关键词: 秦岭中段, 分水岭, 树轮宽度, 温度重建

Abstract: A tree-ring width chronology has been built from Larix chinensis at the divide sampling site in the mid-Qinling Mountains from 1814 to 2003. The calculation results show that standardization (STD) chronology was significantly correlated with the mean air temperature from January to July. The mean January-July temperature at the sampling site was reconstructed by using the multiple regression method, and the explained variance of the function was 41% (F=15.062, p<0.0001). Two cold periods in the past 190 years were found in 1814-1850, and 1876-1889, and two warm periods from 1851-1875, and 1890-1933, respectively. The reconstructed temperature was relatively stable from the early 1930s to 1990, but increased quickly after 1990.

Key words: mid-Qinling Mountains, divide, tree-ring width, air temperature reconstruction