摘要
Based on Normalized Difference Vegetation Index (NDVI) data and meteorological observation data,NDVI data were converted into coverage to analyze the variation of vegetation coverage and its relationship with temperature,precipitation and evaporation in Liupanshan.The results showed that vegetation coverage in Liupanshan was in a state of fluctuation mainly caused by climate change.The obvious seasonal difference of vegetation coverage was relegated to natural grassland vegetation restoration and converting farmland to forest.Precipitation in northern Liupanshan had great effect on vegetation growth in every season,so did in spring in the middle part,and it affected vegetation growth in southern Liupanshan slightly.Temperature showed little influence on vegetation growth in each season in northern Liupanshan and great influence on vegetation growth in spring and summer in the middle part and southern Liupanshan,and it was positive correlation in spring and negative correlation in summer.Very good agreement was found among the influences of evaporation on coverage in Liupanshan region,and the evaporation in spring and summer had negative relativity with vegetation coverage in summer,whereas there was a significant positive correlation between evaporation and vegetation coverage in winter.
Based on Normalized Difference Vegetation Index (NDVI) data and meteorological observation data,NDVI data were converted into coverage to analyze the variation of vegetation coverage and its relationship with temperature,precipitation and evaporation in Liupanshan.The results showed that vegetation coverage in Liupanshan was in a state of fluctuation mainly caused by climate change.The obvious seasonal difference of vegetation coverage was relegated to natural grassland vegetation restoration and converting farmland to forest.Precipitation in northern Liupanshan had great effect on vegetation growth in every season,so did in spring in the middle part,and it affected vegetation growth in southern Liupanshan slightly.Temperature showed little influence on vegetation growth in each season in northern Liupanshan and great influence on vegetation growth in spring and summer in the middle part and southern Liupanshan,and it was positive correlation in spring and negative correlation in summer.Very good agreement was found among the influences of evaporation on coverage in Liupanshan region,and the evaporation in spring and summer had negative relativity with vegetation coverage in summer,whereas there was a significant positive correlation between evaporation and vegetation coverage in winter.
基金
Supported by Public Welfare Program of Science and Technology Ministry (2004DIB3J121)
