1961-2007年台安县气候变化特征分析

在全球变化背景下，台安县气候变化地域特征明显。本文利用1961—2007年的气候资料，通过气候倾向率和Mann-Kendall检测等方法，研究了台安县气候变化特征。结果表明:近47 a来，台安县气候明显变暖，平均气温以0.34℃/10 a的速度上升,积温净增加约260 ℃或以上，冬季增温对气候变暖的贡献最大，直接导致冬季最大冻土深度以3.6 cm/10 a速度变浅。年降水量出现减少趋势，春、夏季降水量减少比较明显，极端降水日数无变化规律。四季日照时数明显减少，不利于绿色植物的光合作用。近47 a间，除了年平均最高气温和降水量外，平均气温、年日照时数、平均最低气温、最大冻土深度、大于等于10 ℃积温和大于等于0 ℃积温等要素都发生了显著突变，但突变时间存在差异。

Characteristics of climatic change from 1961 to 2007 in Taian County,Liaoning province

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.