The ‘Warm-Arctic/Cold-Continents’ pattern during 1901-2010
The ‘Warm-Arctic/Cold-Continents’ (WACC) winter weather pattern is investigated using the European Centre for Medium-Range Weather Forecasts 20th Century reanalysis data (ERA20C) spanning 1901-2010. Both the 1920-1940 and 1990-2010 periods are characterized by Arctic amplification (AA) and mid-latit...
| Published in: | International Journal of Climatology |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2018
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| Subjects: | |
| Online Access: | https://eprints.lincoln.ac.uk/id/eprint/32149/ https://eprints.lincoln.ac.uk/id/eprint/32149/1/WACC_IJOC_201803.pdf https://doi.org/10.1002/joc.5725 |
| Summary: | The ‘Warm-Arctic/Cold-Continents’ (WACC) winter weather pattern is investigated using the European Centre for Medium-Range Weather Forecasts 20th Century reanalysis data (ERA20C) spanning 1901-2010. Both the 1920-1940 and 1990-2010 periods are characterized by Arctic amplification (AA) and mid-latitude continental cooling, although the Arctic warming signal for 1990-2010 is twice as strong as that for 1920-1940. Significant weakening in the mid-latitude poleward temperature gradient and zonal wind, wavier upper-level flow character, and strong regional blocking frequency/intensity changes are also detected during both AA periods. These results based on statistical analyses highlight the possible role of AA in affecting mid-latitude weather patterns, but further work is needed to quantify the influence of AA on particular mid-latitude dynamical features. |
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