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This study aimed to characterize and analyze, based on MOD17 data, the spatio-temporal dynamics of GPP in the northern region of Para state, Brazilian Amazon, during a 6-year period (2001 to 2006). The study area encompasses two river basins (Upper Tapajos and Curua-Una) and covers ∼74,190 km2. The spatial variation of GPP was primarily related to the larger presence of forested areas in Upper Tapajos...
Ocean remote sensing is the only technique capable of quantitatively detecting long-term and global variability of marine primary production. However, because the spectral curves of light derived from satellite sensors have a limited capability to identify the physiological state of phytoplankton, the direct estimation of photoadaptive variables, such as daily maximum carbon fixation in a water column...
Forest ecosystem plays an important role in regulating the global climate by serving as the primary carbon pool for atmospheric carbon dioxide. Deforestation and forest degradation could pose a serious threat on the global emission of greenhouse gases, and this has been declared as the critical issue for United Nation's REDD programme. Under the threat of global warming and climate change, it is critical...
Vegetation is a basic component of urban-suburban landscapes, and turfgrass is a major vegetation type in U.S. cities. QuickBird images were acquired to map the spatial distribution of turfgrass, monitor vegetative conditions, and estimate carbon uptake. Shadows in the images were detected and removed by taking advantage of the high radiometric resolution of the QuickBird data. The results indicated...
Gross primary productivity (GPP) and Net primary productivity (NPP) are key components of the terrestrial carbon cycle. In this paper, an improved light utilization efficiency model was used to estimate GPP and NPP in East China from 2001 to 2008. This model included two sub models: GPP model and respiration model. The data input into the model including remote sensing data: MODIS production such...
Terrestrial carbon cycle plays an important role in global climate change. As a key component of terrestrial carbon cycle, gross primary productivity (GPP) is a major determinant of the exchange of carbon between the atmosphere and terrestrial ecosystems. 8-day global GPP estimated from ground meteorological data and remotely sensed fraction of photosynthetic active radiation (fPAR) by MODIS using...
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