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中文摘要：
利用关中平原13个典型观测站1959～2007年的气温和降水 数据,做相关性分析、滑动的T检验分析、线性回归分析、气温突变分析、趋势分析等。结果表明,关中平原49年来气温在波动中呈显著上升趋势,增长率为0.27℃/10 a,降水呈减少趋势,平均每10年减少1.2mm。春季、秋季和冬季气温增加,春季、秋季降水减少,夏季、冬季降水增加。关中中部气温最高、增长最快。东、西部地区降水减少,中部降水增加,西部降水量最大,下降幅度也最大,对关中年降水量减少的贡献最大。20世纪90年代以来,关中平原整体上气候暖干化特征显著,东西部地区也呈现暖干化,中部近年来呈现暖湿化,同时关中暖春、暖冬化,春旱、秋旱等也愈加显著。
英文摘要：
Based on the temperature and precipition data from 13 typical observatories between 1959 and 2007 in Guanzhong Plain, the correlative analysis, analysis of sliding T test, linear regressive analysis and climatic mutation analysis were applied to analyze the climate trend and so on. It was found that the temperature fluctuated and increased obviously by the rate of 0.27℃/10a during last 49 years in Guanzhong Plain. The precipitation decreased by the rate of 1.22mm/10a. The temperature increased in spring autumn and winter,the precipitation de-creased in spring and autumn. The temperature was the highest and grew fastest in midland of Guanzhong. The precipitation decreased in east and west of Guanzhong and increased in midland. The precipitation was the most and the range of decreasing was the largest in midland, the contribution was also the largest for reducing precipi-tation of Guanzhong. From 1990s, the features of climatic warming-drying trend was very remarkable on the whole in Guanzhong Plain, it was the same to the east and west. But the midland was warming and damping in recent years. At the same time ,warming in spring, warming in winter, drying in spring and drying in autumn were very significant.
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