关键词: 气候变化, 脆弱生态地理区, 气温, 降水量, 秦岭

Abstract: As for regionality, the study emphases of global climate change are always in the ecological fragile regions and the transitional zones of physical geographic areas, such as the coastlines, mountains and the gradient zones with sufficient moisture. The Study on climate change in the south and north Qinling Mountains is of important significance in studying global climate change. In this study, the values of mean annual and seasonal temperature and precipitation were calculated based on the data observed by the meteorological stations in the south and north Qinling Mountains so as to analyze the climate change trend from the aspects of temperature and precipitation anomalies, 5-year sliding tendency and long-term sliding tendency. In order to investigate the sharp climate change, the Mann-Kendall, sliding T and Yamamoto test method were plied. The results reveal that the average temperature in the south and north Qinling Mountains was in an increase trend, but there was a certain difference in the sharp change time and range: the sharp temperature increase (0.034 ℃/a) in the north Qinling Mountains occurred in 1989, especially in summer and winter, but that (0.014 ℃/a) in the south Qinling Mountains occurred in 1992, especially in summer and winter similarly. Precipitation in the south and north Qinling Mountains was decreased, it was decreased by 2.66 mm/a in the north Qinling Mountains and by 1.36 mm/a in the south Qinling Mountains, respectively, and its reduction was high in summer and autumn in the northern Qinling Mountains but in spring and autumn in the south Qinling Mountains.

Key words: climate change, ecological fragile region, temperature, precipitation, Qinling Mountains