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-  2011 

基于森林详查与遥感数据降尺度技术估算中国林龄的空间分布

DOI: 10.11821/yj2011010017

Keywords: 林龄,森林详查,降尺度,NDVI,碳汇

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Abstract:

摘要: 森林的林龄结构及空间分布是评估区域尺度森林生态系统碳汇潜力的重要参数。以第五次全国森林详查获取的省级优势树种的平均林龄及分布面积为基础,以同期生长季节的NOAA/AVHRR NDVI遥感数据为辅助,在空间降尺度统计技术的支持下,得出了全国8 km分辨率下的森林林龄的定量分布。结果表明:中国林龄在空间分布具有很大异质性。东南地区的林龄较低,省平均林龄主要介于20~30年。林龄大于120年的森林主要分布在四川中部及新疆西北部地区。西藏东南部、黑龙江西北部、内蒙古东北部以及云南南部地区的林龄介于两者之间,其值大多介于70~120年。从全国范围看,森林的林龄主要介于10~80年,其面积占森林总面积的85.4%,其中林龄在20~40年之间的森林面积占35.3%。全国总的平均林龄为40.6年,标准差为26.6年,在概率分布上呈现单峰非正态分布

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