干旱区生态环境知识资源中心(Arid): Climate change impacts on regional agricultural irrigation water use in semi-arid environments

Arid

DOI	10.1016/j.agwat.2023.108239
	Climate change impacts on regional agricultural irrigation water use in semi-arid environments
	Tian, Xin; Dong, Jianzhi; Jin, Shuangyan; He, Hai; Yin, Hao; Chen, Xi
通讯作者	Dong, JZ
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	281
英文摘要	Agricultural irrigation water is essential for global food production. Climate change may significantly increase future atmosphere evaporative demand, which can further intensify local water stress, particularly in arid and semi-arid regions. In this study, we investigate climate change impacts on future irrigation water use (IWU) change, with a focus on a semi-arid (Zhangye) region in Northwest China. Specifically, this approach estimates crop water demand using Penman-Monteith-[CO2] equation which is modified to account for atmospheric CO2 concentration impacts. The IWU is then calculated as the difference between crop water demand and effective precipitation. This approach is validated using observed IWU. Combined with climate projections from eight Earth System Models (ESMs), future (up to 2100) IWU changes under different CO2 emission scenarios are evaluated. Results demonstrate that our Penman-Monteith-[CO2] approach is robust in IWU estimation, with a relative error of 2.4% during the validation period of 2015-2020. In the medium emission scenario (SSP245), IWU has a significant increasing trend of 1.4 x 105 m3/yr during 2021-2100, which is mainly attributed to the increased future atmospheric evaporation demand. Interestingly, IWU presents a decreasing trend of -1.3 x 105 m3/yr for the high emission scenario (SSP585). This is because strongly elevated CO2 concentration levels can substantially increase crop water use efficiency - leading to reduced IWU, and this impact outweighs the increased atmospheric evaporation demand in the SSP585 scenario. Therefore, our study suggests that future IWU change is determined by both climate change and crop responses to atmospheric CO2 concentration. Finally, we highlight that adjusting crop patterns can reduce both the IWU mean and variation changes, which can potentially alleviate local water stress.
英文关键词	Climate change Irrigation water use Water saving potential CMIP6 CO2 concentration
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000947393200001
WOS关键词	BIAS CORRECTION ; CO2 ; REQUIREMENTS ; VEGETATION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395057
推荐引用方式 GB/T 7714	Tian, Xin,Dong, Jianzhi,Jin, Shuangyan,et al. Climate change impacts on regional agricultural irrigation water use in semi-arid environments[J],2023,281.
APA	Tian, Xin,Dong, Jianzhi,Jin, Shuangyan,He, Hai,Yin, Hao,&Chen, Xi.(2023).Climate change impacts on regional agricultural irrigation water use in semi-arid environments.AGRICULTURAL WATER MANAGEMENT,281.
MLA	Tian, Xin,et al."Climate change impacts on regional agricultural irrigation water use in semi-arid environments".AGRICULTURAL WATER MANAGEMENT 281(2023).