Figure : el-nino-la-nina-winters

El Niño/La Niña Cause Short-Term Changes in Weather Patterns

Figure -.7

U.S. Global Change Research Program
Matthew Dzaugis

This figure appears in chapter appendix-5-frequently-asked-questions of the Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II report.

El Niño and La Niña events create different weather patterns during winters (January through March) over North America. (top) During an 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 United States tends to be cooler and wetter than average. (bottom) During a La Niña, there is a tendency for 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. Source: Perlwitz et al. 2017.1a46c6a2-4b5f-408d-b3d0-21ebdd4f960b

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This figure was created on June 13, 2017.

This figure was submitted on December 03, 2018.


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