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4th Week of June 2019

Asner, Gregory P., and Peter M. Vitousek. Remote analysis of biological invasion and biogeochemical change. Proceedings of the National Academy of Sciences 102.12 (2005) 4383-4386
The exotic tree is invading the site. it has higher N concentration than native trees so that the spread of the invader can be easily detected by comparing chemical composition. Interestingly, some region was founded to have higher water content and lower N concentration than before. In that region, the other exotic tree are invading the understory. When remotely sensing, water content could estimated for both overstory and understory trees though N concentration could not.

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AGU 2019

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4th week of june

Asner, G. P., Martin, R. E., Anderson, C. B., & Knapp, D. E. (2015). Quantifying forest canopy traits: Imaging spectroscopy versus field survey.  Remote Sensing of Environment ,  158 , 15-27. They use canopy sunlit reflectance at plot level and the trait samples from sunlit. The plot averaged refletance minimize canopy architectural effect. However actual field samples cover only 5% of a plot, the plot reflectance well explains canopy traits.
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2nd week of december

El Alem, A., Chokmani, K., Agili, H., Poulin, J., Laurion, I., Venkatesan, A. E., & Dedieu, J. P. (2019, December). Potential of a Drone Hyperspectral Data-Based Model to Remote Estimate Chlorophyll-a Concentration from Sentinel 2A and 2B Sensors Data. In  AGU Fall Meeting 2019 . AGU. As for ocean chlorophyll contents, they are not distributed evenly. Rather, their amounts are polarized. The author harmonized two models, the one is classifying model and the other is retrieving model.
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