Figure : fig5-1

El Niño and La Niña Winters

Figure 5.2

National Oceanic and Atmospheric Administration
Fiona Martin

This figure appears in chapter 5 of the Climate Science Special Report: The Fourth National Climate Assessment: Volume I report.

El Niño- and La Niña-related winter features over North America. Shown are typical January to March weather anomalies and atmospheric circulation during moderate to strong El Niño and La Niña conditions: (top) During El Niño, there is a tendency for a strong jet stream and storm track across the southern part of the United States. The southern tier of Alaska and the U.S. Pacific Northwest tend to be warmer than average, whereas the southern tier of United States tends to be cooler and wetter than average. (bottom) During La Niña, there is a tendency of a very wave-like jet stream flow over the United States and Canada, with colder and stormier than average conditions across the North and warmer and less stormy conditions across the South. (Figure source: adapted from Lindsey 2016a249b0c2-5a53-426d-8b9b-cc77e573568f ).

Free to use with credit to the original figure source.

This figure was created on September 12, 2016.

This figure was submitted on October 26, 2017.

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