气候变化领域集成服务门户(CCPortal): Spatiotemporal Patterns and Regional Differences in Soil Thermal Conductivity on the Qinghai-Tibet Plateau

CCPortal

DOI	10.3390/rs15041168
	Spatiotemporal Patterns and Regional Differences in Soil Thermal Conductivity on the Qinghai-Tibet Plateau
	Liu, Wenhao; Li, Ren; Wu, Tonghua; Shi, Xiaoqian; Zhao, Lin; Wu, Xiaodong; Hu, Guojie; Yao, Jimin; Wang, Dong; Xiao, Yao; Ma, Junjie; Jiao, Yongliang; Wang, Shenning; Zou, Defu; Zhu, Xiaofan; Chen, Jie; Shi, Jianzong; Qiao, Yongping
发表日期	2023
EISSN	2072-4292
卷号	15 期号:4
英文摘要	The Qinghai-Tibet Plateau is an area known to be sensitive to global climate change, and the problems caused by permafrost degradation in the context of climate warming potentially have far-reaching effects on regional hydrogeological processes, ecosystem functions, and engineering safety. Soil thermal conductivity (STC) is a key input parameter for temperature and surface energy simulations of the permafrost active layer. Therefore, understanding the spatial distribution patterns and variation characteristics of STC is important for accurate simulation and future predictions of permafrost on the Qinghai-Tibet Plateau. However, no systematic research has been conducted on this topic. In this study, based on a dataset of 2972 STC measurements, we simulated the spatial distribution patterns and spatiotemporal variation of STC in the shallow layer (5 cm) of the Qinghai-Tibet Plateau and the permafrost area using a machine learning model. The monthly analysis results showed that the STC was high from May to August and low from January to April and from September to December. In addition, the mean STC in the permafrost region of the Qinghai-Tibet Plateau was higher during the thawing period than during the freezing period, while the STC in the eastern and southeastern regions is generally higher than that in the western and northwestern regions. From 2005 to 2018, the difference between the STC in the permafrost region during the thawing and freezing periods gradually decreased, with a slight difference in the western hinterland region and a large difference in the eastern region. In areas with specific landforms such as basins and mountainous areas, the changes in the STC during the thawing and freezing periods were different or even opposite. The STC of alpine meadow was found to be most sensitive to the changes during the thawing and freezing periods within the permafrost zone, while the STC for bare land, alpine desert, and alpine swamp meadow decreased overall between 2005 and 2018. The results of this study provide important baseline data for the subsequent analysis and simulation of the permafrost on the Qinghai-Tibet Plateau.
关键词	soil thermal conductivity permafrost climate change freeze-thaw period Qinghai-Tibet Plateau machine learning
英文关键词	FREEZE-THAW PROCESSES; WATER-CONTENT; PERMAFROST PROPERTIES; WIDE-RANGE; SANDY SOIL; MODEL; TEMPERATURE; PARAMETERS; DATASET; PROBE
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000941767200001
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/282584
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; China National Petroleum Corporation; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Liu, Wenhao,Li, Ren,Wu, Tonghua,et al. Spatiotemporal Patterns and Regional Differences in Soil Thermal Conductivity on the Qinghai-Tibet Plateau[J],2023,15(4).
APA	Liu, Wenhao.,Li, Ren.,Wu, Tonghua.,Shi, Xiaoqian.,Zhao, Lin.,...&Qiao, Yongping.(2023).Spatiotemporal Patterns and Regional Differences in Soil Thermal Conductivity on the Qinghai-Tibet Plateau.REMOTE SENSING,15(4).
MLA	Liu, Wenhao,et al."Spatiotemporal Patterns and Regional Differences in Soil Thermal Conductivity on the Qinghai-Tibet Plateau".REMOTE SENSING 15.4(2023).