气候变化领域集成服务门户(CCPortal): Ground Surface Freezing and Thawing Index Distribution in the Qinghai-Tibet Engineering Corridor and Factors Analysis Based on GeoDetector Technique

CCPortal

DOI	10.3390/rs15010208
	Ground Surface Freezing and Thawing Index Distribution in the Qinghai-Tibet Engineering Corridor and Factors Analysis Based on GeoDetector Technique
	Ma, Shen; Zhao, Jingyi; Chen, Ji; Zhang, Shouhong; Dong, Tianchun; Mei, Qihang; Hou, Xin; Liu, Guojun
发表日期	2023
EISSN	2072-4292
卷号	15 期号:1
英文摘要	The land surface temperature obtained from remote sensing was widely used in the simulation of permafrost mapping instead of air temperature with the rapid development of remote sensing technology. The land surface freezing and thawing index (LFI and LTI), which is commonly regarded as the ground surface freezing and thawing index (GFI and GTI), can produce certain errors in the simulation of permafrost distribution on the Qinghai-Tibet Plateau. This paper improved the accuracy of the thermal condition of the surface soil in the Qinghai-Tibet Engineering Corridor (QTEC) by calculating the LFI (or LTI) and N-factors. The environmental factors affecting the spatial distribution of the GFI and GTI were detected by the GeoDetector model. Finally, the multiple linear relationships between the GFI (or GTI) and the environmental factors were established. The results from 25 monitoring sites in the QTEC show that the N-f (ratio of GFI to LFI) is 1.088, and the N-t (ratio of GTI to LTI) is 0.554. The explanatory power of the interaction between elevation and latitude for the GFI and GTI is 79.3% and 85.6%, respectively. The multiple linear regression model with six explanatory variables established by GFI (or GTI) has good accuracy. This study can provide relatively accurate upper boundary conditions for the simulation of permafrost distribution in the QTEC region.
关键词	ground surface freezing index ground surface thawing index N-factors GeoDetector the multiple linear regression model Qinghai-Tibet Engineering Corridor
英文关键词	LAND-SURFACE; PERMAFROST DISTRIBUTION; MAPPING PERMAFROST; THERMAL REGIME; ACTIVE-LAYER; TEMPERATURE; SNOW; AIR; MAP; VARIABILITY
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000987461700001
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/282752
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Ma, Shen,Zhao, Jingyi,Chen, Ji,et al. Ground Surface Freezing and Thawing Index Distribution in the Qinghai-Tibet Engineering Corridor and Factors Analysis Based on GeoDetector Technique[J],2023,15(1).
APA	Ma, Shen.,Zhao, Jingyi.,Chen, Ji.,Zhang, Shouhong.,Dong, Tianchun.,...&Liu, Guojun.(2023).Ground Surface Freezing and Thawing Index Distribution in the Qinghai-Tibet Engineering Corridor and Factors Analysis Based on GeoDetector Technique.REMOTE SENSING,15(1).
MLA	Ma, Shen,et al."Ground Surface Freezing and Thawing Index Distribution in the Qinghai-Tibet Engineering Corridor and Factors Analysis Based on GeoDetector Technique".REMOTE SENSING 15.1(2023).