气候变化领域集成服务门户(CCPortal): Snow Cover on the Tibetan Plateau and Topographic Controls

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DOI	10.3390/rs15164044
	Snow Cover on the Tibetan Plateau and Topographic Controls
	Chu, Duo; Liu, Linshan; Wang, Zhaofeng
发表日期	2023
EISSN	2072-4292
卷号	15 期号:16
英文摘要	Snow cover plays a critical role in global energy and water cycles. Snow cover on the Tibetan Plateau (TP) provides vital water sources in western China and Himalayan regions, in addition to its weather and climate significance. The massive high mountain topography of the TP is the main condition for the presence and persistence of snow cover on the plateau at the mid-low latitudes of the Northern Hemisphere (NH). However, how the mountain topography controls snow-cover distribution on the TP remains largely unclear, and the relationship is not well quantified. Here, the spatial distribution and the topographic controls of snow cover on the TP are examined based on snow cover frequency (SCF) derived from MODIS snow cover product (MOD10A2 v005) and digital elevation model (DEM) data. The results show that snow cover on the TP is spatially unevenly distributed, and that it is characterized by rich snow and high SCF on the interior and the surrounding high mountain ranges, with less snow and low SCF in inland basins and river valleys. Snow cover on the TP presents elevation dependence: the higher the altitude, the higher the SCF, the longer the snow cover duration, and the more stable the intra-annual variation. The annual mean SCF below 3000 m above sea level (m a.s.l) is less than 4%, and it reaches 77% above 6000 m a.s.l. The intra-annual snow cover variation below 4000 m a.s.l features a unimodal distribution, while above 4000 m a.s.l it presents a bimodal distribution. The mean minimum SCF below 6000 m a.s.l occurs in summer, while above 6000 m a.s.l it occurs in winter. Due to differences in solar radiation and moisture condition caused by the mountain slope and aspect, the mean SCF generally increases with mountain slopes, and it is the highest on the north-facing aspect and the lowest on the south-facing aspect.
关键词	MODIS snow cover DEM topographic elements Tibetan Plateau
英文关键词	NORTHERN XINJIANG; CLIMATE-CHANGE; MODIS; VARIABILITY; VALIDATION; EXTENT
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001056028600001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283779
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. Snow Cover on the Tibetan Plateau and Topographic Controls[J],2023,15(16).
APA	Chu, Duo,Liu, Linshan,&Wang, Zhaofeng.(2023).Snow Cover on the Tibetan Plateau and Topographic Controls.REMOTE SENSING,15(16).
MLA	Chu, Duo,et al."Snow Cover on the Tibetan Plateau and Topographic Controls".REMOTE SENSING 15.16(2023).