The impact of ENSO and the Arctic Oscillation on winter temperature extremes in the southeast United States

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Abstract

Interannual variations of the winter mean temperature and the number of days of warm and cold extremes were investigated for the southeast United States to identify the relative influence of El Niño-Southern Oscillation (ENSO) and the Arctic Oscillation (AO). Generalized extreme value theory was used to estimate the probability distribution function (PDF) of warm and cold extremes and their return values for different phases of ENSO and the AO. An analysis of the temperature observations for the past 58 years (1951-2008) reveals that both the winter mean temperature anomalies and the number of days of extreme cold are most closely linked to variations in the AO especially in the recent past (1981-2008). In contrast, the number of days of extreme warmth are linked to both ENSO and the AO. Copyright 2011 by the American Geophysical Union.

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Lim, Y. K., & Schubert, S. D. (2011). The impact of ENSO and the Arctic Oscillation on winter temperature extremes in the southeast United States. Geophysical Research Letters, 38(15). https://doi.org/10.1029/2011GL048283

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