Search Results - "Quegan, S"

The BIOMASS mission: Mapping global forest biomass to better understand the terrestrial carbon cycle by Le Toan, T., Quegan, S., Davidson, M.W.J., Balzter, H., Paillou, P., Papathanassiou, K., Plummer, S., Rocca, F., Saatchi, S., Shugart, H., Ulander, L.

“…In response to the urgent need for improved mapping of global biomass and the lack of any current space systems capable of addressing this need, the BIOMASS…”
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A machine learning approach to map tropical selective logging by Hethcoat, M.G., Edwards, D.P., Carreiras, J.M.B., Bryant, R.G., França, F.M., Quegan, S.

“…Hundreds of millions of hectares of tropical forest have been selectively logged, either legally or illegally. Methods for detecting and monitoring tropical…”
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Mapping pervasive selective logging in the south-west Brazilian Amazon 2000-2019 by Hethcoat, M G, Carreiras, J M B, Edwards, DP, Bryant, R G, Peres, C A, Quegan, S

“…Tropical forests harbour the highest biodiversity on the planet and are essential to human livelihoods and the global economy. However continued loss and…”
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Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system by Ciais, P, Dolman, A. J, Bombelli, A, Duren, R, Peregon, A, Rayner, P. J, Miller, C, Gobron, N, Kinderman, G, Marland, G, Gruber, N, Chevallier, F, Andres, R. J, Balsamo, G, Bopp, L, Bréon, F.-M, Broquet, G, Dargaville, R, Battin, T. J, Borges, A, Bovensmann, H, Buchwitz, M, Butler, J, Canadell, J. G, Cook, R. B, DeFries, R, Engelen, R, Gurney, K. R, Heinze, C, Heimann, M, Held, A, Henry, M, Law, B, Luyssaert, S, Miller, J, Moriyama, T, Moulin, C, Myneni, R. B, Nussli, C, Obersteiner, M, Ojima, D, Pan, Y, Paris, J.-D, Piao, S. L, Poulter, B, Plummer, S, Quegan, S, Raymond, P, Reichstein, M, Rivier, L, Sabine, C, Schimel, D, Tarasova, O, Valentini, R, Wang, R, van der Werf, G, Wickland, D, Williams, M, Zehner, C

“…A globally integrated carbon observation and analysis system is needed to improve the fundamental understanding of the global carbon cycle, to improve our…”
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Model-data synthesis in terrestrial carbon observation: methods, data requirements and data uncertainty specifications by Raupach, M.R, Rayner, P.J, Barrett, D.J, Defries, R.S, Heimann, M, Ojima, D.S, Quegan, S, Schmullius, C.C

“…Systematic, operational, long‐term observations of the terrestrial carbon cycle (including its interactions with water, energy and nutrient cycles and…”
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Impact of land cover uncertainties on estimates of biospheric carbon fluxes by Quaife, T, Quegan, S, Disney, M, Lewis, P, Lomas, M, Woodward, F.I

“…Large‐scale bottom‐up estimates of terrestrial carbon fluxes, whether based on models or inventory, are highly dependent on the assumed land cover. Most…”
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High-resolution measurements of scattering in wheat canopies-implications for crop parameter retrieval by Brown, S.C.M., Quegan, S., Morrison, K., Bennett, J.C., Cookmartin, G.

“…Polarimetric X- and C-band measurements by the University of Sheffield ground-based synthetic aperture radar (GB-SAR) indoor system provide three-dimensional…”
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Filtering of multichannel SAR images by Quegan, S., Jiong Jiong Yu

“…An explicit form of the linear multichannel synthetic aperture radar (SAR) intensity filter, which preserves radiometry while optimally reducing speckle is…”
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Improving the representation of fire disturbance in dynamic vegetation models by assimilating satellite data: a case study over the Arctic by Kantzas, E. P, Quegan, S, Lomas, M

“…Fire provides an impulsive and stochastic pathway for carbon from the terrestrial biosphere to enter the atmosphere. Despite fire emissions being of similar…”
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Evaluation of the snow regime in dynamic vegetation land surface models using field measurements by Kantzas, E, Quegan, S, Lomas, M, Zakharova, E

“…An increasing number of studies have demonstrated significant climatic and ecological changes occurring in the northern latitudes over the past decades. As…”
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A unified algorithm for phase and cross-talk calibration of polarimetric data-theory and observations by Quegan, S.

“…A unified approach to phase and cross-talk calibration of polarimetric data which can be applied to calibrating scattering matrix data or to extraction of the…”
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Faraday rotation effects on L-band spaceborne SAR data by Wright, P.A., Quegan, S., Wheadon, N.S., Hall, C.D.

“…Several proposed near-future spaceborne radar missions, such as the Advanced Land Observing Satellite (ALOS) and TerraSAR, will include an L-band instrument…”
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Bud-burst modelling in Siberia and its impact on quantifying the carbon budget by Picard, G, Quegan, S, Delbart, N, Lomas, M.R, Le Toan, T, Woodward, F.I

“…Vegetation phenology is affected by climate change and in turn feeds back on climate by affecting the annual carbon uptake by vegetation. To quantify the…”
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Multitemporal ERS SAR analysis applied to forest mapping by Quegan, S., Le Toan, T., Yu, J.J., Ribbes, F., Floury, N.

“…Examination of the physical background underlying the ERS response of forest and analysis of time series of ERS data indicates that the greater temporal…”
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Satellite-based radar mapping of British forest age and Net Ecosystem Exchange using ERS tandem coherence by Drezet, P.M.L., Quegan, S.

“…A method of mapping forest age structure using satellite remote sensing data in combination with ground data is used to form an age structure map of mainland…”
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Radar remote sensing for the delineation of forest cover maps and the detection of deforestation by Thiel, C, Drezet, P, Weise, C, Quegan, S, Schmullius, C

“…This paper assesses the feasibility of forest cover mapping and the delineation of deforestation using Japanese Earth Resource Satellite (JERS)-1 Synthetic…”
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Indoor C-band polarimetric interferometry observations of a mature wheat canopy by Gomez-Dans, J.L., Quegan, S., Bennett, J.C.

“…We present results from experiments carried out in the ground-based synthetic aperture radar (GB-SAR) facility at the University of Sheffield to ascertain the…”
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Modeling microwave interactions with crops and comparison with ERS-2 SAR observations by Cookmartin, G., Saich, P., Quegan, S., Cordey, R., Burgess-Allen, P., Sowter, A.

“…A comprehensive multilayer second-order radiative transfer model, driven entirely by intensive field observations, is used to show that second order terms…”
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Environmental effects on the interferometric repeat-pass coherence of forests by Drezet, P.M.L., Quegan, S.

“…The variability of C-band one-day tandem coherence measurements of forest is analyzed both statistically and with the aid of a soil-vegetation-atmosphere…”
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Quantitative comparison of the performance of SAR segmentation algorithms by Caves, R., Quegan, S., White, R.

“…Methods to evaluate the performance of segmentation algorithms for synthetic aperture radar (SAR) images are developed, based on known properties of coherent…”
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