近50年广西蒸发量与太阳辐射关系分析

Analysis of the relationship between evaporation and solar radiation of Guangxi in recent 50 years

采用Mann—Kendall趋势检验方法和Pearson相关分析法计算广西全区92个气象观测站点的20cm口径蒸发皿蒸发量和太阳辐射数据(1961 2010年),分析两者变化关系,得出:,广西全区的蒸发皿蒸发量与太阳辐射两者之间存在显著正相关关系,均为显著下降趋势,桂北地区的蒸发皿蒸发量受太阳辐射的影响最为明显;在季节变化方面,春、夏、冬三季蒸发皿蒸发量存在显著减少趋势,桂南地区的蒸发能力最强,但下降趋势没有桂北和桂中地区明显。春季、夏季太阳辐射变化存在显著减少趋势,桂北地区太阳辐射变化减少趋势比桂南地区明显。

In this paper, the Mann-Kendall trend test and Pearson correlation analysis were used to calculate the evaporation capacity of 20 cm evaporating dish and solar radiation data（1961-2010） of 92 meteorological observation stations in the whole region of Guangxi and analyzed the relationship between the two. The conclusion was： there was a significant positive correlation between the evaporation of the evaporating dish and the solar radiation in Guangxi, both of which had a downward trend. The evaporation of the evaporating dish in the north of Guangxi is affected by the solar radiation most. The evaporation of evaporation in spring, summer and winter was significantly reduced and the evaporation capacity of southern Guangxi was the strongest, but the decline was not obvious in northern Guangxi and middle Guangxi. There was a significant decreasing trend of solar radiation in spring and summer. The decreasing trend of solar radiation in North Guangxi was more obvious than that in southern Guangxi.