关键词: 气候要素, 变化趋势, 检测, 影响

Abstract: The regional characteristics of climatic changes are obvious in Taian County under the background of the global change. Based on the climate data from 1961 to 2007, the climatic characteristics in Taian County were analyzed with climatic tendency method and Mann-Kendall test method. The results show that the climate warming in Taian County is obvious in the recent 47 years under the background of the global climate change. The mean air temperature increases with the rate of 0.34℃/10 a, and the net accumulated temperature increases more than 260 ℃. Winter warming has the greatest contribution to the climate warming, which results in the decrease of the maximum frozen soil depth with the rate of 3.6 cm/10 a. Annual precipitation shows a decreasing trend, especially in spring and summer, while there is not a regular change for the days of extreme precipitation. Sunshine duration of four seasons decreases distinctly, which is not good for plant photosynthesis. Except for annual maximum temperature and precipitation, other meteorological factors including mean air temperature, annual sunshine duration, the mean minimum temperature, the maximum frozen soil depth, the accumulated temperature (≥10 ℃) and the accumulated temperature (≥0 ℃) have abrupt changes during the recent 47 years. However, the time of abrupt changes is different.