气候变化领域集成服务门户(CCPortal): Potential for sustainable irrigation expansion in a 3 °c warmer climate

CCPortal

DOI	10.1073/pnas.2017796117
	Potential for sustainable irrigation expansion in a 3 °c warmer climate
	Rosa L.; Chiarelli D.D.; Sangiorgio M.; Beltran-Peña A.A.; Rulli M.C.; D'Odorico P.; Fung I.
发表日期	2020
ISSN	0027-8424
起始页码	29526
结束页码	29534
卷号	117 期号:47
英文摘要	Climate change is expected to affect crop production worldwide, particularly in rain-fed agricultural regions. It is still unknown how irrigation water needs will change in a warmer planet and where freshwater will be locally available to expand irrigation without depleting freshwater resources. Here, we identify the rain-fed cropping systems that hold the greatest potential for investment in irrigation expansion because water will likely be available to suffice irrigation water demand. Using projections of renewable water availability and irrigation water demand under warming scenarios, we identify target regions where irrigation expansion may sustain crop production under climate change. Our results also show that global rain-fed croplands hold significant potential for sustainable irrigation expansion and that different irrigation strategies have different irrigation expansion potentials. Under a 3 °C warming, we find that a soft-path irrigation expansion with small monthly water storage and deficit irrigation has the potential to expand irrigated land by 70 million hectares and feed 300 million more people globally. We also find that a hard-path irrigation expansion with large annual water storage can sustainably expand irrigation up to 350 million hectares, while producing food for 1.4 billion more people globally. By identifying where irrigation can be expanded under a warmer climate, this work may serve as a starting point for investigating socioeconomic factors of irrigation expansion andmay guide future research and resources toward those agricultural communities and water management institutions that will most need to adapt to climate change. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Agriculture; Climate change; Sustainable irrigation expansion; Water scarcity; Water sustainability
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160709
作者单位	Rosa, L., Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Chiarelli, D.D., Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, 20133, Italy; Sangiorgio, M., Department of Electronics, Information, and Bioengineering, Politecnico di Milano, Milano, 20133, Italy; Beltran-Peña, A.A., Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Rulli, M.C., Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, 20133, Italy; D'Odorico, P., Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Fung, I., Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States, Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Rosa L.,Chiarelli D.D.,Sangiorgio M.,et al. Potential for sustainable irrigation expansion in a 3 °c warmer climate[J],2020,117(47).
APA	Rosa L..,Chiarelli D.D..,Sangiorgio M..,Beltran-Peña A.A..,Rulli M.C..,...&Fung I..(2020).Potential for sustainable irrigation expansion in a 3 °c warmer climate.Proceedings of the National Academy of Sciences of the United States of America,117(47).
MLA	Rosa L.,et al."Potential for sustainable irrigation expansion in a 3 °c warmer climate".Proceedings of the National Academy of Sciences of the United States of America 117.47(2020).