Abstract
A spherical spectral viscosity operator is proposed as an alternative to standard horizontal diffusion terms in global atmospheric models. Implementation in NCAR's Spectral Transform Shallow Water Model and application to a suite of standard test cases demonstrates improvement in resolution and numerical conservation of invariants at no extra computational cost. The retention in the spectral viscosity solution of high-wavenumber information allows the successful application of high-resolution postprocessing methods.
Original language | English (US) |
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Pages (from-to) | 2346-2360 |
Number of pages | 15 |
Journal | Monthly Weather Review |
Volume | 129 |
Issue number | 9 |
DOIs | |
State | Published - 2001 |
ASJC Scopus subject areas
- Atmospheric Science