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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 MountainGlacial erosionIce fluxGlacier reconstructionPalaeoELAs reconstructionTopographic evolutionWidening 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). |
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