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The North American winter ‘dipole’ and extremes activity: A CMIP5 assessment

Atmospheric Science Letters, ISSN: 1530-261X, Vol: 16, Issue: 3, Page: 338-345
2015
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Article Description

The 2013–2014 winter in North America brought intense drought in theWest and severe cold in the East. The circulation anomalies were characterized as a dipole: an amplified upper-level ridge over the West Coast and a deepened trough over the central-eastern United States. A previous study using a single model has linked the dipole to the ElNiño precursor and found that this link has strengthened in recent years. Here, 17 models from the Coupled Model Intercomparison Project Phase 5 are used to examine the dipole activity. Most models capture the dipole and its association with El Niño precursor and project this association to strengthen.

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