Evaluating water stress controls on primary production in biogeochemical and remote sensing based models

Steven Running, Tian Hanqin, Liu Mingliang, Faith Heinsch, Zhao Maosheng & Qiaozhen Mu
Water stress is one of the most important limiting factors controlling terrestrial primary production, and the performance of a primary production model is largely determined by its capacity to capture environmental water stress. The algorithm that generates the global near-real-time MODIS GPP/NPP products (MOD17) uses VPD ( vapor pressure deficit) alone to estimate the environmental water stress. This paper compares the water stress calculation in the MOD17 algorithm with results simulated using a process-based biogeochemical...
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