Title: Three-Dimensional Morphological Modeling of Fresh Impact Craters on the Lunar Surface

Speaker: Du Jun, Researcher, National Space Science Center, Chinese Academy of Sciences

Time: 10:00, Tuesday, 20 October

Venue: Large Meeting Room, 3rd Floor

Tencent Meeting: 498-253-602

Abstract:

The morphology of fresh impact craters on the lunar surface reflects the physical properties of the impactor and the lunar surface, and thus has important implications for understanding the formation process of impact craters. Previous morphological studies of lunar impact craters have usually been conducted within an axisymmetric geometric assumption, and therefore cannot capture the detailed textural features of crater morphology. In contrast, topographic spectral analysis is a more powerful morphological research tool, as it can reveal morphological variations of impact craters at different spatial scales. This talk will introduce how to calculate the one-dimensional power spectral densities of the continuous ejecta blanket, crater rim, and crater floor boundaries of fresh lunar impact craters, as well as the two-dimensional power spectral densities of the elevations of the continuous ejecta blanket, crater wall, and crater floor. Based on the obtained topographic power spectral densities of impact craters, simulated fresh lunar impact craters with realistic textural features were generated and integrated into the lunar surface terrain evolution model CraterMaker. At the end of the talk, future applications of CraterMaker will be discussed.

Speaker Biography:

Du Jun is a researcher at the National Space Science Center, Chinese Academy of Sciences, and has long been engaged in research on planetary surface geological processes. He received his bachelor's degree from Chengdu University of Technology in 2013 and his doctorate from Peking University and the Observatoire de la Côte d'Azur, France, in 2020. From 2020 to 2024, he conducted postdoctoral research at the National Space Science Center, Chinese Academy of Sciences, and Purdue University in the United States. Dr. Du Jun has published 9 first-author papers in journals such as GRL, JGR, PSJ, and Science China. He is currently leading a major project sub-topic of the National Natural Science Foundation of China, a General Program project, and a youth project under the Chinese Academy of Sciences Talent Introduction Program, and serves as a key member in the National Natural Science Foundation of China Innovative Research Group Project (Category B) and a strategic research special project.