气候变化领域集成服务门户(CCPortal): Spatio-Temporal Characteristics and Differences in Snow Density between the Tibet Plateau and the Arctic

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DOI	10.3390/rs15163976
	Spatio-Temporal Characteristics and Differences in Snow Density between the Tibet Plateau and the Arctic
	Zhao, Wenyu; Mu, Cuicui; Wu, Xiaodong; Zhong, Xinyue; Peng, Xiaoqing; Liu, Yijing; Sun, Yanhua; Liang, Benben; Zhang, Tingjun
发表日期	2023
EISSN	2072-4292
卷号	15 期号:16
英文摘要	The Tibet Plateau (TP) and the Arctic are typically cold regions with abundant snow cover, which plays a key role in land surface processes. Knowledge of variations in snow density is essential for understanding hydrology, ecology, and snow cover feedback. Here, we utilized extensive measurements recorded by 697 ground-based snow sites during 1950-2019 to identify the spatio-temporal characteristics of snow density in these two regions. We examined the spatial heterogeneity of snow density for different snow classes, which are from a global seasonal snow cover classification system, with each class determined from air temperature, precipitation, and wind speed climatologies. We also investigated possible mechanisms driving observed snow density differences. The long-term mean snow density in the Arctic was 1.6 times that of the TP. Slight differences were noted in the monthly TP snow densities, with values ranging from 122 +/- 29 to 158 +/- 52 kg/m(3). In the Arctic, however, a clear increasing trend was shown from October to June, particularly with a rate of 30.3 kg/m(3) per month from March to June. For the same snow class, the average snow density in the Arctic was higher than that in the TP. The Arctic was characterized mainly by a longer snowfall duration and deeper snow cover, with some areas showing perennial snow cover. In contrast, the TP was dominated by seasonal snow cover that was shallower and warmer, with less (more) snowfall in winter (spring). The results will be helpful for future simulations of snow cover changes and land interactions at high latitudes and altitudes.
关键词	snow density snow class spatial heterogeneity Tibet Plateau Arctic
英文关键词	ERA5-LAND SOIL-TEMPERATURE; WATER EQUIVALENT; VARIABILITY; RETRIEVAL; REGIONS; COVER; PRECIPITATION; AMPLIFICATION; MOUNTAINS; BIAS
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001055681900001
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/282691
作者单位	Lanzhou University; Chinese Academy of Sciences; Southern Marine Science & Engineering Guangdong Laboratory; Chinese Academy of Sciences; University of Copenhagen
推荐引用方式 GB/T 7714	Zhao, Wenyu,Mu, Cuicui,Wu, Xiaodong,et al. Spatio-Temporal Characteristics and Differences in Snow Density between the Tibet Plateau and the Arctic[J],2023,15(16).
APA	Zhao, Wenyu.,Mu, Cuicui.,Wu, Xiaodong.,Zhong, Xinyue.,Peng, Xiaoqing.,...&Zhang, Tingjun.(2023).Spatio-Temporal Characteristics and Differences in Snow Density between the Tibet Plateau and the Arctic.REMOTE SENSING,15(16).
MLA	Zhao, Wenyu,et al."Spatio-Temporal Characteristics and Differences in Snow Density between the Tibet Plateau and the Arctic".REMOTE SENSING 15.16(2023).