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河北邢台地区蒸发皿蒸发量的变化特征及影响因素

杨允凌杨丽娜王晓娟刘瑾钱瑞贞   

  1. 河北省邢台市气象局,河北 邢台 054000
  • 收稿日期:2012-08-20 修回日期:2013-01-06 出版日期:2013-03-30 发布日期:2013-03-01
  • 作者简介:杨允凌( 1968 - ) ,女,工程师,主要从事气象预报服务工作. E - mail: xtyangyunling@126. com
  • 基金资助:

    河北省气象局科研项目( 11KY40) 资助
     

Variation Charicteristic and Influence Factors of Pan Evaporation in Xingtai of Hebei Province

YANG YunlingYANG LinaWANG XiaojuanLIU JinQIAN Ruizhen   

  1. Xingtai Meteorological Bureau of Hebei Province,Xingtai 054000,China)
  • Received:2012-08-20 Revised:2013-01-06 Online:2013-03-30 Published:2013-03-01

摘要:

采用线性倾向估计、累积距平曲线、滑动T 检验和完全相关系数法,分析了1972 ~ 2011 年邢台地区蒸发皿蒸发量的变化特征及其影响因素。结果表明: 邢台地区年及4 季蒸发量呈现显著下降趋势,其中春季蒸发量的下降趋势最为明显,其次为夏季,年蒸发量的下降主要源于春季、夏季的贡献,年蒸发量在1983 年发生突变,之后明显下降。邢台地区年蒸发量与日照时数、平均风速、气温日较差呈正相关,与降水量、相对湿度呈负相关。平均风速、气温日较差和日照时数下降是邢台地区蒸发量减少的主要原因

关键词: 蒸发皿蒸发量, 变化特征, 影响因素, 邢台

Abstract:

The variation characteristics of pan evaporation and its influencing factors from 1972 to 2011 in Xingtai were analyzed by using methods of a linear tendency,accumulative anomaly,slide T test and a complete correlation coefficient. The results show that the annual and seasonal pan evaporation presented decreasing trend,especially in spring,then in summer. Decrease of annual pan evaporation was mainly due to spring and summer pan evaporation decrease. The abrupt change of annual pan evaporation occurred in 1983,and after that the pan evaporation decreased obviously. Annual pan evaporation in Xingtai was positively correlated with sunshine hours,average wind speed and temperature daily range,and negatively correlated with precipitation,and relative humidity. The decreasing average wind speed,temperature daily range and sunshine hours are the major reasons for the downward pan evaporation in
Xingtai.

Key words: pan evaporation, variation, influencing factor

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