报告题目：Nitrification at the gas-liquid interface: Mechanistic modelling of reactive N gas emissions from drying soils

报告人：Minsu Kim

报告时间：2025年8月6日（周三） 10:40--11:30

报告地点：研究生楼718会议室

欢迎广大师生届时参加！

报告人简介：

Minsu Kim，环境系统物理学专家，主要从事土壤与大气界层等环境系统研究。博士毕业于瑞士苏黎世联邦理工学院，期间在 Dani Or 院士指导下构建旱地生物结衣模型。曾担任瑞士联邦材料科学与技术研究所“大气建模/遥感”团队博士后研究员，开发高分辨率卫星空气污染观测模型。目前就职于奥地利格拉茨大学，主要开展土壤、大气和人类活动互作效应及其对生物地球化学循环的影响研究，涉足卫星观测数据人工智能分析、土壤碳氮循环微生物驱动机制等领域。研究工作融合物理学、环境科学和人工智能技术，致力于解决复杂环境系统问题。在Nature Communications，Nature Physics，Cell 等期刊发表论文30余篇。

报告摘要：

Soil microorganisms are recognized as significant contributors to nitrogen gas emissions, including the highly reactive nitrogen oxides (NOx) and nitrous acid (HONO). These gases are of considerable interest in atmospheric chemistry due to their crucial roles in influencing atmospheric oxidative capacity. However, existing research on soil emissions of NOx and HONO has largely been empirical and the underlying mechanisms remained speculative. In this talk, I will present a mechanistic modelling approach to investigate the biotic and abiotic processes during nitrification under controlled conditions. Using this model in conjunction with laboratory experiments, we examined mechanisms driving microbially produced NO and HONO emissions in drying soils. Our research identified interlinked biotic and abiotic processes, i.e., the protonation of nitrite under alkaline conditions and the partitioning of NO and HONO, that are driven by water loss through evaporation. We suggest that the drying process may obscure the distinction between aerobic and anaerobic soil conditions, underlining the necessity for further investigation into the detailed metabolic pathways under dynamic hydration conditions and microbial homeostasis against the toxic accumulation of N compounds within small pore spaces.

资源与环境学院

2025年8月1日