气候变化领域集成服务门户(CCPortal): Ice flux of alpine glaciers controls erosion and landscape in the Nianbaoyeze Shan, northeastern Tibetan Plateau

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DOI	10.1007/s11629-022-7769-8
	Ice flux of alpine glaciers controls erosion and landscape in the Nianbaoyeze Shan, northeastern Tibetan Plateau
	Chen, Xiao-jing; Wang, Jie; Zou, Li-yang; Yao, Pan; Lei, Man-hong; Liao, Jing-sheng
发表日期	2023
ISSN	1672-6316
EISSN	1993-0321
起始页码	1884
结束页码	1899
卷号	20 期号:7
英文摘要	The evolution of mountainous topography is the result of the interactions of climate, topography, and erosion. Glaciers are one of the most active erosional forces sculpting mountainous regions. However, our ability to understand this erosional force is limited by the controversy regarding the major factors controlling glacial erosion. We selected the Nianbaoyeze Shan, which is occupied by subcontinental glaciers (likely cold-based or polythermal glaciers) in the northeastern Tibetan Plateau, to study how erosion by alpine glaciers sculpts the landscape. We first applied a power law model (y = ax(b)) fit to the cross-profiles of glacial valleys and analyzed the controlling factor of glacial erosion; we then identified the morphometric characteristics of the cirques to analyze the influencing factors, and investigated the development patterns of glacial valleys and cirques. Finally, we used hypsometry and the slope-altitude curves and reconstructed the palaeo-glacier surfaces and palaeo-Equilibrium Line Altitudes (ELAs) to determine if the glacial buzzsaw effect had impacted this glaciated region with subcontinental glaciers. Our findings show that ice flux is the main factor controlling glacial erosion. In this region, decreasing temperatures promote an increase in glacier mean size (i.e., ice flux), which enhances the rate of glacial erosion. Cirque morphology is mainly influenced by aspect and the ELA. The development patterns of glacial valleys and cirques were dominated by a widening process. The ELAs of Marine Isotope Stage (MIS)-3 derived from the cirque floor altitudes or the Accumulation Area Ratio (AAR) and Area-Altitude Balance Ratio (AABR) coincide with the hypsometric maximum and the reduction in slope-altitude curves, which indicates that glacial buzzsaw has impacted this region. Furthermore, the glacial buzzsaw effect has profoundly influenced the mountain heights and topographic evolution in this subcontinental glaciated region.
关键词	Nianbaoyeze Mountain Glacial erosion Ice flux Glacier reconstruction PalaeoELAs reconstruction Topographic evolution Widening process
英文关键词	CROSS-PROFILE MORPHOLOGY; ROCK MASS STRENGTH; SOUTHERN ALPS; GLACIATED VALLEYS; GIS TOOL; CIRQUES; MOUNTAINS; RELIEF; CLIMATE; RATES
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001035655000006
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283792
作者单位	Lanzhou University; Jiaying University
推荐引用方式 GB/T 7714	Chen, Xiao-jing,Wang, Jie,Zou, Li-yang,et al. Ice flux of alpine glaciers controls erosion and landscape in the Nianbaoyeze Shan, northeastern Tibetan Plateau[J],2023,20(7).
APA	Chen, Xiao-jing,Wang, Jie,Zou, Li-yang,Yao, Pan,Lei, Man-hong,&Liao, Jing-sheng.(2023).Ice flux of alpine glaciers controls erosion and landscape in the Nianbaoyeze Shan, northeastern Tibetan Plateau.JOURNAL OF MOUNTAIN SCIENCE,20(7).
MLA	Chen, Xiao-jing,et al."Ice flux of alpine glaciers controls erosion and landscape in the Nianbaoyeze Shan, northeastern Tibetan Plateau".JOURNAL OF MOUNTAIN SCIENCE 20.7(2023).