全球智库信息集成服务系统(G2TT): Regional disparities in the beneficial effects of rising CO2 concentrations on crop water productivity.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1038/NCLIMATE2995
	Regional disparities in the beneficial effects of rising CO2 concentrations on crop water productivity.
	Deryng D; Elliott J; Folberth C; Müller C; Pugh TAM; Boote KJ; Conway D; Ruane AC
发表日期	2016
出处	Nature Climate Change 6 (4): 1-8
出版年	2016
语种	英语
摘要	Rising atmospheric CO2 concentrations ([CO2]) are expected to enhance photosynthesis and reduce crop water use1. However, there is high uncertainty about the global implications of these effects for future crop production and agricultural water requirements under climate change. Here we combine results from networks of field experiments1, 2 and global crop models3 to present a spatially explicit global perspective on crop water productivity (CWP, the ratio of crop yield to evapotranspiration) for wheat, maize, rice and soybean under elevated [CO2] and associated climate change projected for a high-end greenhouse gas emissions scenario. We find CO2 effects increase global CWP by 10[0;47]%–27[7;37]% (median[interquartile range] across the model ensemble) by the 2080s depending on crop types, with particularly large increases in arid regions (by up to 48[25;56]% for rainfed wheat). If realized in the fields, the effects of elevated [CO2] could considerably mitigate global yield losses whilst reducing agricultural consumptive water use (4–17%). We identify regional disparities driven by differences in growing conditions across agro-ecosystems that could have implications for increasing food production without compromising water security. Finally, our results demonstrate the need to expand field experiments and encourage greater consistency in modelling the effects of rising [CO2] across crop and hydrological modelling communities.
主题	Ecosystems Services and Management (ESM)
关键词	Agriculture Climate Change Impacts Water Resources
URL	http://pure.iiasa.ac.at/id/eprint/12884/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/130629
推荐引用方式 GB/T 7714	Deryng D,Elliott J,Folberth C,et al. Regional disparities in the beneficial effects of rising CO2 concentrations on crop water productivity.. 2016.