Period analysis and trend forecast for soil temperature in the Qinghai-Xizang Highway by wavelet transformation (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Period analysis and trend forecast for soil temperature in the Qinghai-Xizang Highway by wavelet transformation (SCI)
	Gao S. R.; Wu Q. B.
刊名	Environmental Earth Sciences
	2015
卷号	74 期号:4 页码:2883-2891
英文摘要	Soil temperature is a key factor in engineering design, construction and operation involved in permafrost engineering, and is closely associated with engineering stability. Here, the study shows that the wavelet transformation analysis method provides a better understanding of soil temperature in the time-frequency domain. Semimonthly soil temperature time series for two monitoring sites along the Qinghai-Xizang Highway were analyzed using wavelet analysis from 1996 to 2012. Periodic characteristics and trends in soil temperature were determined. The results show that soil temperatures under natural ground and embankment settings have similar periodic change at both sites. Six periods of 18, 36, 78, 130, 220 and 342 half-months were observed. Cold/warm cycles in soil temperature were qualitatively appraised using Morlet wavelets for soil temperatures at these two sites over a cold period in 2012, as well as for soil temperature below embankment at site no. 5 over a warm period. The changes in soil temperature were quantitatively appraised by decomposing and reconstructing soil temperature using dbN wavelets; soil temperature at both sites showed an increasing trend over the past 17 years, with a rise in soil temperature under the natural ground and the embankment corresponding to 0.022 and 0.072 A degrees C a(-1) in warm permafrost and 0.048 and 0.007 A degrees C a(-1) in cold permafrost.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27451]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Gao S. R.,Wu Q. B.. Period analysis and trend forecast for soil temperature in the Qinghai-Xizang Highway by wavelet transformation (SCI)[J]. Environmental Earth Sciences,2015,74(4):2883-2891.
APA	Gao S. R.,&Wu Q. B..(2015).Period analysis and trend forecast for soil temperature in the Qinghai-Xizang Highway by wavelet transformation (SCI).Environmental Earth Sciences,74(4),2883-2891.
MLA	Gao S. R.,et al."Period analysis and trend forecast for soil temperature in the Qinghai-Xizang Highway by wavelet transformation (SCI)".Environmental Earth Sciences 74.4(2015):2883-2891.