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在高光谱数据模式分解方法(PDM)的基础上,建立了一种新的植被指数(VIPD)。根据地面植被光合成实验,建立了有效光合成曲线植被净初级生产力(NPP)遥感估算模型,利用2001年各月份的MODIS影像数据,估算得到纪伊半岛地区的各类NPP。研究发现,该地区的温带常绿林NPP年均值与2001年IPCC调查报告和地面实测得到的估算值在误差范围内一致。实验证明,该光合成曲线NPP估算模型能够有效地利用高光谱数据,且能较好地应用于温带植被研究。
Based on the hyperspectral data model decomposition method (PDM), a new vegetation index (VIPD) was established. According to the photosynthesis experiment of surface vegetation, the model of net primary productivity (NPP) estimation of effective photosynthetic curve was established. Based on the MODIS image data of each month in 2001, various NPPs of the Kii Peninsula area were estimated. The study found that the average annual NPP of temperate evergreen forests in the region is within the error range of the 2001 IPCC survey and the ground-based measurements. Experiments show that the NPP estimation model of photosynthesis curve can effectively use hyperspectral data and can be applied to study of temperate zone vegetation well.