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Climatic Significance of Light Rings in Timberline Spruce, Picea abies, Austrian Alps

Wolfgang Gindl
Arctic, Antarctic, and Alpine Research
Vol. 31, No. 3 (Aug., 1999), pp. 242-246
DOI: 10.2307/1552252
Stable URL: http://www.jstor.org/stable/1552252
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Climatic Significance of Light Rings in Timberline Spruce, Picea abies, Austrian Alps
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Abstract

A ring-width and light-ring chronology was built from timberline spruce [Picea abies (L.) Karst.] in the eastern Alps in Austria. Comparison of the chronology spanning the period from 1750 to 1997 with a long-term temperature record revealed a close relationship between September and October temperatures and light-ring occurrence. Tracheidogram analysis of radial tracheid diameter and cell-wall thickness of light rings formed in 1912 compared with a reference year confirmed the influence of temperatures of this period on light-ring formation. It is concluded that light rings in timberline spruce are pointers for abnormally low temperatures during the last part of the growing season.

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