Article (Scientific journals)
Spatiotemporal characteristics of reference evapotranspiration and its sensitivity coefficients to climate factors in Huang-Huai-Hai Plain, China
Yang, Jianying; Liu, Qin; Mei, Xurong et al.
2013In Journal of Integrative Agriculture, 12 (12), p. 2280-2291
Peer reviewed
 

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Keywords :
ET0; Spatial distribution; Temporal trends; Sensitivity coefficient; 3H Plain
Abstract :
[en] 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.
Disciplines :
Architecture
Author, co-author :
Yang, Jianying
Liu, Qin ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol. (Paysage)
Mei, Xurong
Yan, Changrong
Ju, Hui
Xu, Jianwen
Language :
English
Title :
Spatiotemporal characteristics of reference evapotranspiration and its sensitivity coefficients to climate factors in Huang-Huai-Hai Plain, China
Publication date :
01 December 2013
Journal title :
Journal of Integrative Agriculture
ISSN :
2095-3119
Publisher :
Elsevier, Netherlands
Volume :
12
Issue :
12
Pages :
2280-2291
Peer reviewed :
Peer reviewed
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