Sub-regional seasonal precipitation linkages to SOI and PDO in the Southwest United States

David P. Brown, Andrew C. Comrie

Research output: Contribution to journalArticle

9 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)94-102
Number of pages9
JournalAtmospheric Science Letters
Volume3
Issue number2-4
DOIs
StatePublished - Jan 1 2002

Keywords

  • GIS
  • PDO
  • Precipitation
  • SOI
  • Southwest United States
  • Synoptic climatology

ASJC Scopus subject areas

  • Atmospheric Science

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