干旱区研究

干旱区研究 ›› 2014, Vol. 31 ›› Issue (1): 144-148.

• 气候环境 • 上一篇    下一篇

近46 a六盘山东西两侧参考作物蒸散量特征

王丽娜   

  1. 甘肃省平凉市气象局,甘肃平凉 744000
  • 收稿日期:2012-11-07 修回日期:2012-12-26 出版日期:2014-01-15 发布日期:2014-02-28
  • 作者简介:王丽娜（1979-），女，工程师，本科生，主要从事短期天气预报及相关研究.E-mail：wangln22@126.com
  • 基金资助:

    国家科技部公益行业（气象）科研专项“多时间尺度干旱监测与预警、评估技术研究”（GYHY201006023）

Variation of Reference Crop Evapotranspiration on East and West Sides of the Liupanshan Mountain in Last 46 Years

WANG Li-na   

  1. Pingliang Meteorological Bureau, Pingliang 744000, Gansu Province, China
  • Received:2012-11-07 Revised:2012-12-26 Online:2014-01-15 Published:2014-02-28

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摘要： 基于六盘山东西两侧甘肃平凉市7个气象站1965—2010年逐日气象要素，采用PenmanMonteith模型计算了逐日参考作物蒸散量，应用MannKendall非参数检验法，分析了年际变化和季节变化特征。结果表明：① 1965—2010年，平凉市参考作物蒸散量多年平均在890～1 142 mm，全市西南部蒸散量最小，东部最大，年内夏季达到最大值，春、秋季次之，冬季最小；② 近46 a来，平凉市大多数站点参考作物蒸散量呈显著下降趋势；③ 影响平凉市参考作物蒸散量季节变化的主要气候因子是风速和日照，其中，风速是影响全市蒸散量呈下降趋势的主导因子。

Abstract: In this study, the values of reference daily crop evapotranspiration were calculated using the PenmanMonteith model based on the daily meteorological data observed by 7 meteorological stations on the east and west sides of the Liupanshan Mountain in Pingliang City, Gansu Province during the period from 1965 to 2010. The seasonal and annual values of reference crop evapotranspiration were analyzed using the MannKendall nonparametric method. The results are as follows: ① The average of reference crop evapotranspiration in Pingliang City varied in a range of 890-1 142 mm during the period of 1965-2010. The minimum occurred in the southeast and the maximum in the east of Pingliang City. The maximum value of reference crop evapotranspiration in Pingliang occurred in summer, it was followed by that in spring and autumn, and the minimum occurred in winter; ② The annual reference crop evapotranspiration was significantly decreased at most meteorological stations in Pingliang in last 46 years; ③ Wind speed and sunshine duration were the main climatic factors affecting the seasonal change of reference crop evapotranspiration in Pingliang, especially wind speed.

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