Temporal-spatial Variation of Vegetation Coverage Around Hebei Area Based on the NOAA AVHRR Data

doi:10.11924/j.issn.1000-6850.2014-2372

Abstract

Abstract: Based on normalized difference vegetation index (NDVI) data of 83 sites in the Beijing-Tianjin- Hebei Region during recent 29 years (1982-2010), temporal and spatial variations of vegetation cover of the Beijing-Tianjin-Hebei region were studied. The climate tendency rate, correlation analysis, empirical orthogonal function EOF decomposition methods were taken to analyze the basic characteristics of vegetation coverage of the Beijing-Tianjin-Hebei Region from the month, season and year time scale and spatial scale, a detailed analysis. The results showed that : (1) in recent 29 years, vegetation coverage of the Beijing-Tianjin-Hebei Region had a slight increase in the overall trend with heavy inter-annual fluctuations; spring vegetation coverage increased most obviously, followed by that of autumn and winter, summer vegetation change rate and the annual variation had the strongest correlation; vegetation growth period of vegetation coverage were mainly from April to June, the highest growth rate occurred in July, August, October and November had decreasing trends; (2) vegetation distribution of the entire research area had great differences, southern Hebei and northeastern Beijing along Yanshan mountain had the best vegetation coverage (NDVI mean>0.4), low value area are mainly located in northern Zhangjiakou, which Zhangjiakou Kangbao station, its annual average NDVI value was 0.15, the lowest in the study area; EOF analysis showed that, the whole Research area vegetation increased significantly in the region of southern Hebei, the time coefficient showed that vegetation in Beijing-Tianjin-Hebei region increased during 1982-1999, decreased during 2000-2002 and increased significantly during 2003-2010.

向亮, 吴云龙 and 李静. Temporal-spatial Variation of Vegetation Coverage Around Hebei Area Based on the NOAA AVHRR Data[J]. Chinese Agricultural Science Bulletin, 2014, 30(34): 133-139.

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