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Relations between climatic variability and hydrologic time series from four alluvial basins across the southwestern United States

Hydrogeology Journal

By:
, ,
DOI: 10.1007/s10040-006-0067-7

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Abstract

Hydrologic time series of groundwater levels, streamflow, precipitation, and tree-ring indices from four alluvial basins in the southwestern United States were spectrally analyzed, and then frequency components were reconstructed to isolate variability due to climatic variations on four time scales. Reconstructed components (RCs), from each time series, were compared to climatic indices like the Pacific Decadal Oscillation (PDO), North American Monsoon (NAM), and El Nin??o-Southern Oscillation (ENSO), to reveal that as much as 80% of RC variation can be correlated with climate variations on corresponding time scales. In most cases, the hydrologic RCs lag behind the climate indices by 1-36 months. In all four basins, PDO-like components were the largest contributors to cyclic hydrologic variability. Generally, California time series have more variation associated with PDO and ENSO than the Arizona series, and Arizona basins have more variation associated with NAM. ENSO cycles were present in all four basins but were the largest relative contributors in southeastern Arizona. Groundwater levels show a wide range of climate responses that can be correlated from well to well in the various basins, with climate responses found in unconfined and confined aquifers from pumping centers to mountain fronts. ?? Springer-Verlag 2006.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Relations between climatic variability and hydrologic time series from four alluvial basins across the southwestern United States
Series title:
Hydrogeology Journal
DOI:
10.1007/s10040-006-0067-7
Volume
14
Issue:
7
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Hydrogeology Journal
First page:
1122
Last page:
1146
Number of Pages:
25