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首页> 外文期刊>Nordic hydrology >Spatial and temporal variation of reference evapotranspiration under climate change: a case study in the Sanjiang Plain, Northeast China
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Spatial and temporal variation of reference evapotranspiration under climate change: a case study in the Sanjiang Plain, Northeast China

机译：气候变化下参考蒸散量的时空变化-以东北三江平原为例

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摘要

>It is essential to understand the changing patterns in reference evapotranspiration (ET0) and its relation to climate variables. In this study, meteorological data obtained from the Sanjiang Plain (SJP) between 1959 and 2013 are used to calculate ET0via the Penman–Monteith method. This study analyses the spatial and temporal changes of ET0and determines which meteorological variables have an impact on this. The Mann–Kendall test, moving t-test, sensitivity analysis and simulated results have been used to conduct these analyses. The results demonstrate the following. (1) Spatially, there is an increasing trend in the annual ET0values in agricultural areas. However, significant decreasing trends (P< 0.05) can be found in mountainous regions. (2) Temporally, two abrupt changes can be detected in the early 1980s and the late 1990s for the entire SJP, leading to large inter-annual differences. (3) Sensitivity analysis shows that relative humidity (RH) is the most sensitive climate variable and has a negative influence on ET0, followed by temperature, sunshine duration and wind speed, all of which exert positive impacts. (4) The simulated result shows that ET0is most sensitive to RH. However, significant reductions in wind speed can exert large influences on the ET0values.
机译： >了解参考蒸散量（ET 0 ）及其关系的变化模式至关重要气候变量。在这项研究中，通过Penman–Monteith方法，使用1959年至2013年从三江平原（SJP）获得的气象数据来计算ET 0 。这项研究分析了ET 0 的时空变化，并确定了哪些气象变量对此产生影响。曼恩·肯德尔检验，移动t检验，敏感性分析和模拟结果已用于进行这些分析。结果证明了以下内容。 （1）从空间上看，农业地区年均ET 0 值呈上升趋势。但是，在山区可以发现明显的下降趋势（ P <0.05）。 （2）暂时地，整个SJP在1980年代初和1990年代后期可以检测到两个突变，从而导致较大的年际差异。 （3）敏感性分析表明，相对湿度（RH）是最敏感的气候变量，对ET 0 具有负面影响，其次是温度，日照持续时间和风速，所有这些均产生积极影响。 （4）仿真结果表明，ET 0 对RH最敏感。但是，大幅度降低风速会对ET 0 值产生很大影响。

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  • 来源
    《Nordic hydrology》 |2018年第2期|251-265|共15页
  • 作者

    Xinyi Song; Kui Zhu; Fan Lu; Weihua Xiao;

  • 作者单位

    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China,School of Resources and Earth Science, China University of Mining and Technology, Xuzhou 221116, China;

    School of Resources and Earth Science, China University of Mining and Technology, Xuzhou 221116, China;

    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;

    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    climate change; Penman–Monteith; reference evapotranspiration; Sanjiang Plain;

    机译：气候变化;彭曼-蒙特斯;参考蒸散量;三江平原;

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