Multiyear La Nina events and persistent drought in the contiguous United States

Julia Cole, Jonathan Overpeck, Edward R. Cook

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

La Niña events typically bring dry conditions to the southwestern United States. Recent La Niñas rarely exceed 2 years duration, but a new record of ENSO from a central Pacific coral reveals much longer La Niña anomalies in the 1800s. A La Niña event between 1855-63 coincides with prolonged drought across the western U.S. The spatial pattern of this drought correlates with that expected from La Niña during most of the La Niña event; land-surface feedbacks are implied by drought persistence and expansion. Earlier periods also show persistent La Niña-like drought patterns, further implicating Pacific anomalies and surface feedbacks in driving prolonged drought. An extended index of the Pacific Decadal Oscillation suggests that extratropical influences would have reinforced drought in the 1860s and 1890s but weakened it during the La Niña of the 1880s.

Original languageEnglish (US)
JournalGeophysical Research Letters
Volume29
Issue number13
StatePublished - Jul 1 2002

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drought
La Nina
anomalies
anomaly
Pacific Decadal Oscillation
new record
El Nino-Southern Oscillation
land surface
coral
persistence
oscillations
expansion

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Multiyear La Nina events and persistent drought in the contiguous United States. / Cole, Julia; Overpeck, Jonathan; Cook, Edward R.

In: Geophysical Research Letters, Vol. 29, No. 13, 01.07.2002.

Research output: Contribution to journalArticle

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