Articles | Volume 2, issue 2
Weather Clim. Dynam., 2, 395–412, 2021
https://doi.org/10.5194/wcd-2-395-2021
Weather Clim. Dynam., 2, 395–412, 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 et al.

Data sets

JRA-55: Japanese 55-year Reanalysis, Daily 3-Hourly and 6-Hourly Data Japan Meteorological Agency https://doi.org/10.5065/D6HH6H41

Hadley Centre Global Sea Ice and Sea Surface Temperature (HadISST) Hadley Centre for Climate Prediction and Research/Met Office/Ministry of Defence/United Kingdom https://doi.org/10.5065/XMYE-AN84

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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.