale Convective System (MCS) with the global convective resolving climate model

Speaker: Professor Lin Guangxing

Institute of Atmospheric Physics, Chinese Academy of Sciences

Time: 10: 00-11: 30, December 7, 2022 (Wednesday)

Live Streaming at Official Weibo of the Department of Earth System Science, Tsinghua University Tencent Conference (ID: 134 271 437)

Introduction to the Lecture:

The Mesoscale Convective System (MCS) is an important system causing such damaging weather as rainstorm, hail, gale and tornado. MCS is not only an important source of precipitation, but also its latent heat will significantly affect the atmospheric circulation, and therefore it is also an important part of the climate system. However, MCS has always been a weakness and difficulty of climate model simulation because its spatial and temporal range spans multiple scales. At present, the traditional global climate model with cumulus convection parameterization is weak in simulating convection and precipitation process, with great uncertainty, unable to capture MCS. Therefore, this report will introduce the research and development of a new global convective resolvable climate model E3SM-MMF and its application in MCS simulation. By analyzing the specific MCS cases and the average climate state in central America, it has been found that E3SM-MMF is more accurate than the traditional climate model (E3SM) in simulating the number of MCSs in spring and summer, the daily cycle of precipitation, the probability distribution of precipitation and the eastward movement. The report will also further analyze the reasons why E3SM-MMF outshines E3SM, and discuss the difference of MCS formation mechanisms between spring and summer in central America.

Profile of the Speaker:

Lin Guangxing, Researcher/Doctoral Supervisor, International Center for Climate and Environment Sciences (ICCES), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, Winner of National High-level Youth Program. He has obtained his bachelor's degree and master's degree from Peking University, and a doctor's degree from the University of Michigan. He used to be a postdoctoral fellow and researcher at the Pacific Northwest National Laboratory (PNNL) of the U.S. Department of Energy. He has been engaged in the research and development and application of aerosol-Earth system model for a long time, and has rich experience in the development and application of Earth system model. His main research directions are aerosol physical chemistry, aerosol-cloud-climate interaction, convective precipitation, development and application of high-resolution earth system model, etc.

Email: linguangxing@mail.iap.ac.cn