Grassland coverage inter-annual variation and its coupling relation with hydrothermal factors in China during 1982–2010

Auteur(s) et Affiliation(s)



Description :
In this study, GIMMS (Global Inventory Modeling and Mapping Studies) NDVI (Normalised Difference Vegetation Index) from 1982 to 2006 and MODIS (Moderate Resolution Imaging Spectroradiometer) NDVI from 2001 to 2010 were used to calculate grass coverage and their spatial-temporal dynamics. The response of grass coverage to climatic variations at annual and monthly time scales was analyzed. Grass coverage distribution had increased from northwest to southeast across China. At the monthly time-scale, there are significant correlations between grass coverage with both temperature and precipitation, indicating that the grass coverage is more affected by seasonal fluctuations of hydrothermal conditions. The AA. find the climatic restrictive factors for each grassland type. Additionally, there is one-month time lag-effect between grass coverage and climate factors for each grassland types.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2014, vol. 24, n°. 4, p. 593-611, nombre de pages : 19, Références bibliographiques : 46 ref.

Date :
2014

Editeur :
Pays édition : Chine