Weather Regimes and Preferred Transition Paths In a Three-Level . . .
Multiple flow regimes are reexamined in a global, three-level, quasi-geostrophic model with realistic topography in spherical geometry. This QG3 model, using a T21 triangular truncation in the horizontal, has a fairly realistic climatology for Northern Hemisphere winter, and exhibits multiple regime...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2003
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.8.4770 http://www.atmos.ucla.edu/tcd/PREPRINTS/KGIpaper.pdf |
| Summary: | Multiple flow regimes are reexamined in a global, three-level, quasi-geostrophic model with realistic topography in spherical geometry. This QG3 model, using a T21 triangular truncation in the horizontal, has a fairly realistic climatology for Northern Hemisphere winter, and exhibits multiple regimes that resemble those found in atmospheric observations. Four regimes are robust to changes in the classification method, k-means vs. mixture modeling, and its parameters. These regimes correspond roughly to opposite phases of the Arctic Oscillation (AO) and the North Atlantic Oscillation (NAO), respectively. The Markov |
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