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

	Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefifcients to Climate Factors in Huang-Huai-Hai Plain, China
	Yang Jianying 1; Liu Qin 1; Mei Xurong 1; Yan Changrong 1; Ju Hui 1; Xu Jianwen 1
刊名	Journal of Integrative Agriculture
	2013
卷号	12 期号:12 页码:2280-2291
关键词	ET_0 spatial distribution temporal trends sensitivity coefifcient 3H plain
ISSN号	2095-3119
英文摘要	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 (ET_0). In this study, the 51-yr ET_0 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 coefifcients for these key variables was plotted. In addition, the slopes of the linear regression lines for sensitivity coefifcients were obtained. Results showed that ET_0 during winter wheat growing season accounted for the largest proportion of annual ET_0, due to its long phenological days, while ET_0 was detected to decrease signiifcantly 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 ET_0 for summer maize season, and higher sensitive coefifcient value of ET_0 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 ET_0 in winter wheat growing season and declining relativity humidity also primarily controlled a negative trend in ET_0, furthermore the sensitivity coefifcient to relative humidity increased from west to southeast. The eight sensitivity centrals were all found located in Shandong Province. These ET_0 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.
学科主题	农作物
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/16965]
专题	农业环境与可持续发展研究所
作者单位	1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, State Engineering Laboratory of Efficient Water Use and Disaster Reduction for Crops, Ministry of Agriculture 2.Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing, 100081
推荐引用方式 GB/T 7714	Yang Jianying,Liu Qin,Mei Xurong,et al. Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefifcients to Climate Factors in Huang-Huai-Hai Plain, China[J]. Journal of Integrative Agriculture,2013,12(12):2280-2291.
APA	Yang Jianying,Liu Qin,Mei Xurong,Yan Changrong,Ju Hui,&Xu Jianwen.(2013).Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefifcients to Climate Factors in Huang-Huai-Hai Plain, China.Journal of Integrative Agriculture,12(12),2280-2291.
MLA	Yang Jianying,et al."Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefifcients to Climate Factors in Huang-Huai-Hai Plain, China".Journal of Integrative Agriculture 12.12(2013):2280-2291.