Journal of Arid Meteorology ›› 2015, Vol. 33 ›› Issue (1): 63-69.DOI: 10.11755/j.issn.1006-7639(2015)-01-0063

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Change Characteristics of Reference Crop Evapotranspiration in the Northern Xinjiang

WANG Jian1, 2, Lü Xin 1, 2WANG Jiangli 1, 2
  

  1. 1. Agricultural College of Shihezi University,Shihezi 832003, China;
    2. Key Laboratory of Oasis Ecological Agriculture of Xinjiang Production and Construction Group,Shihezi 832003, China  
  • Online:2015-02-28 Published:2015-02-28

北疆地区参考作物蒸散量时空变化特征

王 健1, 2吕 新1, 2, 王江丽1, 2   

  1. 1. 石河子大学农学院,新疆 石河子 832003;
    2. 新疆生产建设兵团绿洲生态农业重点实验室,新疆 石河子 832003
  • 通讯作者: 吕新(1964-),男,教授,博士,博士生导师,主要从事农业生态研究.E-mail:lxshz@126.com

Abstract:

The temporal - spatial variation of reference crop evapotranspiration in northern Xinjiang was analyzed based on daily observations from 22 meteorological stations in the northern Xinjiang during 1962 - 2010 in this paper. Firstly,the reference crop evapotranspiration ( ET0)in northern Xinjiang from 1962 to 2010 was calculated with the Penman - Monteith formula,then the temporal -spatial variations of ET0 were analyzed by using the Mann - Kedall test and spatial analysis of ArcGIS. The results show that ET0 in the entire study area had an abrupt change in 1983 and presented a downward trend,which was mainly affected by relative humidity and wind speed there. The reference crop evapotranspiration gradually increased from the northeast and southwest to the center of the northern Xinjiang, and it was slightly higher in the southeast and the west region,which presented an obvious regional difference. The reference crop evapotranspiration from April to October significantly affected the annual distribution of reference evapotranspiration. The results should be useful for identifying an appropriate irrigation system that can be used in the region under environment conditions affected by global warming.

Key words: ArcGIS, evapotranspiration, temporal - spatial characteristics, Northern Xinjiang

摘要:

为明确北疆地区在全球气候变暖背景下合理的灌溉制度,利用北疆地区22个气象站49 a(1962~2010年)的逐日气象资料,运用Penman-Monteith公式计算北疆地区1962~2010年的参考作物蒸散量。ET0(referencecropevapotranspiration),并用Mann-Kendall方法对其进行突变检验,基于ArcGIS9.3空间分析功能模块对北疆参考作物蒸散量进行了空间变化分析。结果表明:研究区域的ET0在1983年发生向下突变,ET0在时间分布上整体呈下降趋势,主要受该地区相对湿度和风速的影响;ET0从北疆的东北部和西南部向中间逐渐升高,东南部和西部表现略高,具有明显的区域差异;4~10月ET0对全年ET0的分布具有显著影响。

 

关键词: ArcGIS, 参考作物蒸散量, 时空特征, 北疆地区

CLC Number: