title: Vegetation greenness modelling in response to interannual precipitation and temperature changes between 2001 and 2012 in Liao River Basin in Jilin Province, China.
abstract: BACKGROUND
  Liao River basin in Jilin Province is the place of origin of the Dongliao River. This study gives a comprehensive analysis of the vegetation coverage in the region and provides a potential theoretical basis for ecological restoration.
  
  
  METHODS
  The seasonal variation of vegetation greenness and dynamics based on the Normalized Difference Vegetation Index (NDVI) in major land cover types in the region was studied. Analyzing the relationship NDVI, temperature and rainfall, we derived a set of predictor variables from 2001 to 2012 using the MODIS Terra level 1 Product (MOD02QKM).
  
  
  RESULTS
  The results showed a general increasing trend in NDVI value in the region, while 34.63 % of the region showed degradation. NDVI values begin to rise from April when plants are regreening and they drop in September when temperature are decreasing and the leaves are falling in the study area and temperature was found decreasing during the period of 2001-2012 while rainfall showed an increasing trend. This model could be used to observe the change in vegetation greenness and the dynamic effects of temperature and rainfall.
  
  
  CONCLUSIONS
  This study provided important data for the environmental protection of the basin area. And we hope to provide scientific analysis for controlling water and soil erosion, maintaining the sustainable productivity of land resources, enhancing the treatment of water pollution and stimulating the virtuous cycle of the ecological system.
authors: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China ; College of Environment and Resource, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China.
authors: Xiao-Sheng
authors: XS
authors: Lin
authors: Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China ; College of Environment and Resource, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China.
authors: Jie
authors: J
authors: Tang
authors: College of Environment and Resource, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China.
authors: Zhao-Yang
authors: ZY
authors: Li
authors: College of Environment and Resource, Jilin University, 2699 QianJin Street, Changchun, 130012 Jilin People's Republic of China.
authors: Hai-Yi
authors: HY
authors: Li
keywords: Climatic variability; Correlation analysis; Normalized Difference Vegetation Index (NDVI); Vegetation greenness