The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Wolfgang Ludwig - One of the best experts on this subject based on the ideXlab platform.
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estimation of global River Transport of sediments and associated particulate c n and p
Global Biogeochemical Cycles, 2005Co-Authors: Arthur H W Beusen, Wolfgang Ludwig, Arnold L M Dekkers, A F Bouwman, John A HarrisonAbstract:[1] This paper presents a multiple linear regression model developed for describing global River export of sediments (suspended solids, TSS) to coastal seas, and approaches for estimating organic carbon, nitrogen, and phosphorous Transported as particulate matter (POC, PN, and PP) associated with sediments. The model, with River-basin spatial scale and a 1-year temporal scale, is based on five factors with a significant influence on TSS yields (the extent of marginal grassland and wetland rice, Fournier precipitation, Fournier slope, and lithology), and accounts for sediment trapping in reservoirs. The model generates predictions within a factor of 4 for 80% of the 124 Rivers in the data set. It is a robust model which was cross-validated by using training and validation sets of data, and validated against independent data. In addition, Monte Carlo simulations were used to deal with uncertainties in the model coefficients for the five model factors. The global River export of TSS calculated thus is 19 Pg yr �1 with a 95% confidence interval of 11–27 Pg yr �1 when accounting for sediment trapping in regulated Rivers. Associated POC, PN, and PP export is 197 Tg yr � 1 (as C), 30 Tg yr �1 (N), and 9 Tg yr �1 (P), respectively. The global sediment trapping included in these estimates is 13%. Most particulate nutrients are Transported by Rivers to the Pacific (� 37% of global particulate nutrient export), Atlantic (28–29%), and Indian (� 20%) oceans, and the major source regions are Asia (� 50% of global particulate nutrient export), South America (� 20%), and Africa (12%).
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worldwide distribution of continental rock lithology implications for the atmospheric soil co2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
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Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
Philippe Amiotte Suchet - One of the best experts on this subject based on the ideXlab platform.
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worldwide distribution of continental rock lithology implications for the atmospheric soil co2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
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Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
Jeanluc Probst - One of the best experts on this subject based on the ideXlab platform.
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worldwide distribution of continental rock lithology implications for the atmospheric soil co2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
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Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity River Transport to the oceans
Global Biogeochemical Cycles, 2003Co-Authors: Philippe Amiotte Suchet, Jeanluc Probst, Wolfgang LudwigAbstract:[1] The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic timescale and is mainly controlled by the chemical properties of rocks. This leads us to develop the first world lithological map with a grid resolution of 1° × 1°. This paper analyzes the spatial distribution of the six main rock types by latitude, continents, and ocean drainage basins and for 49 large River basins. Coupling our digital map with the GEM-CO2 model, we have also calculated the amount of atmospheric/soil CO2 consumed by rock weathering and alkalinity River Transport to the ocean. Among all silicate rocks, shales and basalts appear to have a significant influence on the amount of CO2 uptake by chemical weathering.
Matthieu Lecuyer - One of the best experts on this subject based on the ideXlab platform.
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Slow food/Slow freight. Le Transport urbain par voie d?eau, vitrine ou fenêtre de tir pour les circuits courts alimentaires ?
2013Co-Authors: Antoine Beyer, Matthieu LecuyerAbstract:The recent development of containerized River Transport in French urban logistics (i.e. the Franprix experience in Paris in 2012) shed light on a still marginal offer which combines short-hauls for food supply chains with River Transport. Only very rare cases could be identified in France that are thoroughly analyzed. Their promoters clearly prioritize environmental and social benefits instead of financial profitability, so that the various models are still experimental and economically uncertain. They strongly rely on a social and solidarity economy. In a broader perspective, emerging services reveal the richness and versatility of urban waterways and their capacity to be used within new logistical schemes. They also can be regarded as an interesting attempt to question the urban and social coherence of the sustainable city.
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Slow food/Slow freight. Le Transport urbain par voie d’eau, vitrine ou fenêtre de tir pour les circuits courts alimentaires ?
Research Papers in Economics, 2013Co-Authors: Antoine Beyer, Matthieu LecuyerAbstract:The recent development of containerized River Transport in French urban logistics (i.e. the Franprix experience in Paris in 2012) shed light on a still marginal offer which combines short-hauls for food supply chains with River Transport. Only very rare cases could be identified in France that are thoroughly analyzed. Their promoters clearly prioritize environmental and social benefits instead of financial profitability, so that the various models are still experimental and economically uncertain. They strongly rely on a social and solidarity economy. In a broader perspective, emerging services reveal the richness and versatility of urban waterways and their capacity to be used within new logistical schemes. They also can be regarded as an interesting attempt to question the urban and social coherence of the sustainable city.
Antoine Beyer - One of the best experts on this subject based on the ideXlab platform.
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Slow food/Slow freight. Le Transport urbain par voie d?eau, vitrine ou fenêtre de tir pour les circuits courts alimentaires ?
2013Co-Authors: Antoine Beyer, Matthieu LecuyerAbstract:The recent development of containerized River Transport in French urban logistics (i.e. the Franprix experience in Paris in 2012) shed light on a still marginal offer which combines short-hauls for food supply chains with River Transport. Only very rare cases could be identified in France that are thoroughly analyzed. Their promoters clearly prioritize environmental and social benefits instead of financial profitability, so that the various models are still experimental and economically uncertain. They strongly rely on a social and solidarity economy. In a broader perspective, emerging services reveal the richness and versatility of urban waterways and their capacity to be used within new logistical schemes. They also can be regarded as an interesting attempt to question the urban and social coherence of the sustainable city.
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Slow food/Slow freight. Le Transport urbain par voie d’eau, vitrine ou fenêtre de tir pour les circuits courts alimentaires ?
Research Papers in Economics, 2013Co-Authors: Antoine Beyer, Matthieu LecuyerAbstract:The recent development of containerized River Transport in French urban logistics (i.e. the Franprix experience in Paris in 2012) shed light on a still marginal offer which combines short-hauls for food supply chains with River Transport. Only very rare cases could be identified in France that are thoroughly analyzed. Their promoters clearly prioritize environmental and social benefits instead of financial profitability, so that the various models are still experimental and economically uncertain. They strongly rely on a social and solidarity economy. In a broader perspective, emerging services reveal the richness and versatility of urban waterways and their capacity to be used within new logistical schemes. They also can be regarded as an interesting attempt to question the urban and social coherence of the sustainable city.
