摘要
对植被状况和植被覆盖的研究可以反映植被受环境条件影响产生的时空变化。文章根据GIMMS-NDVI数据集1982—2006年影像数据,分析内蒙古农田、森林、草原三种植被类型NDVI年内、年际的变化趋势以及植被覆盖变化特征的空间差异。各植被类型变化曲线都呈现4—7月NDVI激增,8—10月NDVI猛降,冬季农田、草原植被覆盖接近裸土的特点。农田夏季NDVI平均值的历年线性变化趋势通过显著性检验,森林夏季NDVI平均值呈现下降的趋势,草原夏季NDVI平均值呈现上升的趋势,但都不显著。
The study of vegetation conditions and vegetation cover can reflect the spatial and temporal variations of vegetation influenced by environmental conditions. According to the GIMMS NDVI dataset from 1982 to 2006 years, the annual and inter-annual variation tendency of NDVI, and the spatial difference of vegetation cover change features of farmland, forest, grasslands were analyzed. Curves of various vegetation types have shown rapid growth of NDVI from April to July, falling fast from August to October and winter of farmland and grassland veg- etation coverage degree close to bare soil. The linear variation in farmland in summer trend is obvious. Summer shows the tendency of decline in forest, grassland showed a trend of rise in summer, but all of them are not significant.
出处
《内蒙古气象》
2013年第2期23-27,共5页
Meteorology Journal of Inner Mongolia
基金
内蒙古青年基金项目(nmqnqx201315)资助
