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http://hdl.handle.net/20.500.12128/8623
Tytuł: | Tree-ring widths and snow cover depth in High Tauern |
Autor: | Falarz, Małgorzata |
Słowa kluczowe: | calibration; earth sciences; forestry; industrial hygiene; reinforcement; soft computing |
Data wydania: | 2017 |
Źródło: | IOP Conference Series: Earth and Environmental Science, Vol. 95 (2017), art. no. 062005 |
Abstrakt: | The aim of the study is to examine the correlation of Norway spruce tree-ring widths
and the snow cover depth in the High Tauern mountains. The average standardized tree-ring
widths indices for Nowary spruce posted by Bednarz and Niedzwiedz (2006) were taken into
account. Increment cores were collected from 39 Norway spruces growing in the High Tauern
near the upper limit of the forest at altitude of 1700-1800 m, 3 km from the meteorological
station at Sonnblick. Moreover, the maximum of snow cover depth in Sonnblick (3105 m a.s.l.)
for each winter season in the period from 1938/39 to 1994/95 (57 winter seasons) was taken
into account. The main results of the research are as follows: (1) tree-ring widths in a given
year does not reveal statistically significant dependency on the maximum snow cover depth
observed in the winter season, which ended this year; (2) however, the tested relationship is
statistically significant in the case of correlating of the tree-ring widths in a given year with a
maximum snow cover depth in a season of previous year. The correlation coefficient for the
entire period of the study is not very high (r=0.27) but shows a statistical significance at the
0.05 level; (3) the described relationship is not stable over time. 30-year moving correlations
showed no significant dependencies till 1942 and after 1982 (probably due to the so-called
divergence phenomenon). However, during the period of 1943-1981 the values of correlation
coefficient for moving 30-year periods are statistically significant and range from 0.37 to 0.45;
(4) the correlation coefficient between real and calibrated (on the base of the regression
equation) values of maximum snow cover depth is statistically significant for calibration period
and not significant for verification one; (5) due to a quite short period of statistically significant
correlations and not very strict dependencies, the reconstruction of snow cover on Sonnblick
for the period before regular measurements seems to be not reasonable. |
URI: | http://hdl.handle.net/20.500.12128/8623 |
DOI: | 10.1088/1755-1315/95/6/062005 |
ISSN: | 1755-1307 |
Pojawia się w kolekcji: | Artykuły (WNP)
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