Dr. Cheng Li

University of Michigan

 

邀请人 ：陈曦 研究员

 

2024年5月24日（周五）10:00

3号楼1218会议室 

 

报告摘要:

The computational fluid dynamics on a sphere is relevant to global simulations of geophysical fluid dynamics. Using the conventional spherical-polar (or lat-lon) grid results in a singularity at the poles, with orders of magnitude smaller cell sizes at the poles in comparison to the equator. To address this problem, we developed a new general circulation model with a gnomonic equiangular cubed-sphere configuration. This model is developed based on the Simulating Nonhydrostatic Atmospheres on Planets (SNAP) model, using a finite volume numerical scheme with a Riemann-solver-based dynamic core and the vertical implicit correction (VIC) scheme. We present standard tests including cloud resolving simulations, 2D shallow-water modeling and 3D general circulation tests, for Earth, Jupiter and hot Jupiters. We also discuss the scientific discoveries resulted from the simulations.

 

报告人简介:

李成，2011年本科毕业于北京大学，同年赴美攻读博士研究生。2017年在加州理工获得博士学位。毕业后自2017年至2020年先后在美国宇航局喷气动力学实验室（NASA Jet Propulsion Laboratory）和加州大学伯克利分校从事研究工作。2021年加盟密西根大学安娜堡分校担任助理教授。李成主要从事行星大气与天文流体力学的研究。结合实验观测、理论计算与数值模型方法，研究气态行星中的大气热运动、辐射以及光化学过程。参与美国宇航局卡西尼（Cassini）土星探测和朱诺号木星探测的研究。从事研究工作以来，在Nature，Science，Nature Astronomy，Nature Geoscience和PNAS等国际期刊上发表论文多篇。曾获得NASA Earth and Space Science Fellowship和Heising-Simons 基金会的51 Pegasi b Fellowship等国际学术奖励和荣誉。