| 中国东北地区2007-2010年植被覆盖度及其变化 |
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| 引用本文： | 胡屾,刘骏,毛学刚.中国东北地区2007-2010年植被覆盖度及其变化[J].东北林业大学学报,2017,45(7). |
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| 作者姓名： | 胡屾 刘骏 毛学刚 |
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| 作者单位： | 1. 国家林业局华东林业调查规划设计院,杭州,321001;2. 东北林业大学 |
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| 摘 要： | 为研究中国东北地区植被覆盖变化特征,基于MODIS归一化植被指数(INDV)月合成数据,利用双组分线性混合模型估算中国东北地区2007-2010年植被覆盖度(fc),并对4年间植被覆盖度时空变化规律进行分析.结果表明:(1)中国东北地区植被覆盖度整体处于较高水平,植被覆盖度平均在70%以上,并呈现出东高西低的分布特征;(2)2007-2011年,中国东北地区年最大植被覆盖度总体较稳定并有一定增长趋势,以稳定和轻微恢复为主.稳定及轻微恢复的面积占总面积的90%以上,出现了不同程度退化的面积在10%以下,主要出现在内蒙古自治区东北部以及中部,其原因与该地过度放牧等有关;(3)中国东北地区2007-2010的植被覆盖度变化波动不大,相对稳定;(4)中国东北地区2007-2010年间植被覆盖状况呈良性发展趋势.
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| 关 键 词： | 归一化植被指数 东北地区 植被覆盖度 MODIS |
Extraction and Change of Vegetation Coverage of 2007-2010 in Northeast China |
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| Hu Shen,Liu Jun,Mao Xuegang.Extraction and Change of Vegetation Coverage of 2007-2010 in Northeast China[J].Journal of Northeast Forestry University,2017,45(7). |
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| Authors: | Hu Shen Liu Jun Mao Xuegang |
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| Abstract: | Combining the normalized difference vegetation index (NDVI) derived from MODIS data with two component linear mixed model (FVC), vegetation fraction during from 2007 to 2010 in Northeast China and its spatio-temporal variation rules were estimated and analyzed for vegetation coverage changes in Northeast China.The results show that: (1)FVC in Northeast China was at a high level with the average of above 70%, presented a distribution characteristic of lower in west and higher in east.(2)In 2007-2011, annual maximum FVC was relatively stable and had a certain growth trend to stabilize and slightly recover.More than 90% area of the total was stable and slight recovery, and less than 10% area had different degree of degradation due to the phenomenon of excessive grazing, mainly in the northeast and central of the Inner Mongolia Autonomous Region.(3)FVC in 2007-2011 in Northeast China was relatively stable, with little changes.(4)The vegetation coverage in Northeast China in 2007-2011 was with a positive trend. |
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| Keywords: | NDVI Northeastern China Fractional vegetation cover MODIS |
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