陕甘宁接壤区气候变化特征及其生态环境效应

为了能够正确反映陕甘宁接壤区多年气候变化的趋势,特别是1999年以后的气候改善状况,利用线性回归分析、趋势分析等方法对1951～2004年间39个测站的气温和降水的记录进行分析.结果表明:陕甘宁接壤区暖干化趋势明显,多年来一直处于干燥的状态,气温在波动中不断升高,降水在波动中不断减少,这种恶劣的气候状况严重影响了陕甘宁接壤区的生态环境建设.但是1999年之后,在气候暖干化的大背景之下,气温有所降低,降水有所增加,这是一个较好的气候变化趋势,对于气候的转型以及生态环境的重建有着重要的意义.

The climate change tendency of the contiguous areas of Shaanxi Gansu Ningxia and its effect on ecological environment

Under the background of the global warming,as one of the Chinese serious soil erosion and climate change sensitive regions,the contiguous areas of Shaanxi-Gansu-Ningxia have received universal attention.In order to reflect the major tendency of the climate change in those areas,specially the improvement of the climate status since 1999,analysis is made of the temperature and precipitation record between 1951 and 2004 in 39 observatory stations by utilizing the linear regression method and tendency analysis method.The results show that: the warming-drying trend is obvious,and the areas has been under the dry status for many years,and the temperature becomes higher in fluctuation gradually,while the precipitation becomes smaller.This bad climate condition has been seriously affected the ecological environment building of the contiguous areas of Shaanxi-Gansu-Ningxia.Only after 1999,under the background of warming-drying trend,the temperature becomes lower,while the precipitation becomes bigger,which is a good climate change tendency and has the vital significance regarding climate reforming and the rebuilding of ecological environment.