陕西关中地区降水对环境因子变化的响应特征研究

Research on Response Characteristics of Precipitation to the Changing Environmental Factors in Guanzhong of Shaanxi Province

在全球气候变化的背景下,探寻和建立降水与环境因子之间的关系,可以为降水、变化环境定量化预测研究建立理论和方法基础,兹分析了陕西关中地区主要县市的温度、日照时数、风速和空气相对湿度4个环境因子与不同频率的降水间的影响与响应特征。结果表明,温度因子变化对25%、50%、75%频率的降水影响最为显著,降水对相对湿度的响应程度紧随其后,且相对湿度对5%频率的丰水情况影响更为显著。而日照时数对于各频率的降水影响也较为显著;各频率的降水,对风速的作用和影响关系均表现为不显著。表明较高的温度、相对湿度和较大的日照时数将有利于关中地区降水的丰沛化。研究结果可为揭示关中地区环境变化的特性,进一步为生态环境建设和水资源合理开发利用研究提供依据。

Under the background of global climate change, it is very important to looking for and establish a clear relationship between precipitation and environmental factors, which could establish certain theoretical basis and effective method for future quantitative prediction on precipitation and changing environment. The relation be- tween precipitation and four environmental factors, including air temperature, relative air humidity, sunshine dura- tion and wind speed of different counties in Guanzhong area, Shaanxi province were analyzed. The results showed that temperature showed a significant response to 25%, 50% and 75% precipitation, and the response de- gree of precipitation to the relative air humidity had the second place after that, the air humidity showed stron- gest effect to 5% richest precipitation; Sunshine duration also showed a rather closely relationship with different frequency precipitation; But wind speed showed no obvious effect to different frequency of precipitation. Higher temperature, higher the relative humidity and the more sunshine hours were advantageous to the precipitation abundantly copious in Guanzhong area. The research could improve the further research on changing characteris- tics of the environment in loess area, and provides the basis for ecological environment construction and reason- able exploring and using of water resources.