Articles | Volume 13, issue 7
https://doi.org/10.5194/bg-13-2195-2016
https://doi.org/10.5194/bg-13-2195-2016
Research article
 | 
15 Apr 2016
Research article |  | 15 Apr 2016

Amazon forest structure generates diurnal and seasonal variability in light utilization

Douglas C. Morton, Jérémy Rubio, Bruce D. Cook, Jean-Philippe Gastellu-Etchegorry, Marcos Longo, Hyeungu Choi, Maria Hunter, and Michael Keller

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Cited articles

Alton, P. B., Ellis, R., Los, S. O., and North, P. R.: Improved global simulations of gross primary product based on a separate and explicit treatment of diffuse and direct sunlight, J. Geophys. Res.-Atmos., 112, D07203, https://doi.org/10.1029/2006JD008022, 2007a.
Alton, P. B., North, P. R., and Los, S. O.: The impact of diffuse sunlight on canopy light-use efficiency, gross photosynthetic product and net ecosystem exchange in three forest biomes, Glob. Change Biol., 13, 776–787, https://doi.org/10.1111/j.1365-2486.2007.01316.x, 2007b.
Asner, G. P., Nepstad, D., Cardinot, G., and Ray, D.: Drought stress and carbon uptake in an amazon forest measured with spaceborne imaging spectroscopy, P. Natl. Acad. Sci. USA, 101, 6039–6044, 2004.
Asner, G. P., Kellner, J. R., Kennedy-Bowdoin, T., Knapp, D. E., Anderson, C., and Martin, R. E.: Forest canopy gap distributions in the southern peruvian amazon, PLoS ONE, 8, e60875, https://doi.org/10.1371/journal.pone.0060875, 2013.
Baccini, A., Goetz, S. J., Walker, W. S., Laporte, N. T., Sun, M., Sulla-Menashe, D., Hackler, J., Beck, P. S. A., Dubayah, R., Friedl, M. A., Samanta, S., and Houghton, R. A.: Estimated carbon dioxide emissions from tropical deforestation improved by carbon-density maps, Nature Climate Change, 2, 182–185, 2012.
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Short summary
Seasonal dynamics of tropical forest productivity remain an important source of uncertainty in assessments of the land carbon sink. This study confirms the potential for canopy structure and illumination geometry to alter the seasonal availability of light for canopy photosynthesis without changes in canopy composition. Our results point to the need for 3-D forest structure in ecosystem models to account the impact of changing illumination geometry on tropical forest productivity.
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