Evolution of Small Scale Filaments in an Adaptive Advection Model for Idealized Tracer Transport

• Main Authors: J. Behrens, K. Dethloff, W. Hiller, A. Rinke
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1998
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.54.7944; http://www-m3.mathematik.tu-muenchen.de/m3/ftp/GRLPaper.ps.gz

We investigate the formation of small scale filaments in a novel adaptive tracer transport model. The numerical model is based on a semi-Lagrangian advection scheme, and an adaptively and locally refined triangular mesh. The adaptive modelling approach allows very high local resolution, showing fine grained filamentation under the influence of background wind shear. Wind data for the tracer transport experiment are taken from the high-resolution regional climate model for the Arctic atmosphere, HIRHAM. The influence of horizontal resolution and changed radiation parameterization on the tracer transport has been investigated. We conclude recommending a minimum grid resolution of 15 km and properly chosen physical parameterizations in driving wind data for high-resolution tracer transport modelling. 2 1. Introduction The perturbed chemistry within the polar stratospheric vortex has generated great interest in the corresponding dynamics. The atmospheric distribution of trace constitue.