globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2017796117
论文题名:
Potential for sustainable irrigation expansion in a 3 °c warmer climate
作者: Rosa L.; Chiarelli D.D.; Sangiorgio M.; Beltran-Peña A.A.; Rulli M.C.; D'Odorico P.; Fung I.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:47
起始页码: 29526
结束页码: 29534
语种: 英语
英文关键词: Agriculture ; Climate change ; Sustainable irrigation expansion ; Water scarcity ; Water sustainability
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163927
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Rosa L.,Chiarelli D.D.,Sangiorgio M.,et al. Potential for sustainable irrigation expansion in a 3 °c warmer climate[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(47)
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