Satellite - Ocean Colour - MODIS - 1 day - Net Primary Productivity (GSM model and Eppley-VGPM algorithm)

The Aqua satellite platform carries a MODIS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the concentration of chlorophyll-a (Chl-a), most typically due to phytoplankton, present in the water. Modelling is then used to compute an estimate of the Net Primary Productivity (NPP).The model used is based on the standard vertically generalised production model (VGPM). The VGPM is a "chlorophyll-based" model that estimates net primary production from chlorophyll using a temperature-de...Aqua卫星平台搭载了中分辨率成像光谱仪（MODIS），该传感器可在多个波长下获取海洋表层反射的太阳光辐射数据。这些多光谱测量结果被用于反演水体中叶绿素-a（Chl-a）的浓度，而该色素绝大多数由浮游植物产生。随后通过建模计算得到净初级生产力（Net Primary Productivity, NPP）的估算值，所采用的模型基于标准垂直广义生产模型（vertically generalised production model, VGPM）。该垂直广义生产模型属于“基于叶绿素”的模型，通过结合温度相关参数与叶绿素浓度来估算净初级生产力……