The Experts below are selected from a list of 51258 Experts worldwide ranked by ideXlab platform
Bhavik R. Bakshi - One of the best experts on this subject based on the ideXlab platform.
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accounting for emissions and sinks from the biogeochemical cycle of Carbon in the u s economic input output model
Journal of Industrial Ecology, 2014Co-Authors: Shweta Singh, Bhavik R. BakshiAbstract:type="main"> Biogeochemical cycles are essential ecosystem services that continue to degrade as a result of human activities, but are not fully considered in efforts toward sustainable engineering. This article develops a model that integrates the Carbon cycle with economic activities in the 2002 U.S. economy. Data about the Carbon cycle, including emissions and sequestration flows, is obtained from the greenhouse gas inventory of the U.S. Environmental Protection Agency. Economic activities are captured by the economic input-output model available from the Bureau of Economic Analysis. The resulting model is more comprehensive in its accounting for the Carbon cycle than existing methods for Carbon footprint (CF) calculations. Examples of unique flows in this model include the effect of land-use and land-cover change on Carbon dioxide flow within the U.S. national boundary, Carbon sequestration in urban trees, and emissions resulting from liming. This model is used to gain unique insight into the Carbon Profile of U.S. economic sectors by providing the life cycle emissions and sequestration in each sector. Such insight may be used to support policies, manage supply chains, and be used for more comprehensive CF calculations.
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accounting for emissions and sinks from the biogeochemical cycle of Carbon in the u s economic input output model
Journal of Industrial Ecology, 2014Co-Authors: Shweta Singh, Bhavik R. BakshiAbstract:Biogeochemical cycles are essential ecosystem services that continue to degrade as a result of human activities, but are not fully considered in efforts toward sustainable engineering. This article develops a model that integrates the Carbon cycle with economic activities in the 2002 U.S. economy. Data about the Carbon cycle, including emissions and sequestration flows, is obtained from the greenhouse gas inventory of the U.S. Environmental Protection Agency. Economic activities are captured by the economic input-output model available from the Bureau of Economic Analysis. The resulting model is more comprehensive in its accounting for the Carbon cycle than existing methods for Carbon footprint (CF) calculations. Examples of unique flows in this model include the effect of land-use and land-cover change on Carbon dioxide flow within the U.S. national boundary, Carbon sequestration in urban trees, and emissions resulting from liming. This model is used to gain unique insight into the Carbon Profile of U.S. economic sectors by providing the life cycle emissions and sequestration in each sector. Such insight may be used to support policies, manage supply chains, and be used for more comprehensive CF calculations.
Shweta Singh - One of the best experts on this subject based on the ideXlab platform.
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accounting for emissions and sinks from the biogeochemical cycle of Carbon in the u s economic input output model
Journal of Industrial Ecology, 2014Co-Authors: Shweta Singh, Bhavik R. BakshiAbstract:type="main"> Biogeochemical cycles are essential ecosystem services that continue to degrade as a result of human activities, but are not fully considered in efforts toward sustainable engineering. This article develops a model that integrates the Carbon cycle with economic activities in the 2002 U.S. economy. Data about the Carbon cycle, including emissions and sequestration flows, is obtained from the greenhouse gas inventory of the U.S. Environmental Protection Agency. Economic activities are captured by the economic input-output model available from the Bureau of Economic Analysis. The resulting model is more comprehensive in its accounting for the Carbon cycle than existing methods for Carbon footprint (CF) calculations. Examples of unique flows in this model include the effect of land-use and land-cover change on Carbon dioxide flow within the U.S. national boundary, Carbon sequestration in urban trees, and emissions resulting from liming. This model is used to gain unique insight into the Carbon Profile of U.S. economic sectors by providing the life cycle emissions and sequestration in each sector. Such insight may be used to support policies, manage supply chains, and be used for more comprehensive CF calculations.
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accounting for emissions and sinks from the biogeochemical cycle of Carbon in the u s economic input output model
Journal of Industrial Ecology, 2014Co-Authors: Shweta Singh, Bhavik R. BakshiAbstract:Biogeochemical cycles are essential ecosystem services that continue to degrade as a result of human activities, but are not fully considered in efforts toward sustainable engineering. This article develops a model that integrates the Carbon cycle with economic activities in the 2002 U.S. economy. Data about the Carbon cycle, including emissions and sequestration flows, is obtained from the greenhouse gas inventory of the U.S. Environmental Protection Agency. Economic activities are captured by the economic input-output model available from the Bureau of Economic Analysis. The resulting model is more comprehensive in its accounting for the Carbon cycle than existing methods for Carbon footprint (CF) calculations. Examples of unique flows in this model include the effect of land-use and land-cover change on Carbon dioxide flow within the U.S. national boundary, Carbon sequestration in urban trees, and emissions resulting from liming. This model is used to gain unique insight into the Carbon Profile of U.S. economic sectors by providing the life cycle emissions and sequestration in each sector. Such insight may be used to support policies, manage supply chains, and be used for more comprehensive CF calculations.
