气候变化领域集成服务门户(CCPortal): Spatial Distribution of Snow Cover in Tibet and Topographic Dependence

CCPortal

DOI	10.3390/atmos14081284
	Spatial Distribution of Snow Cover in Tibet and Topographic Dependence
	Chu, Duo; Liu, Linshan; Wang, Zhaofeng
发表日期	2023
EISSN	2073-4433
卷号	14 期号:8
英文摘要	Many major river systems in Asia, such as the Yangtze, Yarlung Zangbo, Indus, Ganges and Salween originate in the Tibetan mountains and snow cover in Tibet provides substantial water resources for these rivers, in addition to its weather-related and climatic significance. The high mountain terrain of Tibet is the main condition that snow cover exists and persists at mid-low altitudes. However, the relationships between snow cover and topographic factors of the plateau have not been fully addressed. In this study, the overall spatial distribution of snow cover and the impacts of topography (elevation, aspect and slope) on snow cover distribution in Tibet were analyzed based on the MODIS snow cover product and digital elevation model (DEM) using GIS spatial analysis techniques. The results showed that (1) snow cover in Tibet is spatially very uneven and is characterized by rich snow and high SCF (snow cover frequency) on Nyainqentanglha mountain and the surrounding high mountains, with less snow and a low SCF in the southern Tibetan valley and central part of northern Tibet. (2) Snow cover in Tibet has a strong elevation dependence and a higher SCF corresponds well with high mountain ranges. The mean SCF below 2000 m above sea level (m a.s.l) was less than 4%, while above 6000 m a.s.l, it reached 75%. (3) Intra-annual snow cover distribution below 4000 m a.s.l was characterized by unimodal patterns, while above 4000 m a.s.l, it was characterized by bimodal patterns. The lowest SCF below 6000 m a.s.l occurred in summer, while above 6000 m it occurred in winter. (4) The mountain slope and aspect affect snow cover distribution through changing radiation and energy balances in the mountain regions. The mean SCF generally increased with mountain slopes, with the highest on the north-facing aspect and the lowest on the south-facing aspect.
关键词	snow cover frequency topographic elements MODIS data SRTM DEM Tibet
英文关键词	NORTHERN XINJIANG; CLIMATE-CHANGE; MODIS; VARIABILITY; VALIDATION; PLATEAU; RUNOFF; IMPACT; SRTM; ASIA
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001056203000001
来源期刊	ATMOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282554
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS
推荐引用方式 GB/T 7714	Chu, Duo,Liu, Linshan,Wang, Zhaofeng. Spatial Distribution of Snow Cover in Tibet and Topographic Dependence[J],2023,14(8).
APA	Chu, Duo,Liu, Linshan,&Wang, Zhaofeng.(2023).Spatial Distribution of Snow Cover in Tibet and Topographic Dependence.ATMOSPHERE,14(8).
MLA	Chu, Duo,et al."Spatial Distribution of Snow Cover in Tibet and Topographic Dependence".ATMOSPHERE 14.8(2023).