关键词: 川西高原, 树轮宽度, 气候重建, 平均气温

Abstract: Tree-ring width of Picea schrenkiana sampled at Jinchuan and its response to climate change were analyzed. Correlation analysis indicates that the tree-ring chronology and the June mean air temperature at Jinchuan station in the West Sichuan Plateau was significantly correlated. The June mean air temperature series of 1713-2010 at Jinchuan was well reconstructed. Its reliability was substantiated by the leave-one-out method. According to the reconstructed temperature series, the June mean air temperature over the period was 18.2℃. The reconstructed series contained three warm periods: 1825-1839, 1854-1892 and 1951-1961, as well as four cold periods: 1792-1804, 1842-1853, 1864-1893 and 1911-1924. Power spectrum analysis and wavelet analysis show that the series had variation periods of 2-3, 7-8, 20-30, 32-64 and 70-130 years.

Key words: West Sichuan Plateau, tree-ring width, climatic reconstruction, mean air temperature