Responses of Qilian junipers radial growth of different ecological environment and detrending method to climate change in Qinghai Province Influence of different detrending methods on climate signal in tree-ring chronologies in Wolong National Natural Reserve, western Sichuan, China Impact of time series correction on forest CO2 flux A comparative analysis of ARSTAN and the dplr package of R language in analyses of tree-ring chronologies Stability of Relationship between Climate and Picea crassifolia Radial Growth in Different Elevations