A new Chemical Lagrangian Model of the Stratosphere (CLaMS) 1. Formulation of advection and mixing

摘要: [1] Recent satellite observations and dynamical studies have demonstrated the existence of filamentary structures in chemical tracer fields stratosphere. It is also evident that such features are often below spatial resolution highest-resolution Eulerian models been used up to present time. These motivated development a novel Chemical Lagranigan Model Stratosphere (CLaMS) based on Lagrangian transport tracers. The description CLaMS divided into two parts: Part 1 (this paper) concentrates dynamics, i.e., calculation trajectories completely new mixing algorithm dynamically adaptive grid, while part 2 describes integration initialization procedure. different air masses driven by large-scale horizontal flow deformation takes account mass exchange between nearest neighbors determined Delaunay triangulation. Here we formulate an isentropic, two-dimensional version model verify using distributions measured during space shuttle CRISTA-1 experiment where highly resolved stratospheric were observed early November 1994. A comparison Southern Hemispheric N2O distribution with results allows intensity simulated be optimized. long-term robustness scheme investigated case study 1996–1997 Northern Hemisphere polar vortex. This further provides framework for investigations arctic ozone destruction discussed 2.