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High positive correlation between soil temperature and NDVI from 1982 to 2006 in alpine meadow of the Three-River Source Region on the Qinghai-Tibetan Plateau
Xu, Weixin2,3,4; Gu, Song1,2; Zhao, XinQuan2; Xiao, Jianshe3; Tang, Yanhong5; Fang, Jingyun6; Zhang, Juan3; Jiang, Sha1
2011-08-01
Source PublicationINTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
ISSN0303-2434
Volume13Issue:4Pages:528-535
SubtypeArticle
AbstractUsing satellite-observed Normalized Difference Vegetation Index (NDVI) data and Rotated Empirical Orthogonal Function (REOF) method, we analyzed the spatio-temporal variation of vegetation during growing seasons from May to September in the Three-River Source Region, alpine meadow in the Qinghai-Tibetan Plateau from 1982 to 2006. We found that NDVI in the centre and east of the region, where the vegetation cover is low, showed a consistent but slight increase before 2003 and remarkable increase in 2004 and 2005. Impact factors analysis indicted that among air temperature, precipitation, humid index, soil surface temperature, and soil temperature at 10 cm and 20 cm depth, annual variation of NDVI was highly positive correlated with the soil surface temperature of the period from March to July. Further analysis revealed that the correlation between the vegetation and temperature was insignificant before 1995, but statistically significant from 1995. The study indicates that temperature is the major controlling factor of vegetation change in the Three-River Source Region, and the currently increase of temperature may increase vegetation coverage and/or density in the area. In addition, ecological restoration project started from 2005 in Three-River Source Region has a certain role in promoting the recovery of vegetation. (C) 2011 Elsevier B.V. All rights reserved.; Using satellite-observed Normalized Difference Vegetation Index (NDVI) data and Rotated Empirical Orthogonal Function (REOF) method, we analyzed the spatio-temporal variation of vegetation during growing seasons from May to September in the Three-River Source Region, alpine meadow in the Qinghai-Tibetan Plateau from 1982 to 2006. We found that NDVI in the centre and east of the region, where the vegetation cover is low, showed a consistent but slight increase before 2003 and remarkable increase in 2004 and 2005. Impact factors analysis indicted that among air temperature, precipitation, humid index, soil surface temperature, and soil temperature at 10 cm and 20 cm depth, annual variation of NDVI was highly positive correlated with the soil surface temperature of the period from March to July. Further analysis revealed that the correlation between the vegetation and temperature was insignificant before 1995, but statistically significant from 1995. The study indicates that temperature is the major controlling factor of vegetation change in the Three-River Source Region, and the currently increase of temperature may increase vegetation coverage and/or density in the area. In addition, ecological restoration project started from 2005 in Three-River Source Region has a certain role in promoting the recovery of vegetation. (C) 2011 Elsevier B.V. All rights reserved.
KeywordNdvi (Normalized Differential Vegetation Index) Qinghai-tibetan Plateau Temperature Vegetation
WOS HeadingsScience & Technology ; Technology
WOS KeywordEMPIRICAL ORTHOGONAL FUNCTIONS ; NET PRIMARY PRODUCTIVITY ; CLIMATE-CHANGE ; TEMPORAL VARIATIONS ; HEADWATERS REGION ; VEGETATION INDEX ; SATELLITE DATA ; CHINA ; DEGRADATION ; PROVINCE
Indexed BySCI
Language英语
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000292489900002
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1526
Collection中国科学院西北高原生物研究所
Affiliation1.Nankai Univ, Coll Life Sci, Tianjin 300071, Peoples R China
2.Chinese Acad Sci, NW Inst Plateau Biol, Xining, Peoples R China
3.Meteorol Inst Qinghai Prov, Xining, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
5.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
6.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Xu, Weixin,Gu, Song,Zhao, XinQuan,et al. High positive correlation between soil temperature and NDVI from 1982 to 2006 in alpine meadow of the Three-River Source Region on the Qinghai-Tibetan Plateau[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2011,13(4):528-535.
APA Xu, Weixin.,Gu, Song.,Zhao, XinQuan.,Xiao, Jianshe.,Tang, Yanhong.,...&Jiang, Sha.(2011).High positive correlation between soil temperature and NDVI from 1982 to 2006 in alpine meadow of the Three-River Source Region on the Qinghai-Tibetan Plateau.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,13(4),528-535.
MLA Xu, Weixin,et al."High positive correlation between soil temperature and NDVI from 1982 to 2006 in alpine meadow of the Three-River Source Region on the Qinghai-Tibetan Plateau".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 13.4(2011):528-535.
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