Annekatrin Prescher - One of the best experts on this subject based on the ideXlab platform.
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microbial activity and root Carbon inputs are more important than soil Carbon diffusion in simulating soil Carbon Profiles
Journal of Geophysical Research, 2021Co-Authors: Yingping Wang, Haicheng Zhang, Philippe Ciais, Daniel S Goll, Yuanyuan Huang, Jeffrey D Wood, Scott V Ollinger, Xuli Tang, Annekatrin PrescherAbstract:It is well-known that soil Carbon composition and turnover rate vary with soil depth, and the responses of soil Carbon to global change in deeper soil layers may differ from those near the surface. Therefore, vertically resolved soil Carbon models are needed for accurately predicting future soil Carbon under global warming. In this study, we developed a vertically resolved soil Carbon model by including vertical transport of soil Carbon and using Michaelis-Menten kinetics for soil Carbon decomposition by microbes. The model was calibrated against six sites with the observed Profiles of both soil Carbon concentration and 14C measurements, and against 91 forest sites with soil Carbon concentrations across a wide range of climate and soil conditions for four forest types in Europe and China. Results of independent model validation at another 93 sites showed that the calibrated model explained 40%–94% of the observed variance of soil Carbon concentrations at different depths. Model sensitivity analysis showed that microbial activity and root Carbon inputs are more important than soil Carbon diffusion in simulating soil Carbon Profile. Results from our study highlight the need for detailed measurements of soil microbial activities and root Carbon input at different soil depths in the field.
Daniel S Goll - One of the best experts on this subject based on the ideXlab platform.
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microbial activity and root Carbon inputs are more important than soil Carbon diffusion in simulating soil Carbon Profiles
Journal of Geophysical Research, 2021Co-Authors: Yingping Wang, Haicheng Zhang, Philippe Ciais, Daniel S Goll, Yuanyuan Huang, Jeffrey D Wood, Scott V Ollinger, Xuli Tang, Annekatrin PrescherAbstract:It is well-known that soil Carbon composition and turnover rate vary with soil depth, and the responses of soil Carbon to global change in deeper soil layers may differ from those near the surface. Therefore, vertically resolved soil Carbon models are needed for accurately predicting future soil Carbon under global warming. In this study, we developed a vertically resolved soil Carbon model by including vertical transport of soil Carbon and using Michaelis-Menten kinetics for soil Carbon decomposition by microbes. The model was calibrated against six sites with the observed Profiles of both soil Carbon concentration and 14C measurements, and against 91 forest sites with soil Carbon concentrations across a wide range of climate and soil conditions for four forest types in Europe and China. Results of independent model validation at another 93 sites showed that the calibrated model explained 40%–94% of the observed variance of soil Carbon concentrations at different depths. Model sensitivity analysis showed that microbial activity and root Carbon inputs are more important than soil Carbon diffusion in simulating soil Carbon Profile. Results from our study highlight the need for detailed measurements of soil microbial activities and root Carbon input at different soil depths in the field.
Yiming Rong - One of the best experts on this subject based on the ideXlab platform.
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experimental study on vacuum carburizing process for low Carbon alloy steel
Journal of Materials Engineering and Performance, 2014Co-Authors: Shaopeng Wei, Gang Wang, Xianhui Zhao, Xiaopeng Zhang, Yiming RongAbstract:As a low-Carbon alloy steel, 20Cr2Ni4A steel has an excellent mechanical properties. It has been used for producing heavy-duty gears, which require good wear and fatigue resistance. The vacuum carburizing process can improve the quality of gears and extend the service life. In this article, a complete heat-treatment process for 20Cr2Ni4A, with carburizing, tempering, quenching and cryogenic steps involved, was proposed. A numerical method was employed to design the carburizing step. The carburized samples were characterized by analysis of Carbon Profile, surface-retained austenite content, microstructure, and hardness Profile. A good microstructure was obtained with acicular-tempered martensite, less-retained austenite, fine granular-dispersed carbides, and was oxide free. The final surface hardness was 64.2HRC, and the case depth was 0.86 mm, which meet the requirements of products. The relationships among process, performance, and microstructure were investigated to understand the inner connection.