Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (12): 2280-2291.DOI: 10.1016/S2095-3119(13)60561-4

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Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefficients to Climate Factors in Huang-Huai-Hai Plain, China

 YANG Jian-ying LIU Qin, MEI Xu-rong, YAN Chang-rong JU Hui, XU Jian-wen   

  1. 1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2.State Engineering Laboratory of Efficient Water Use and Disaster Reduction for Crops, Ministry of Agriculture, Beijing 100081, P.R.China
    3.Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, P.R.China
    4.Key Laboratory of Agricultural Environment, Ministry of Agricul ture, Beijing 100081, P.R.China
  • 收稿日期:2013-01-21 出版日期:2013-12-01 发布日期:2013-12-17
  • 通讯作者: MEI Xu-rong, Tel/Fax: +86-10-82109333, E-mail: meixurong@caas.cn
  • 作者简介:YANG Jian-ying, Tel: +86-10-82109773, E-mail: yangjy@ieda.org.cn
  • 基金资助:

    This research was supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2012BAD09B01), the National 973 Program of China (2012CB955904), the Project of Food Security and Climate Change in the Asia-Pacific Region: Evaluating Mismatch between Crop Development and Water Availability and Project of National Non-profit Institute Fund, China- Australia (BSRF201206). We gratefully acknowledge the anonymous reviewers for their valuable comments on the manuscript.

Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefficients to Climate Factors in Huang-Huai-Hai Plain, China

 YANG Jian-ying,  LIU Qin, MEI Xu-rong, YAN Chang-rong,  JU Hui, XU Jian-wen   

  1. 1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2.State Engineering Laboratory of Efficient Water Use and Disaster Reduction for Crops, Ministry of Agriculture, Beijing 100081, P.R.China
    3.Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, P.R.China
    4.Key Laboratory of Agricultural Environment, Ministry of Agricul ture, Beijing 100081, P.R.China
  • Received:2013-01-21 Online:2013-12-01 Published:2013-12-17
  • Contact: MEI Xu-rong, Tel/Fax: +86-10-82109333, E-mail: meixurong@caas.cn
  • About author:YANG Jian-ying, Tel: +86-10-82109773, E-mail: yangjy@ieda.org.cn
  • Supported by:

    This research was supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2012BAD09B01), the National 973 Program of China (2012CB955904), the Project of Food Security and Climate Change in the Asia-Pacific Region: Evaluating Mismatch between Crop Development and Water Availability and Project of National Non-profit Institute Fund, China- Australia (BSRF201206). We gratefully acknowledge the anonymous reviewers for their valuable comments on the manuscript.

摘要: Climate change will have important implications in water shore regions, such as Huang-Huai-Hai (3H) plain, where expected warmer and drier conditions might augment crop water demand. Sensitivity analysis is important in understanding the relative importance of climatic variables to the variation in reference evapotranspiration (ET0). In this study, the 51-yr ET0 during winter wheat and summer maize growing season were calculated from a data set of daily climate variables in 40 meteorological stations. Sensitivity maps for key climate variables were estimated according to Kriging method and the spatial pattern of sensitivity coefficients for these key variables was plotted. In addition, the slopes of the linear regression lines for sensitivity coefficients were obtained. Results showed that ET0 during winter wheat growing season accounted for the largest proportion of annual ET0, due to its long phenological days, while ET0 was detected to decrease significantly with the magnitude of 0.5 mm yr-1 in summer maize growing season. Solar radiation is considered to be the most sensitive and primarily controlling variable for negative trend in ET0 for summer maize season, and higher sensitive coefficient value of ET0 to solar radiation and temperature were detected in east part and southwest part of 3H plain respectively. Relative humidity was demonstrated as the most sensitive factor for ET0 in winter wheat growing season and declining relativity humidity also primarily controlled a negative trend in ET0, furthermore the sensitivity coefficient to relative humidity increased from west to southeast. The eight sensitivity centrals were all found located in Shandong Province. These ET0 along with its sensitivity maps under winter wheat-summer maize rotation system can be applied to predict the agricultural water demand and will assist water resources planning and management for this region.

关键词: ET0 , spatial distribution , temporal trends , sensitivity coefficient , 3H plain

Abstract: Climate change will have important implications in water shore regions, such as Huang-Huai-Hai (3H) plain, where expected warmer and drier conditions might augment crop water demand. Sensitivity analysis is important in understanding the relative importance of climatic variables to the variation in reference evapotranspiration (ET0). In this study, the 51-yr ET0 during winter wheat and summer maize growing season were calculated from a data set of daily climate variables in 40 meteorological stations. Sensitivity maps for key climate variables were estimated according to Kriging method and the spatial pattern of sensitivity coefficients for these key variables was plotted. In addition, the slopes of the linear regression lines for sensitivity coefficients were obtained. Results showed that ET0 during winter wheat growing season accounted for the largest proportion of annual ET0, due to its long phenological days, while ET0 was detected to decrease significantly with the magnitude of 0.5 mm yr-1 in summer maize growing season. Solar radiation is considered to be the most sensitive and primarily controlling variable for negative trend in ET0 for summer maize season, and higher sensitive coefficient value of ET0 to solar radiation and temperature were detected in east part and southwest part of 3H plain respectively. Relative humidity was demonstrated as the most sensitive factor for ET0 in winter wheat growing season and declining relativity humidity also primarily controlled a negative trend in ET0, furthermore the sensitivity coefficient to relative humidity increased from west to southeast. The eight sensitivity centrals were all found located in Shandong Province. These ET0 along with its sensitivity maps under winter wheat-summer maize rotation system can be applied to predict the agricultural water demand and will assist water resources planning and management for this region.

Key words: ET0 , spatial distribution , temporal trends , sensitivity coefficient , 3H plain