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Position: Home > Articles > Analysis of Evaporation Change Characteristics of Xuanhua County in Recent 30 Years Anhui Agricultural Science Bulletin 2015,21 (16) 131-133

宣化县近30a蒸发量变化特征分析

作  者:
薛力;周彦丽
单  位:
宣化县气象局;张家口市气象局
关键词:
蒸发量;变化特征;宣化
摘  要:
利用宣化县气象站1981-2013年期间小型蒸发皿(口径20cm)蒸发量资料,对近30a宣化县蒸发量变化进行统计分析。结果表明,近30a宣化蒸发量最大的为5月,最小的为1月;一年四季中春季蒸发量最大,变化幅度也最大,夏季次之,冬季蒸发量及变化幅度最小,不同季节蒸发量变化趋势不同,春季和秋季蒸发量下降,夏季无明显变化,而冬季蒸发量呈上升趋势;年变化不明显,呈波状分布,蒸发量最大为2 110mm,出现在1999年,最小为1 610.1mm,出现在2003年,年最大蒸发量与最小蒸发量相差499.9mm;年代际呈波状变化,整体呈下降趋势,年代特征明显,20世纪80年代为各年代最高值,平均蒸发量为1 896.1mm,高出近30a平均值26.4mm,20世纪90年代蒸发量为1 842.9mm,为各年代最低值,比平均值低26.7mm。
译  名:
Analysis of Evaporation Change Characteristics of Xuanhua County in Recent 30 Years
作  者:
Xue Li;Xuanhua Meteorological Bureau;
关键词:
Evaporation amount;;Variatoin characteristics;;Xuanhua County
摘  要:
The observation date of 20 cm caliber evaporation pan from weather stations of Xuanhua County were ana-lyzed,time ranging from 1981 to 2013.The results showed that the maximum evaporation value is in May,while mini-mum evaporation value is in January for nearly 30 years.It dropped quickly and changed greatly in spring,and nextin summer,smallest in winter.Different season have different variation trends.Evaporation decrease mainly appearsin spring and autumn,while an increase trend appears in winter.There's no obvious change in summer.XuanhuaCounty evaporation does not change significantly,which shows a wavy distribution.The maximum evaporation is2110 mm in 1999,and the minimum evaporation is 1610.1mm in 2003.The difference between the two is 499.9mm.Itis proved that the change of time distribution is obvious.The highest evaporation value is 1896.1mm in the 1980 s,which is 26.4mm,higher than the average value.The minimum value is 1842.9mm in the 1990 s,which is 26.7mm,lower than the average value.

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