干旱区生态环境知识资源中心(Arid): Spatiotemporal Variability in Rainfall Erosivity and Its Teleconnection with Atmospheric Circulation Indices in China

Arid

DOI	10.3390/su16010111
	Spatiotemporal Variability in Rainfall Erosivity and Its Teleconnection with Atmospheric Circulation Indices in China
	Liu, Chenxi; Dong, Manyu; Liu, Qian; Chen, Zhihua; Wang, Yulian
通讯作者	Dong, MY
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2024
卷号	16 期号:1
英文摘要	Rainfall erosivity (RE) is a critical factor influencing soil erosion, and soil erosion is closely related to land ecosystem health and long-term sustainable utilization. To ensure regional stable food supply and ecological balance, it is crucial to study the spatiotemporal distribution and influencing factors of RE. This study focuses on China and its three natural regions using daily precipitation data from 611 stations from 1960 to 2020. The study analyses the spatiotemporal changes in RE. Rainfall events were classified as moderate, large, and heavy based on rainfall intensity. The RE contribution from different rainfall levels to the total RE was analyzed, and the key climatic drivers closely linked to RE were identified using random forest. The results demonstrate that (1) on a national scale, RE shows a significant increasing trend, marked by an 81.67 MJ center dot mm center dot ha-1 center dot h-1/decade. In the subregions, the Eastern Monsoon Region (EMR) and Qinghai-Tibet Plateau Region (QTR) show a significant increasing trend, with a greater change rate in EMR of 108.54 MJ center dot mm center dot ha-1 center dot h-1/decade, and the Northwest Arid Region (NAR) shows a nonsignificant upwards trend. (2) The average RE increases northwest-southeast nationwide, ranging from 60.15 MJ center dot mm center dot ha-1 center dot h-1 to 31,418.52 MJ center dot mm center dot ha-1 center dot h-1. The RE contribution generated by different rainfall levels to the total RE exhibits spatial variations. The dominant types show that EMR is influenced by heavy RE, NAR is dominated by large RE, and QTR is affected by moderate RE. (3) The REs are associated with teleconnection indices, but the impact of these indices varies in different regions. The Western Hemisphere Warm Pool has the greatest impact on the EMR, while the North Atlantic Oscillation and Atlantic Multidecadal Oscillation are the factors influencing RE in NAR and QTR, respectively. (4) On a national scale, for every 1 mm increase in annual total rainfall, the RE increased by 8.54 MJ center dot mm center dot ha-1 center dot h-1, a sensitivity of 8.54 MJ center dot mm center dot ha-1 center dot h-1/mm. For the three subregions, there are differences in the sensitivity of RE to changes in annual precipitation. The highest sensitivity is found in EMR, at 8.71 MJ center dot mm center dot ha-1 center dot h-1/mm, which is greater than the sensitivity indices in NAR (6.19 MJ center dot mm center dot ha-1 center dot h-1/mm) and QTR (3.60 MJ center dot mm center dot ha-1 center dot h-1/mm). This study can provide theoretical references for future regional soil erosion prediction and sustainable agricultural development in China.
英文关键词	rainfall erosivity contribution rates impact factors sensitivity
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:001140312600001
WOS关键词	PEARL RIVER-BASIN ; PRECIPITATION CONCENTRATION ; CLIMATE VARIABILITY ; RISK-ASSESSMENT ; MAINLAND CHINA ; NE SPAIN ; PATTERNS ; TRENDS ; DENSITY ; EVENTS
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405692
推荐引用方式 GB/T 7714	Liu, Chenxi,Dong, Manyu,Liu, Qian,et al. Spatiotemporal Variability in Rainfall Erosivity and Its Teleconnection with Atmospheric Circulation Indices in China[J],2024,16(1).
APA	Liu, Chenxi,Dong, Manyu,Liu, Qian,Chen, Zhihua,&Wang, Yulian.(2024).Spatiotemporal Variability in Rainfall Erosivity and Its Teleconnection with Atmospheric Circulation Indices in China.SUSTAINABILITY,16(1).
MLA	Liu, Chenxi,et al."Spatiotemporal Variability in Rainfall Erosivity and Its Teleconnection with Atmospheric Circulation Indices in China".SUSTAINABILITY 16.1(2024).