Increasing influence of air temperature on upper Colorado River streamflow

Connie Woodhouse, Gregory T. Pederson, Kiyomi Morino, Stephanie A. Mcafee, Gregory J. Mccabe

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

This empirical study examines the influence of precipitation, temperature, and antecedent soil moisture on upper Colorado River basin (UCRB) water year streamflow over the past century. While cool season precipitation explains most of the variability in annual flows, temperature appears to be highly influential under certain conditions, with the role of antecedent fall soil moisture less clear. In both wet and dry years, when flow is substantially different than expected given precipitation, these factors can modulate the dominant precipitation influence on streamflow. Different combinations of temperature, precipitation, and soil moisture can result in flow deficits of similar magnitude, but recent droughts have been amplified by warmer temperatures that exacerbate the effects of relatively modest precipitation deficits. Since 1988, a marked increase in the frequency of warm years with lower flows than expected, given precipitation, suggests continued warming temperatures will be an increasingly important influence in reducing future UCRB water supplies.

Original languageEnglish (US)
JournalGeophysical Research Letters
DOIs
StateAccepted/In press - 2016

Fingerprint

Colorado River (North America)
streamflow
air temperature
air
soil moisture
river
temperature
river basins
river basin
moisture
low flow
drought
warming
water supply
water
heating

Keywords

  • Colorado River Basin
  • Soil moisture
  • Warming temperatures
  • Water year streamflow

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Increasing influence of air temperature on upper Colorado River streamflow. / Woodhouse, Connie; Pederson, Gregory T.; Morino, Kiyomi; Mcafee, Stephanie A.; Mccabe, Gregory J.

In: Geophysical Research Letters, 2016.

Research output: Contribution to journalArticle

Woodhouse, Connie ; Pederson, Gregory T. ; Morino, Kiyomi ; Mcafee, Stephanie A. ; Mccabe, Gregory J. / Increasing influence of air temperature on upper Colorado River streamflow. In: Geophysical Research Letters. 2016.
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