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Maple leaves changing colour in the fall.
Credit: R. Wiebe

The longer nights of autumn trigger biochemical processes which cause leaves to change colour. Some years, when late summer and early autumn conditions are ideal, leaf colours in certain parts of Canada can be truly remarkable.

A dry September 2004 and an above average number of warm sunny autumn days and crisp nights intensified the colours in Gatineau park, transforming its rolling hills into a chromatic kaleidoscope of vivid reds, oranges, yellows, golds and browns.




UVic / SEOS / Climate Group / About Front Page Picture / Maple Leaves in the Faill Last updated: Tuesday, 31-May-2005 10:55:02 PDT
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