We present diagnostics of the large-scale mixing of stratospheric flows for January 2000 using meteorological analyses produced by the GEOS-3 system of the Data Assimilation Office (DAO) at NASA Goddard Space Flight Center (GSFC), the European Centre for Medium-Range Weather Forecasts (ECMWF), and the Met Office (METO). To characterize the mixing properties of these numerical weather prediction (NWP) systems we calculate diffusion coefficients, contour lengthening rates, and equivalent mixing lengths. Qua…
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