3rd week of december

Gitelson, A.A., Zur, Y., Chivkunova, O.B. and Merzlyak, M.N., 2002. Assessing carotenoid content in plant leaves with reflectance spectroscopy. Photochem Photobiol, 75(3): 272-81.

Carotenoid content is lower than leaf chlorophyll content. But the seasonal decrease is much lower than that of chlorophyll. Namely, in green leaves, the strong chlorophyll effect in visible range obscures carotenoid signal. On the other hand, in yellowish leaves, the effect is little. Before estimating carotenoid content, it can be useful to classify leaves by carotenoid proportion.

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3rd week of october

Wang, Z., et al. (2010). "Large variations in Southern Hemisphere biomass burning during the last 650 years." Science 330(6011): 1663-1666. Biomass burning and methane oxidation affect the amount of CO. C derived from biomass burning has higher delta C-13 than methane oxidized C. Also, there is fraction between O-16 and O-18. Using delta C-13 and delta O-18, CO amounts and their relative source can be retrieved.

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1st week of August

The Global Ecosystem Dynamics Investigation: High-resolution laser ranging of the Earth’s forests and topography The paper mapped above ground biomass using satellite radar and LiDAR fusion. Satellite radar systems provides global data, as it passes through clouds. However, radar cannot produce vertical profile. Satellite LiDAR system, the paper targeting, provides accurate canopy point clouds. On the contrary, clouds occlude LiDAR incident wave. As the author mentioned, it only covered only 4% of the surface for 2 years. To combine LiDAR with radar, LiDAR data was compared to radar and then extended to radar. Validation was done plots where the coverage of LiDAR and radar overlapped. Reference Dubayah, R., Blair, J. B., Goetz, S., Fatoyinbo, L., Hansen, M., Healey, S., ... & Armston, J. (2020). The Global Ecosystem Dynamics Investigation: High-resolution laser ranging of the Earth’s forests and topography. Science of Remote Sensing, 1, 100002.

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AGU 2019

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