Characteristics of Spatio-temporal Variation of NDVI in Different Ecological Function Zones in North Xinjiang in Recent 30 Years

doi:10.13466/j.cnki.lyzygl.2015.06.013

Abstract

Abstract: Spatial and temporal variations of NDVI can not only reflect the changing trend of the ecological environment,but also reveal the recovery situation and degeneration of regional vegetation.According to the data of time series,which were GIMMS NDVI from 1981 to 2003 and SPOT VGT NDVI from year 1998 to 2010,this paper analyzed the spatial and temporal variations of ecological function area and NDVI of different vegetation types of northern Xinjiang in recent 30 years,with the maximum synthesis method of NDVI and the trend analysis method.The results showed as follows(1)From the perspective of functional areas in Northern Xinjiang,the average value of NDVI grew slowly and changed with the periodic fluctuation during the period from 1981 to 2003,while as a turning period in 2002,the improvement of the whole vegetation enhanced continuously.(2)From the perspective of different ecological function districts,the vegetation of ecological function areas in Yili River Valley,the northern slope of Tianshan Mountains and the south of Altai Mountains were obviously improved during the period from 1981 to 2003,while the vegetation of desert ecological area and eastern region of the Junggar basin were degenerated mildly.The vegetation in most parts of northern Xinjiang restored significantly during the period from 1998 to 2010,and the vegetation improvement reached the extremely significant level in the Yili River Valley and the plain oasis area in the middle of the northern slope of Tianshan Mountains.(3)The improvement or degradation trends of vegetation in northern Xinjiang may be related to the implementation of ecological construction and the overall regional climate change during the same period.

Key words: North Xinjiang, time-series NDVI data, trend analysis, vegetation, spatio-temporal variation

CLC Number:

Q948.1

WANG Jiping,GUO Zhongjun,HUANG jihong,ZANG Runguo,LIU Xuan. Characteristics of Spatio-temporal Variation of NDVI in Different Ecological Function Zones in North Xinjiang in Recent 30 Years[J]. FOREST RESOURCES WANAGEMENT, 2015, (6): 64-70.

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