J4 ›› 2011, Vol. 29 ›› Issue (4): 488-491.

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Trends of Potential Evapotranspiration in Maqu County of Gansu Province in Recent 40 Years

WANG Zhigui1,WANG Jianbin1,FENG Jingchang1,WANG Suping2   

  1. 1. Gannan Meteorological Bureau of Gansu Province,Hezuo 747000,China;
    2. Institute of Arid Meteorology,CMA,Lanzhou 730020,China.
  • Received:2011-07-22 Revised:2011-09-20 Online:2011-12-31 Published:2011-12-31

甘肃玛曲县近40 a 潜在蒸散量的变化趋势

汪治桂1 ,王建兵1 ,冯景昌1 王素萍2
  

  1. 1. 甘肃省甘南州气象局,甘肃合作747000; 2. 中国气象局兰州干旱气象研究所,甘肃兰州730020
  • 作者简介:汪治桂( 1974—) ,女,青海湟中人,汉族,工程师,主要研究方向: 中短期天气预报及相关研究. E - mail: w_zh_g01@163. com
  • 基金资助:

    中国科学院寒旱区陆面过程与气候变化重点实验室开放基金“黄河源区气候变化的分析研究”资助

Abstract:

Based on meteorological data during 1971 - 2010 from Maqu weather station,the monthly potential evapotranspiration was
calculated by using the Penman - Monteith method,and the trends of potential evapotranspiration in Maqu were analyzed by using statistic
analysis,Mann - Kendall method and wavelet analysis. The results indicated that the annual variation of potential evapotranspiration
presented a significant increasing trend with the rate of 12. 0 mm/10 a,and there was quasi - 10 and quasi - 5 years change period.
The trend of pan - evaporation was similar to the potential evapotranspiration in Maqu. Monthly mean of the potential evapotranspiration
presented single peak with increase from January to July and going down from August. The maximum of monthly mean potential
evapotranspiration occurred in July. The seasonal distribution of potential evapotranspiration was consistent with precipitation and temperature
in Maqu.

Key words: Maqu, potential evapotranspiration, variation

摘要:

利用玛曲县气象观测站1971 ~ 2010 年的地面气象观测资料,运用Penman - Monteith 公式计算得出玛曲县逐月潜在蒸散量值。通过Mann - Kendall 法、小波分析等统计方法进行分析,结果发现玛曲县潜在蒸散量年际变化呈逐年上升趋势,上升趋势为12. 0 mm/10 a; 并且存在准10 a 和准5 a 周期。潜在蒸散量与小型蒸发皿蒸发量的逐年变化趋势基本一致。月平均潜在蒸散量呈单峰型,从1月到7 月呈上升趋势,7月是蒸散量最大月,从8 月又开始下降。并且月平均潜在蒸散量最大值出现在年平均气温最高和降水量最多的7 月。玛曲县潜在蒸散量的季节分布与该地降水量的季节分布和气温的高低季节变化一致

关键词: 玛曲, 潜在蒸散量, 变化

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