Abstract
The relationships between various climate parameters and previously constructed tree-ring indices (annual ring width index, IWar; annual ring density index, IDar) for seven tree species found in Okutama, Tokyo were examined. Significant correlations between tree-ring indices and climate parameters were observed. The four major correlations were: 1) a positive correlation between IWar and monthly mean temperature from January to March of the current year; 2) a positive correlation between IDar and monthly mean temperature from May to August of the current year; 3) a negative correlation between IDar and monthly mean temperature from May to July of the previous year; and 4) a negative correlation between IDar and number of days with precipitation from June to September of the current year. These four relationships also demonstrated the varying responses of different tree species to variations in climate. The significant correlation coefficients obtained from the relationships between the tree-ring indices and a) monthly maximum temperature were greater than those obtained from the relationships between the tree-ring indices and b) monthly mean temperature and c) monthly minimum temperature.
