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Sub-Regional Seasonal Precipitation Linkages to SOI and PDO in the Southwest United States | CLIMAS

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Sub-Regional Seasonal Precipitation Linkages to SOI and PDO in the Southwest United States

TitleSub-Regional Seasonal Precipitation Linkages to SOI and PDO in the Southwest United States
Publication TypeArticles
Year of Publication2002
AuthorsBrown, D, Comrie, A
JournalAtmospheric Science Letters
Volume3
Issue2-4
Pagination94-102
PublisherJohn Wiley & Sons, Ltd.
ISBN Number1530-261X
KeywordsGIS, PDO, precipitation, SOI, Southwest United States, synoptic climatology
Abstract

This paper highlights the relationship between precipitation variability at the sub-regional level in the Southwest United States and the SOI and PDO climate teleconnection indices during the period 1950–2000. Statistical correlations at α = 0.05 and 0.01 levels are calculated for fall, winter, and spring precipitation in the Southwest, and contemporaneous and antecedent seasonal SOI and PDO index values. A strong SOI-winter precipitation signal is seen to progress across Arizona and New Mexico from southwest to northeast over a three-season lagged period. The PDO also exhibits a strong relationship with winter and spring precipitation in New Mexico; however, the PDO is not well correlated with precipitation in Arizona. The results underscore the non-uniform spatio-temporal relationships of the SOI and PDO indices as they relate to the precipitation regime of the Southwest, and provide a framework for future diagnostic analyses of these relationships. Copyright © 2003 Royal Meteorological Society.

DOI10.1006/asle.2002.0051