International Journal of Biometeorology

, Volume 44, Issue 2, pp 53–59

Spring phenology trends in Alberta, Canada: links to ocean temperature

  • E. G. Beaubien
  • H. J. Freeland
Original Article

DOI: 10.1007/s004840000050

Cite this article as:
Beaubien, E. & Freeland, H. Int J Biometeorol (2000) 44: 53. doi:10.1007/s004840000050


Warmer winter and spring temperatures have been noted over the last century in Western Canada. Earlier spring plant development in recent decades has been reported for Europe, but not for North America. The first-bloom dates for Edmonton, Alberta, were extracted from four historical data sets, and a spring flowering index showed progressively earlier development. For Populus tremuloides, a linear trend shows a 26-day shift to earlier blooming over the last century. The spring flowering index correlates with the incidence of El Niño events and with Pacific sea-surface temperatures.

Copyright information

© International Society of Biometeorology 2000

Authors and Affiliations

  • E. G. Beaubien
    • 1
  • H. J. Freeland
    • 2
  1. 1.Devonian Botanic Garden, University of Alberta, Edmonton, Alberta T6G 2E1, Canada e-mail: Tel.: +1-780-987-5455/3054, Fax: +1-780-987-4141CA
  2. 2.Institute of Ocean Sciences, P.O. Box 6000, Sidney, British Columbia V8L 4B2, CanadaCA

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