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Start Over Author "Lewis, S. L." Publisher copernicus gmbh
10 results on '"Lewis, S. L."'

3. Mapping tropical forest biomass with radar and spaceborne LiDAR in Lope National Park, Gabon: Overcoming problems of high biomass and persistent cloud

Author

Mitchard, Edward T.A, Saatchi, Sassan S, White, L J T, Abernethy, K A, Jeffery, K J, Lewis, S. L., Collins, Murray, Lefsky, Michael Andrew, Leal, Miguel E., Woodhouse, Iain H, Meir, Patrick, Mitchard, Edward T.A, Saatchi, Sassan S, White, L J T, Abernethy, K A, Jeffery, K J, Lewis, S. L., Collins, Murray, Lefsky, Michael Andrew, Leal, Miguel E., Woodhouse, Iain H, and Meir, Patrick

Abstract

Spatially-explicit maps of aboveground biomass are essential for calculating the losses and gains in forest carbon at a regional to national level. The production of such maps across wide areas will become increasingly necessary as international efforts to protect primary forests, such as the REDD+ (Reducing Emissions from Deforestation and forest Degradation) mechanism, come into effect, alongside their use for management and research more generally. However, mapping biomass over high-biomass tropical forest is challenging as (1) direct regressions with optical and radar data saturate, (2) much of the tropics is persistently cloud-covered, reducing the availability of optical data, (3) many regions include steep topography, making the use of radar data complex, (5) while LiDAR data does not suffer from saturation, expensive aircraft-derived data are necessary for complete coverage. We present a solution to the problems, using a combination of terrain-corrected L-band radar data (ALOS PALSAR), spaceborne LiDAR data (ICESat GLAS) and ground-based data. We map Gabon's Lopé National Park (5000 km2) because it includes a range of vegetation types from savanna to closed-canopy tropical forest, is topographically complex, has no recent contiguous cloud-free high-resolution optical data, and the dense forest is above the saturation point for radar. Our 100 m resolution biomass map is derived from fusing spaceborne LiDAR (7142 ICESat GLAS footprints), 96 ground-based plots (average size 0.8 ha) and an unsupervised classification of terrain-corrected ALOS PALSAR radar data, from which we derive the aboveground biomass stocks of the park to be 78 Tg C (173 Mg C ha-1). This value is consistent with our field data average of 181 Mg C ha-1, from the field plots measured in 2009 covering a total of 78 ha, and which are independent as they were not used for the GLAS-biomass estimation. We estimate an uncertainty of ± 25% on our carbon stock value for the park. This error term incl

Published
2012

4. Mapping tropical forest biomass with radar and spaceborne LiDAR in Lopé National Park, Gabon: overcoming problems of high biomass and persistent cloud

Author

Mitchard, E. T. A., primary, Saatchi, S. S., additional, White, L. J. T., additional, Abernethy, K. A., additional, Jeffery, K. J., additional, Lewis, S. L., additional, Collins, M., additional, Lefsky, M. A., additional, Leal, M. E., additional, Woodhouse, I. H., additional, and Meir, P., additional

Published
2012
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6. Height-diameter allometry of tropical forest trees

Author

Feldpausch, T. R., primary, Banin, L., additional, Phillips, O. L., additional, Baker, T. R., additional, Lewis, S. L., additional, Quesada, C. A., additional, Affum-Baffoe, K., additional, Arets, E. J. M. M., additional, Berry, N. J., additional, Bird, M., additional, Brondizio, E. S., additional, de Camargo, P., additional, Chave, J., additional, Djagbletey, G., additional, Domingues, T. F., additional, Drescher, M., additional, Fearnside, P. M., additional, França, M. B., additional, Fyllas, N. M., additional, Lopez-Gonzalez, G., additional, Hladik, A., additional, Higuchi, N., additional, Hunter, M. O., additional, Iida, Y., additional, Salim, K. A., additional, Kassim, A. R., additional, Keller, M., additional, Kemp, J., additional, King, D. A., additional, Lovett, J. C., additional, Marimon, B. S., additional, Marimon-Junior, B. H., additional, Lenza, E., additional, Marshall, A. R., additional, Metcalfe, D. J., additional, Mitchard, E. T. A., additional, Moran, E. F., additional, Nelson, B. W., additional, Nilus, R., additional, Nogueira, E. M., additional, Palace, M., additional, Patiño, S., additional, Peh, K. S.-H., additional, Raventos, M. T., additional, Reitsma, J. M., additional, Saiz, G., additional, Schrodt, F., additional, Sonké, B., additional, Taedoumg, H. E., additional, Tan, S., additional, White, L., additional, Wöll, H., additional, and Lloyd, J., additional

