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(Article of periodic en Anglais - 2011)

Document title

Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers

Authors(s) and Affiliation(s)

YANG Z. (1) ; GAO J. (1) ; ZHOU C. (2) ; SHI P. (2) ; ZHAO L. (3) ; SHEN W. (1) ; OUYANG H. (2) ;
(1) Nanjing Inst. of Environmental Sciences, Ministry of Environmental Protection, Nanjing, CHINE
(2) Inst. of Geographic Sciences and Natural Resources Research, Beijing, CHINE
(3) Observation and Research Station of Qinghai-Tibet Plateau, CAREERI, CAS, Lanzhou, CHINE

Abstract

The spatial distribution and dynamic change of vegetation cover in the source regions of the Yangtze and Yellow rivers are analyzed in recent 10 years based on 1-km resolution multi-temporal SPOTVGT-DN data from 1998 to 2007. Meanwhile, the correlation relationships between air temperature, precipitation, shallow ground temperature and NDVI, which is 3×3 pixel at the center of Wudaoliang, Tuotuohe, Qumalai, Maduo, and Dari meteorological stations were analyzed. The results show that the NDVI values in these 2 source regions are increasing in recent 10 years. Spatial distribution of NDVI which was consistent with hydrothermal condition decreased from southeast to northwest of the source regions. Shallow ground temperature had the greatest effect on NDVI change, and the second greatest factor influencing NDVI was average temperature. The correlation between NDVI and shallow ground temperature in the source regions of the Yangtze and Yellow rivers increased significantly with the depth of soil layer

Source

Article of periodic

published at : Journal of geographical sciences. Acta geographica sinica / ISSN 1009-637X

Editor : CHINE

Millesime : 2011, vol. 21, no6 [pp. 979-993]

Bibliographic references : 2 p.

Collation : 7 fig.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1007/s11442-011-0894-x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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