Figure : enso_pacific_nca4

Seasonal Effects of El Niño and La Niña in the Pacific Islands Region

Figure 27.3

East-West Center, National Oceanic and Atmospheric Administration Pacific Regional Integrated Sciences and Assessments
Victoria W. Keener, Zena N. Grecni

This figure appears in chapter 27 of the Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II report.

A prevalent cause of year-to-year changes in climate patterns in the U.S. Pacific Islands region is the El Niño–Southern Oscillation (ENSO) phenomenon. These maps show how (top) El Niño and (bottom) La Niña most commonly affect precipitation, sea level, and storm frequency in the Pacific Islands region in the year after an ENSO event. During certain months in the boreal (northern) winter, El Niño and La Niña commonly produce patterns that are different from those following an ENSO neutral year. After an El Niño, islands in the central Pacific (such as Hawai‘i) and islands in the western Pacific (such as the Republic of Palau and Guam) experience drier than normal conditions from January to March, while the western and southern Pacific see abnormally low sea levels. After a La Niña, the patterns are reversed and occur earlier (December through February).4787a318-198e-4e1c-96d0-1ec363bcbcfe Source: East-West Center.

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This figure was created on May 25, 2017.

This figure was submitted on November 29, 2018.

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