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OALib Journal期刊
ISSN: 2333-9721
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1982-1999年我国陆地植被活动对气候变化响应的季节差异
DOI: 10.11821/xb200301014, PP. 119-125
Keywords: NDVI,季节变化,气候变化,植被活动
Abstract:
利用NOAA-AVHRR数据，以归一化植被指数(NDVI)作为植被活动的指标，研究中国1982~1999年四季植被活动的变化，探讨植被活动对全球变化的主要响应方式。结果表明，18年来，中国植被四季平均NDVI均呈上升趋势。春季是中国植被平均NDVI上升趋势最为显著(P<0.001)、增加速率最快的季节，每年平均增加1.3%；而秋季是NDVI上升趋势最不显著的季节(P=0.075)。不同植被类型的季节平均NDVI的年变化分析表明，生长季的提前是中国植被对全球变化响应的最主要方式，但这种季节响应方式存在明显的区域性差异。夏季平均NDVI增加速率达到最大的地区主要分布在西北干旱区域和青藏高寒区域，而东部季风区域的植被主要表现为春季NDVI增加速率最大。
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