Abstract: To study the effect of global warming on temperate forest ecosystem, 1553 tree ring samples of 13 tree species planted in 1982 - 1991 on Changbai Mountain are.drilled and theirwidths are analyzed in relation to meteorological data.The results show that few significant relationships can be detected between annual ring width and corresponding annualtemperature regime.However, as compared with the period of 1982-1986, the averageannual air temperature and ring width are increased by 0.48℃ and 6.1 %, respectively in1987-1991.When average annual air temperature is increased by 1℃ in corresponding to 176m lower elevation, the annual ring width is increased by 50%.Accordingly, 1℃ increment in average annual temperature results in an increase of 0.6-3.1m³ha^-1·yr^-1 in woodvolume growth rate.It is found that the accelerated growth is positively related to thetemperature rise at night rather than at day time.Deciduous tree species responds to temperature rise more sensitively than conifer, and hence, its proportion in the standing composition of deciduous-Korean pine forest will increase accordingly.

Key words: Annual ring, Global change, Deciduous-Korean pine forest