Effects of Cloud Cover on Surface Sublimation at 4,817 m a.s.l. on the Flat-Top August-One Glacier of the Northern Tibetan Plateau

doi:10.1029/2024EA003778

	Effects of Cloud Cover on Surface Sublimation at 4,817 m a.s.l. on the Flat-Top August-One Glacier of the Northern Tibetan Plateau
	Guo, Shuhai 1; Li, Yueping2 ; Chen, Rensheng 1; Han, Chuntan 1
	2025-02
发表期刊	EARTH AND SPACE SCIENCE
卷号	12 期号:2
摘要	As a crucial role in earth's energy budget, cloud cover exerts great effects on climate change. Although existing sublimation studies across High Mountain Asia (HMA) glaciers have identified the importance of cloud cover in limiting sublimation, the primary/main factors limiting sublimation under high cloud cover conditions are unknown. Based on the 5-year meteorological observation at the top of August-one glacier in the northern Tibetan Plateau (TP), we analyzed the role of cloud cover on meteorological variables and sublimation. The cloud cover over this glacier was found to have distinct effects on the primary meteorological variables, causing the generally negative and positive temperature gradients in clear-sky and overcast conditions, respectively. Additionally, the increase in cloud cover is associated with decreased near-surface humidity gradient and wind speed, which is unfavorable for sublimation. Glacier sublimation was limited in overcast conditions, whereas the sublimation rate was about two-and-half times higher in clear-sky conditions. We noted that the specific humidity gradient and wind speed combined as a more important role in determining sublimation based on the multiple linear regression analysis. Overall, on this westerly dominated glacier, the weak sublimation in overcast conditions was primarily associated with the combined effect of significantly higher air moisture and decreased wind speed. These results contribute to a better understanding of the link between near-surface water vapor exchange between glaciers and the atmosphere.
关键词	Tibetan Plateau August-one glacier cloud cover sublimation
DOI	10.1029/2024EA003778
收录类别	SCIE
语种	英语
WOS研究方向	Astronomy & Astrophysics ; Geology
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS记录号	WOS:001425612700001
出版者	AMER GEOPHYSICAL UNION
原始文献类型	Article
EISSN	2333-5084
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/38812
专题	工商管理学院
通讯作者	Chen, Rensheng
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecol Safety & Sustainable Dev Arid Lands, Lanzhou, Peoples R China; 2.Lanzhou Univ Finance & Econ, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Guo, Shuhai,Li, Yueping,Chen, Rensheng,et al. Effects of Cloud Cover on Surface Sublimation at 4,817 m a.s.l. on the Flat-Top August-One Glacier of the Northern Tibetan Plateau[J]. EARTH AND SPACE SCIENCE,2025,12(2).
APA	Guo, Shuhai,Li, Yueping,Chen, Rensheng,&Han, Chuntan.(2025).Effects of Cloud Cover on Surface Sublimation at 4,817 m a.s.l. on the Flat-Top August-One Glacier of the Northern Tibetan Plateau.EARTH AND SPACE SCIENCE,12(2).
MLA	Guo, Shuhai,et al."Effects of Cloud Cover on Surface Sublimation at 4,817 m a.s.l. on the Flat-Top August-One Glacier of the Northern Tibetan Plateau".EARTH AND SPACE SCIENCE 12.2(2025).