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일시: 2026년 1월 15일 (목) 10:30 - 11:20

장소: 27동 116호 

연사:  Quanling Deng  (Yau Mathematical Sciences Center, Tsinghua University)

발표제목:   Sea Ice Multiscale Modeling: From Particle to Kinetic to Hydrodynamic Descriptions with an Application to Data Assimilation

This talk focuses on multiscale modeling of sea ice dynamics, linking particle, kinetic, and hydrodynamic descriptions of sea ice floes. Motivated by the perspective of Hilbert’s sixth problem, we develop a particle–continuum framework that systematically bridges microscopic floe interactions and macroscopic sea ice behavior. Starting from a kinetic formulation for floe particles, continuum hydrodynamic equations are derived through the BBGKY hierarchy, capturing the statistical structure and large-scale evolution of the system, as well as its coupling with ocean dynamics. Within this multiscale modeling setting, we briefly present data assimilation as an application, introducing a Lagrangian–Eulerian Multiscale Data Assimilation (LEMDA) framework built on the underlying particle–continuum hierarchy. The talk concludes with a short outlook on current efforts to incorporate realistic data into multiscale sea ice modeling and assimilation.