关键词：
东胜矿区;潜在蒸散发;变化趋势;重现期;小波分析
摘 要：
采用Penman-Monteith公式计算潜在蒸散发量(ET0),研究东胜矿区1957-2012年潜在蒸散发量的演变趋势,并就其时间变化序列进行频率分析和小波分析。结果表明:该区ET0年均值为1 128.1mm,线性变化趋势为0.9mm/(10年),经Mann-Kendall检验增加趋势不明显,但2003年可认为是突变点。ET0的多年月均值为94.0mm,12月份最小,5月份最大。ET0存在明显的季节变化特征,冬季最小,春秋次之,夏季最大;频率分析得出该区56年来的最大值(1 284.9mm)属于300年一遇,而50年一遇的ET0为1 243.2mm,10年一遇的ET0为1 197.1mm;小波分析发现,该区ET0在25~30年较大尺度上的周期最明显,经历了7个升高-降低的循环交替,震荡主周期为28年,平均周期为11.5年左右。
译 名：
Temporal Changes of Potential Evapotranspiration in Dongsheng Mining Area in Inner Mongolia During Recent 56 Years
作 者：
NING Ting-ting;LIU Wen-zhao;LIN Wen;HAN Xiao-yang;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources;University of the Chinese Academy of Sciences;
关键词：
Dongsheng mining area;;the potential evapotranspiration;;the changing trend;;return period;;wavelet analysis
摘 要：
Based on the daily meteorological data of Dongsheng station in Inner Mongolia from 1957to 2012,the potential evapotranspiration(ET0)was calculated using the Penman-Monteith Method which was recommended by FAO and the trend of ET0was also investigated.Moreover,the frequency analysis and wavelet analysis of the time series variation of ET0 was conducted.The results showed that:(1)The mean annual ET0in the mining area was 1 128.1mm and the linear changing trend of ET0was 0.9mm/(10a).The increasing trend was not apparent from the Mann-Kendall test.However the year 2003could be considered as an abrupt point.The monthly mean ET0was 94.0mm.The value in May was maximum and in December as minimum.ET0had a distinct seasonal variation,in which winter ET0was maximum,spring and autumn ones occupy the second place,and summer ET0was minimum.(2)The frequency-analysis showed that the largest ET0of this area during latest 56years was 1 284.9mm,which was 300years frequency.Besides,ET0on a 50-yearcycle and a 10-year-cycle in this area were 1 243.2mm and 1 197.1mm respectively.(3)The wavelet analysis indicated that there were obvious periodic oscillation of 25~30year for the annual ET0,which experienced 7rising-dropping alternation circulation.The dominant period of ET0oscillation was 28years and the average period was about 11.5years.
