Articles | Volume 26, issue 3
https://doi.org/10.5194/hess-26-827-2022
https://doi.org/10.5194/hess-26-827-2022
Research article
 | 
15 Feb 2022
Research article |  | 15 Feb 2022

Untangling irrigation effects on maize water and heat stress alleviation using satellite data

Peng Zhu and Jennifer Burney

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Cited articles

Bonfils, C. and Lobell, D.: Empirical evidence for a recent slowdown in irrigation-induced cooling, P. Natl. Acad. Sci. USA, 104, 13582–13587, https://doi.org/10.1073/pnas.0700144104, 2007. 
Bruinsma, J.: The resource outlook to 2050: by how much do land, water and crop yields need to increase by 2050?, in: How to feed the World in 2050, Proceedings of a technical meeting of experts, 24–26 June 2009, Rome, Italy, Food and Agriculture Organization of the United Nations (FAO), 1–33, available at: ftp://ftp.fao.org/docrep/fao/012/ak971e/ak971e00.pdf (last access: 6 February 2022), 2009. 
Butler, E. E., Mueller, N. D., and Huybers, P.: Peculiarly pleasant weather for US maize, P. Natl. Acad. Sci. USA, 115, 11935–11940, https://doi.org/10.1073/pnas.1808035115, 2018. 
Chen, F., Xu, X., Barlage, M., Rasmussen, R., Shen, S., Miao, S., and Zhou, G.: Memory of irrigation effects on hydroclimate and its modeling challenge, Environ. Res. Lett., 13, 064009, https://doi.org/10.1088/1748-9326/aab9df, 2018. 
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Short summary
Satellite data were used to disentangle water and heat stress alleviation due to irrigation. Our findings are as follows. (1) Irrigation-induced cooling was captured by satellite LST but air temperature failed. (2) Irrigation extended maize growing season duration, especially during grain filling. (3) Water and heat stress alleviation constitutes 65 % and 35 % of the irrigation benefit. (4) The crop model simulating canopy temperature better captures the irrigation benefit.