la niña conditions in the tropical pacific are known to shift … · 2016-05-27 · la niña...

Wet June to Sept. Dry Nov. to following March Dry Jan. to May Nov. to following April Sept. to following March Aug. to Dec. May to following Feb. Sept. to following Jan. June to Dec. Jan. to April Dry Oct. to Dec. Wet Nov. to following April Wet July to Sept. Oct. to following April Dry June to following April Wet Jun to following Mar Wet Dec. to March Dry June to Sept. Dry Aug. to Dec. Wet Dry La Niña conditions in the tropical Pacific are known to shift rainfall patterns in many different parts of the world. Although they vary somewhat from one La Niña to the next, the strongest shifts remain fairly consistent in the regions and seasons shown on the map below. La Niña and Rainfall International Research Institute for Climate and Society @climatesociety /climatesociety For more information on El Niño and La Niña, go to: http://iri.columbia.edu/enso Sources: 1. Ropelewski, C. F. and M. S. Halpert, 1989: Precipitation patterns associated with the high index phase of the Southern Oscillation. J. Climate., 2, 268 284, 2. Mason and Goddard, 2001. Probabilistic precipitation anomalies associated with ENSO. Bull. Am. Meteorol. Soc. 82, 619-638

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Page 1: La Niña conditions in the tropical Pacific are known to shift … · 2016-05-27 · La Niña conditions in the tropical Pacific are known to shift rainfall patterns in many different

WetJune to Sept.

DryNov. to following March

DryJan. to May Nov. to following April

Sept. to following March

Aug. to Dec.

May to following Feb.

Sept. to following Jan.

June to Dec.

Jan. to April

DryOct. to Dec.

WetNov. to following April

WetJuly to Sept.

Oct. tofollowing April

DryJune to following April

WetJun to following Mar

WetDec. to March

DryJune to Sept.

DryAug. to Dec.

Wet

Dry

La Niña conditions in the tropical Pacific are known to shift rainfall patterns in many different parts of the world. Although they vary somewhat from one La Niña to the next, the strongest shifts remain fairly consistent in the regions and seasons shown on the map below.

La Niña and Rainfall

International Research Institutefor Climate and Society

@climatesociety/climatesociety

For more information on El Niño and La Niña, go to: http://iri.columbia.edu/ensoSources: 1. Ropelewski, C. F. and M. S. Halpert, 1989: Precipitation patterns associated with the high index phase of the Southern Oscillation. J. Climate., 2, 268 284, 2. Mason and Goddard, 2001. Probabilistic precipitation anomalies associated with ENSO. Bull. Am. Meteorol. Soc. 82, 619-638

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