摘要
采用线性趋势分析和信噪比等方法对1965~2009年濮阳市不同时间尺度的蒸发量变化趋势和突变点进行了分析。结果表明：年蒸发量以-13.89 mm/a的倾向率减少。春季、夏季、秋季和冬季蒸发量的倾向率分别是-4.039、-6.378、-2.355和-1.283 mm/a,以夏季蒸发量的减少趋势最明显。在12个月中,以6月份蒸发量的减少最快,以2月份减少最慢。年蒸发量在1983年发生了一次突变。
The methods of linear trend analysis and signal-noise ratio were used to analyze the change and mutation of evaporation capacity in different time scales of Puyang city from 1965 to 2009.The results showed that the annual evaporation capacity decreased at the tendency rate of-13.89 mm/a.The tendency rates of evaporation capacity in spring,summer,autumn and winter were-4.039,-6.378,-2.355 and-1.283 mm/a respectively,and summer had the most obvious decreasing trend in evaporation capacity.The evaporation capacity decreased fastest in June,and slowest in February among the 12 months of a year.There was a mutation of evaporation capacity in 1983.
出处
《江西农业学报》
CAS
2011年第7期171-173,177,共4页
Acta Agriculturae Jiangxi
关键词
濮阳
蒸发量
变化特征
突变分析
Puyang
Evaporation capacity
Change characteristic
Mutation analysis
