Articles | Volume 2, issue 2
https://doi.org/10.5194/wcd-2-395-2021
https://doi.org/10.5194/wcd-2-395-2021
Research article
 | 
28 Apr 2021
Research article |  | 28 Apr 2021

Influence of ENSO on North American subseasonal surface air temperature variability

Patrick Martineau, Hisashi Nakamura, and Yu Kosaka

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Short summary
To better understand the factors that impact the weather in North America, this study explores the influence of the El Niño–Southern Oscillation on wintertime surface air temperature variability using reanalysis data. Results show that La Niña enhances subseasonal variability over western North America by amplifying the baroclinic conversion of energy from the winter-mean circulation to subseasonal eddies. Changes in the structural properties of eddies are crucial for this amplification.