Lagrangian Approach for Studying Stratospheric Flows during Sudden Stratospheric Warming Events
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The aim of this work is to study both the dynamics and the structure of the major Sudden Stratospheric Warming (SSW) on the northern hemisphere that took place in January 2021 with the help of Lagrangian Descriptors (LD). SSWs are known to increase the likelihood of cold extremes over eastern U.S., northern Europe, and Asia, making them particularly relevant for numerical weather prediction. We use this context to study the capabilities of LD. In particular, we explore the effect of the dataset's resolution on the position of the Lagrangian Coherent Structures (LCS), which are geometric boundaries in fluid flows used to understand the organization and transport of fluid particles.