气候变化领域集成服务门户(CCPortal): Effects of Potential Large-Scale Irrigation on Regional Precipitation in Northwest China

CCPortal

DOI	10.3390/rs16010058
	Effects of Potential Large-Scale Irrigation on Regional Precipitation in Northwest China
	Huang, Ya; Zhao, Yong; Gong, Boya; Yang, Jing; Li, Yanping
发表日期	2024
EISSN	2072-4292
起始页码	16
结束页码	1
卷号	16 期号:1
英文摘要	Understanding the impact of irrigation on the spatiotemporal characteristics of precipitation is important for the ecological stability of the arid region of Northwest China (NWC). In this study, the global climate model MPI-ESM-MR is utilized to provide the initial and lateral boundary conditions for the regional climate model RegCM4, enabling the simulation of the long-term climate of the arid NWC region under two Representative Concentration Pathways (RCPs). The study focuses on analyzing the differences in the spatiotemporal distribution, intensity, and frequency of precipitation before and after irrigation. Furthermore, the study explores the primary factors influencing changes in the spatiotemporal distribution characteristics of precipitation in the irrigation district and its downwind region. The results indicate that RegCM4 performs well in simulating the climatology and diurnal cycle of precipitation in the NWC, particularly excelling during the summer. Large-scale irrigation significantly impacts the structure of summer precipitation, leading to a notable increase in convective precipitation near the irrigation district and surrounding mountain ranges. Anomalous cyclonic circulation and enhanced vertical velocity enhancement provide dynamic conditions for increased precipitation in the irrigation district and surrounding mountainous regions. Furthermore, the evaporation of water vapor resulting from large-scale irrigation serves as an additional source of moisture, contributing to increased precipitation in the irrigation district and its downwind region. Due to the difference in climatic conditions between the western and eastern regions around the irrigated areas, the summer extreme precipitation in the west predominantly increases. At the same time, in the east, it predominantly decreases due to irrigation. The findings of this study contribute to a deeper understanding of the physical mechanisms through which agricultural irrigation influences precipitation in the arid region of the NWC, thereby providing scientific evidence for the sustainable utilization of water resources in the region.
英文关键词	agricultural irrigation; extreme precipitation; regional climate; northwest China
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001140436800001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303170
作者单位	Hohai University; Hohai University; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Huang, Ya,Zhao, Yong,Gong, Boya,et al. Effects of Potential Large-Scale Irrigation on Regional Precipitation in Northwest China[J],2024,16(1).
APA	Huang, Ya,Zhao, Yong,Gong, Boya,Yang, Jing,&Li, Yanping.(2024).Effects of Potential Large-Scale Irrigation on Regional Precipitation in Northwest China.REMOTE SENSING,16(1).
MLA	Huang, Ya,et al."Effects of Potential Large-Scale Irrigation on Regional Precipitation in Northwest China".REMOTE SENSING 16.1(2024).