The unusual nature of recent snowpack declines in the North American Cordillera

Gregory T. Pederson, Stephen T. Gray, Connie Woodhouse, Julio L. Betancourt, Daniel B. Fagre, Jeremy S. Littell, Emma Watson, Brian H. Luckman, Lisa J. Graumlich

Research output: Contribution to journalArticle

184 Citations (Scopus)

Abstract

In western North America, snowpack has declined in recent decades, and further losses are projected through the 21st century. Here, we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff-generating areas of the Colorado, Columbia, and Missouri River drainages. Over the past millennium, late 20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming that is due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western United States.

Original languageEnglish (US)
Pages (from-to)332-335
Number of pages4
JournalScience
Volume333
Issue number6040
DOIs
StatePublished - Jul 15 2011

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Chronology
Water Supply
North America
Rivers
Drainage
Reinforcement (Psychology)

ASJC Scopus subject areas

  • General

Cite this

Pederson, G. T., Gray, S. T., Woodhouse, C., Betancourt, J. L., Fagre, D. B., Littell, J. S., ... Graumlich, L. J. (2011). The unusual nature of recent snowpack declines in the North American Cordillera. Science, 333(6040), 332-335. https://doi.org/10.1126/science.1201570

The unusual nature of recent snowpack declines in the North American Cordillera. / Pederson, Gregory T.; Gray, Stephen T.; Woodhouse, Connie; Betancourt, Julio L.; Fagre, Daniel B.; Littell, Jeremy S.; Watson, Emma; Luckman, Brian H.; Graumlich, Lisa J.

In: Science, Vol. 333, No. 6040, 15.07.2011, p. 332-335.

Research output: Contribution to journalArticle

Pederson, GT, Gray, ST, Woodhouse, C, Betancourt, JL, Fagre, DB, Littell, JS, Watson, E, Luckman, BH & Graumlich, LJ 2011, 'The unusual nature of recent snowpack declines in the North American Cordillera', Science, vol. 333, no. 6040, pp. 332-335. https://doi.org/10.1126/science.1201570
Pederson GT, Gray ST, Woodhouse C, Betancourt JL, Fagre DB, Littell JS et al. The unusual nature of recent snowpack declines in the North American Cordillera. Science. 2011 Jul 15;333(6040):332-335. https://doi.org/10.1126/science.1201570
Pederson, Gregory T. ; Gray, Stephen T. ; Woodhouse, Connie ; Betancourt, Julio L. ; Fagre, Daniel B. ; Littell, Jeremy S. ; Watson, Emma ; Luckman, Brian H. ; Graumlich, Lisa J. / The unusual nature of recent snowpack declines in the North American Cordillera. In: Science. 2011 ; Vol. 333, No. 6040. pp. 332-335.
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