Temporal and Spatial Variations of Vegetation Cover in Xinjiang from 2002 to 2015 and Their Response to Climate

3rd International Symposium on Earth Observation for Arid and Semi-Arid Environments

Liu, S.S.^1 ; Zhang, Q.^1 ; Li, X.C.^2 ; Song, W.J.^1 ; Yang, J.N.^1 ; Liu, X.J.^2

Institute of Remote Sensing, Digital Earth Chinese Academy of Sciences, Beijing

100094, China^1

College of Information Science and Engineering, Shandong Agricultural University, Taian

271018, China^2

关键词: Annual precipitation;    Climatic factors;    Correlation analysis;    Correlation coefficient;    Meteorological station;    Normalized difference vegetation;    Spatial analysis;    Temporal and spatial variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/74/1/012021/pdf
DOI  :  10.1088/1755-1315/74/1/012021

来源: IOP

【 摘 要 】

In this paper, the dataset of normalized difference vegetation indexes (NDVIs) in the arid region in Xinjiang from 2002 to 2015 as well as the climate data from 52 meteorological stations are utilized and the temporal and spatial variations of NDVI in recent years and their response to temperature and precipitation are analyzed in combination with various methods such as the maximum value analysis, correlation analysis and spatial analysis. It is concluded that in the past 14 years, the annual maximum NDVIs of Xinjiang presented a moderate rising tendency; Under the influence of the global background, the temperature and precipitation also showed different degrees of increase, which showed a significant increase in temperature. The annual maximum NDVI had a significant correlation with the annual precipitation (correlation coefficient: 0.634), but no obvious correlation was identified between the annual maximum NDVI and the annual average temperature (correlation coefficient: 0.279). To this end, regarding to the climatic factors, the influence of precipitation on the vegetation cover is higher than that of temperature.