生态环境学报2016，Vol.25Issue(5)：737-743,7.DOI:10.16258/j.cnki.1674-5906.2016.05.002
基于像元二分法和强度分析方法的内蒙古植被覆盖度时空变化规律分析
Spatiotemporal Changes of Vegetation Coverage in Inner Mongolia Based on the Dimidiate Pixel Model and Intensity Analysis
摘要
Abstract
In this paper, based on the GIMMS NDVI3g data, using dimidiate pixel model and intensity analysis methods to analyze the changes of vegetation coverage in Inner Mongolia from 1982 to 2010 at three levels as time interval, category and transition. The results show that the vegetation coverage estimated by dimidiate pixel model has a high correlation with the measured values, which up to 0.836. The vegetation coverage’s increased area (49.2%) is greater than the reduced area (43.3%) from 1980s to 1990s, while in 1990s to the 21st century the reduced area (57.1%) is greater than the increased area (35.6%), indicating that the vegetation growth in the 1990s is better than the two other decades. From the intensity analysis we can see that the average annual rate of change in the 1990s-early 21st century was relatively faster than that of the 1980s-1990s. In the 1980s-1990s, the gain of high vegetation coverage was active and the loss was dormant; the gain and loss of low vegetation coverage was both dormant. In the 1990s-early 21st century the gain of high and low vegetation coverage both are dormant, while the losses were active. In two study periods, the low coverage of vegetation transition to a higher level, however the high vegetation coverage is converting to the lower coverage.关键词
植被覆盖度/像元二分模型/强度分析/时空变化Key words
vegetation coverage/dimidiate pixel model/intensity analysis/spatiotemporal changes分类
资源环境引用本文复制引用
佟斯琴,包玉海,张巧凤,都瓦拉..基于像元二分法和强度分析方法的内蒙古植被覆盖度时空变化规律分析[J].生态环境学报,2016,25(5):737-743,7.基金项目
国家科技支撑计划子课题（2013BAK05B01）；国家自然基金项目 （）
