气候变化领域集成服务门户(CCPortal): Morphological characteristics and dynamic changes of typical climbing dunes on the Qinghai-Tibet Plateau

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DOI	10.1016/j.geomorph.2023.108869
	Morphological characteristics and dynamic changes of typical climbing dunes on the Qinghai-Tibet Plateau
	Dong, Miao; Yan, Ping; Wang, Xiaoxu; Zhang, Xiao; Wu, Wei; Wang, Yong; Meng, Xiaonan; Ji, Xinran; Wang, Yijiao; Li, Xiaomei; Xu, Peipei
发表日期	2023
ISSN	0169-555X
EISSN	1872-695X
卷号	440
英文摘要	Climbing dunes are a form of topographic barrier dunes that feature in the aeolian landforms on the Qinghai Tibetan Plateau. Topography fundamentally influences the spatial distribution and morphological characteristics of climbing dunes by modifying the near-surface airflow and creating space for sediment deposition. Previous studies have considered several aspects of the influence of topography on aeolian landforms. However, morphological differences between climbing dunes in different geomorphic contexts and dynamic changes in the area have received little attention. Therefore, topographic measurements, near-surface flow field measurements, dune morphology analysis, and remote sensing image analysis were combined to explore relationships between dune morphology and topography. Topographic obstacles can accelerate the near-surface airflow, particularly with a 25-35 degrees slope gradient, which is beneficial for sand transport and deposition. Suitable accommodation space (concave slope morphology) and abundant sediment comprise the primary factors that control the scale and morphological diversity of climbing dunes, which are also influenced by a variable wind direction. In general, the morphology of the climbing dunes becomes progressively more complicated from the bottom to the middle of the windward slope, and the sand ridge lines of the dunes are perpendicular to the prevailing wind direction. Based on the influence of climate and human activities, the total area of climbing dunes in this region has decreased over the past 30 years. Despite general evidence of enhanced human-induced desertification in semi-arid and sub-humid regions, warming has not led to the rapid expansion of climbing dunes in these arid locations. This research offers new insights into the relationship between the terrain and dune morphology, enriching the theoretical basis for the plateau aeolian geomorphology. Furthermore, it allows us to consider the dynamic changes in climbing dunes area in the context of global warming.
关键词	Climbing dunes Near-surfaced airflow Slope morphology Dune morphology Qinghai-Tibet Plateau
英文关键词	SAND RAMPS; CLASSIFICATION; SLOPE
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001064779600001
来源期刊	GEOMORPHOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282928
作者单位	Taiyuan Normal University; Beijing Normal University; Beijing Normal University; Beijing Normal University; Hubei Normal University; Henan Academy of Sciences; Shaanxi Normal University; Anhui Normal University
推荐引用方式 GB/T 7714	Dong, Miao,Yan, Ping,Wang, Xiaoxu,et al. Morphological characteristics and dynamic changes of typical climbing dunes on the Qinghai-Tibet Plateau[J],2023,440.
APA	Dong, Miao.,Yan, Ping.,Wang, Xiaoxu.,Zhang, Xiao.,Wu, Wei.,...&Xu, Peipei.(2023).Morphological characteristics and dynamic changes of typical climbing dunes on the Qinghai-Tibet Plateau.GEOMORPHOLOGY,440.
MLA	Dong, Miao,et al."Morphological characteristics and dynamic changes of typical climbing dunes on the Qinghai-Tibet Plateau".GEOMORPHOLOGY 440(2023).