Published
2011
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7. Supplementary material to "Height-diameter allometry of tropical forest trees"

Author

Feldpausch, T. R., primary, Banin, L., additional, Phillips, O. L., additional, Baker, T. R., additional, Lewis, S. L., additional, Quesada, C. A., additional, Affum-Baffoe, K., additional, Arets, E. J. M. M., additional, Berry, N. J., additional, Bird, M., additional, Brondizio, E. S., additional, de Camargo, P., additional, Chave, J., additional, Djagbletey, G., additional, Domingues, T. F., additional, Drescher, M., additional, Fearnside, P. M., additional, França, M. B., additional, Fyllas, N. M., additional, Lopez-Gonzalez, G., additional, Hladik, A., additional, Higuchi, N., additional, Hunter, M. O., additional, Iida, Y., additional, Abu Silam, K., additional, Kassim, A. R., additional, Keller, M., additional, Kemp, J., additional, King, D. A., additional, Lovett, J. C., additional, Marimon, B. S., additional, Marimon-Junior, B. H., additional, Lenza, E., additional, Marshall, A. R., additional, Metcalfe, D. J., additional, Mitchard, E. T. A., additional, Moran, E. F., additional, Nelson, B. W., additional, Nilus, R., additional, Nogueira, E. M., additional, Palace, M., additional, Patiño, S., additional, Peh, K. S.-H., additional, Raventos, M. T., additional, Reitsma, J. M., additional, Saiz, G., additional, Schrodt, F., additional, Sonké, B., additional, Taedoumg, H. E., additional, Tan, S., additional, White, L., additional, Wöll, H., additional, and Lloyd, J., additional

Published
2010
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8. Height-diameter allometry of tropical forest trees

Author

Feldpausch, T. R., primary, Banin, L., additional, Phillips, O. L., additional, Baker, T. R., additional, Lewis, S. L., additional, Quesada, C. A., additional, Affum-Baffoe, K., additional, Arets, E. J. M. M., additional, Berry, N. J., additional, Bird, M., additional, Brondizio, E. S., additional, de Camargo, P., additional, Chave, J., additional, Djagbletey, G., additional, Domingues, T. F., additional, Drescher, M., additional, Fearnside, P. M., additional, França, M. B., additional, Fyllas, N. M., additional, Lopez-Gonzalez, G., additional, Hladik, A., additional, Higuchi, N., additional, Hunter, M. O., additional, Iida, Y., additional, Abu Silam, K., additional, Kassim, A. R., additional, Keller, M., additional, Kemp, J., additional, King, D. A., additional, Lovett, J. C., additional, Marimon, B. S., additional, Marimon-Junior, B. H., additional, Lenza, E., additional, Marshall, A. R., additional, Metcalfe, D. J., additional, Mitchard, E. T. A., additional, Moran, E. F., additional, Nelson, B. W., additional, Nilus, R., additional, Nogueira, E. M., additional, Palace, M., additional, Patiño, S., additional, Peh, K. S.-H., additional, Raventos, M. T., additional, Reitsma, J. M., additional, Saiz, G., additional, Schrodt, F., additional, Sonké, B., additional, Taedoumg, H. E., additional, Tan, S., additional, White, L., additional, Wöll, H., additional, and Lloyd, J., additional

Published
2010
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9. Do species traits determine patterns of wood production in Amazonian forests?

Author

Baker, T. R., primary, Phillips, O. L., additional, Laurance, W. F., additional, Pitman, N. C. A., additional, Almeida, S., additional, Arroyo, L., additional, DiFiore, A., additional, Erwin, T., additional, Higuchi, N., additional, Killeen, T. J., additional, Laurance, S. G., additional, Nascimento, H., additional, Monteagudo, A., additional, Neill, D. A., additional, Silva, J. N. M., additional, Malhi, Y., additional, López Gonzalez, G., additional, Peacock, J., additional, Quesada, C. A., additional, Lewis, S. L., additional, and Lloyd, J., additional

Published
2009
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10. Do species traits determine patterns of wood production in Amazonian forests?

Author

Baker, T. R., primary, Phillips, O. L., additional, Laurance, W. F., additional, Pitman, N. C. A., additional, Almeida, S., additional, Arroyo, L., additional, DiFiore, A., additional, Erwin, T., additional, Higuchi, N., additional, Killeen, T. J., additional, Laurance, S. G., additional, Nascimento, H., additional, Monteagudo, A., additional, Neill, D. A., additional, Silva, J. N. M., additional, Malhi, Y., additional, López Gonzalez, G., additional, Peacock, J., additional, Quesada, C. A., additional, Lewis, S. L., additional, and Lloyd, J., additional

Published
2008
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