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	Impact of climatic factors on permafrost of the qinghai-xizang plateau in the time-frequency domain
	Gao, Siru1,3; Wu, Qingbai1,2; Zhang, Zhongqiong1; Xu, Xiaoming1,3
刊名	Quaternary international
	2015-07-10
卷号	374页码:110-117
关键词	Qinghai-xizang plateau Permafrost Climatic factors Wavelet analysis Grey incidence analysis
ISSN号	1040-6182
DOI	10.1016/j.quaint.2015.02.036
通讯作者	Gao, siru(gaosiru@lzb.ac.cn)
英文摘要	A combined time-frequency analysis provides a more profound understanding of the impacts of various climatic factors on permafrost. morlet wavelet transformation was used to detect multiple periodicities in monthly soil temperatures, as well as data for five climatic factors over the interval from 1996 to 2010 on the qinghai-xizang plateau. these periodic relationships were further analyzed in the time-frequency domain. our results indicated that four of the five climatic factors have multiple periods: air temperature has an 18 months period, downward longwave radiation (lwd) had periods of 9, 18,142 and 176 months, downward shortwave radiation (swd) had periods of 9, 18, 122 and 174 months, precipitation had periods of 9, 18, 68 and 138 months, while wind speed had periods of 9, 18, 28, 58, 122 and 178 months. soil temperatures had quasi-periodic variations of 9, 18, 41, 110 and 176 months at 0.5 m depth; and had periods of 9, 18, 68-71, 120 and 169-173 months at 6 m depth. a relationship analysis of these periodicities indicated that the multiple periodicities in soil temperature were mainly controlled by periodicities in climate change. in particular, the periodicity in air temperature had the greatest effect on soil temperatures at 0.5 m depth, while lwd had the greatest effect on permafrost temperatures at 6 m depth based on a grey incidence analysis. (c) 2015 elsevier ltd and inqua. all rights reserved.
WOS关键词	WAVELET ANALYSIS ; TIBETAN PLATEAU ; SCALE ; VARIABILITY ; HIGHWAY ; DATASET ; ASIA
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000356452500010
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376448
专题	中国科学院大学
通讯作者	Gao, Siru
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gao, Siru,Wu, Qingbai,Zhang, Zhongqiong,et al. Impact of climatic factors on permafrost of the qinghai-xizang plateau in the time-frequency domain[J]. Quaternary international,2015,374:110-117.
APA	Gao, Siru,Wu, Qingbai,Zhang, Zhongqiong,&Xu, Xiaoming.(2015).Impact of climatic factors on permafrost of the qinghai-xizang plateau in the time-frequency domain.Quaternary international,374,110-117.
MLA	Gao, Siru,et al."Impact of climatic factors on permafrost of the qinghai-xizang plateau in the time-frequency domain".Quaternary international 374(2015):110-117.

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