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The Effects of Climate Factors on the Tree Ring Growth

This study aims to reveal the relationship between major climatic factors and radial growth in
Siu-ri, NamYangJuSi, Kyeonggido. To identify tree growth responses to climatic variation, we used
correlation analysis after standardization and cross-dating of tree ring growth. We use the climatic
data(monthly mean, minimum, maximum temperature and precipitation) from September of previous
year to August of current year. In terms of relationship between mean, minimum, maximum temperature and tree ring growth, negative correlations were observed in September and October of
the previous year. In case of Quercus mongolica, negative relationship were appeared in December
of the previous year, January and February of present year. When it comes monthly maximum temperature,
August and September of present year was negatively correlated with radial growth in the
case of Pinus densiflora. We can conclude that reduced soil moisture due to high temperatures causes
a water stress that stunts tree growth. In contrast, there are positive correlations in March of
present year. These results suggest that high temperatures in March appear to prolong the growing
season. Growth was positively correlated with precipitation from October to December of previous
year and from May to September of present year. The results suggest that the smooth water
supply from precipitation can promote the tree growth.