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Carbon Cycle - Astrophysics Data System

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Last Updated: 03 October 2022

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The Global Carbon Cycle

One of the world's top climate scientists, Dennis Bruton, is a must-have introduction to this essential geochemical generator of the Earth's climate system. Archer explains how on hundreds-thousand-year glacial/interglacial time scales, the carbon cycle in the ocean amplifies climate change, and how, on the human time scale of decades, the carbon cycle has been slowing climate change by absorbing fossil-fuel carbon dioxide into the oceans and land biosphere. The Global Carbon Cycle includes a glossary of terms, plans for further reading, and equations, as well as a forward-looking discussion of open questions about the global carbon cycle. The carbon cycle is a key feature of the book, as shown by a glossary of terms, predictions for further reading, and graphs.

Source link: https://ui.adsabs.harvard.edu/abs/2011gcc..book.....A/abstract


Global and regional controls on carbon-sulfur isotope cycling during SPICE event in south China

During the SPICE conference in south China, the u03b4 13 C PDB, total carbon, total organic carbon, and total sulfate of Cambrian carbonate of Waergang section of Hunan Province's 06b4 18 O PDB were evaluated, along with global and regional controls on carbon cycling, which culminated in global and regional regulations on carbon cycling.

Source link: https://ui.adsabs.harvard.edu/abs/2022FrES..tmp...64T/abstract


Emergent Climate Change Impacts on the Soil C and N Cycles in the Mojave Desert

In the last 50 years, the Mojave Desert has warmed >2 billion bb0C, and aridified, making it a strategic location to investigate climate change impacts on arid soil processes. We resampled a climosequence of soils in the Mojave first sampled in 1973 and compared current soil conditions to those 45+ years ago. Significant decreases in soil C/N ratios and rises in u03b4 15 N values occurred, indicating more widespread rates of soil C/N cycling and their losses.

Source link: https://ui.adsabs.harvard.edu/abs/2022GBioC..3607254M/abstract


Near-Surface Hydrology and Soil Properties Drive Heterogeneity in Permafrost Distribution, Vegetation Dynamics, and Carbon Cycling in a Sub-Arctic Watershed

Strong spatial heterogeneity exists at scales too small to be attributed to weather forcing or Earth System Models in discontinuous permafrost environments. Ecosystem dynamics in a watershed on the Seward Peninsula, Alaska, here we examine the effects of observed spatial heterogeneity in soil and vegetation, hydrology, and thermal dynamics. We find that landscape heterogeneity has a major influence on soil temperatures and plant composition. Only in talik soils with high nitrogen content is simulated, according to a high shrub yield. Simulations with near-surface taliks have elevated microbial respiration and increased net primary productivity in comparison to those with near-surface permafrost, as well as runs with near-surface permafrost, and simulations with high shrub productivity have outweighed net carbon uptake. We investigated the risk involved with ignoring observed landscape heterogeneity, and found that watershed net carbon uptake is 60% higher when heterogeneity is factored in.

Source link: https://ui.adsabs.harvard.edu/abs/2022JGRG..12706864S/abstract


A Process-Model Perspective on Recent Changes in the Carbon Cycle of North America

Multiple research using a variety of estimation methods have discovered a carbon sink over the past two decades in Continental North America. North America has a C sink, ranked 1. 37 - 0. 38 PgC year -1 in Canada, 0. 16 u00b1 0. 05 PgC year -1 in Mexico, 0. 01 0. 0 0. 05 in Central America and the Caribbean ; this year -1 in Canada; slumped to 0. 37 - 0. 38 - 0. 18 - 0. 18 PgC year -1 in Canada; 0. 18 00b1 0. 01 0. 05 PgC year -1 in Canada -1 in Canada et -1 in Canada -1 u00b1 -1 in Canada -1 in the U00b1 0. 01 -1 in Canada -1 in Central America -1 0 -1 in Central America -1 in the Caribbean -0 -1 in 0 -1 00b1 -1 0. 05 PgC year -1 0 in the 0 -011 -1 0 -1 0 -1 in -1 0 -1 0 0. 05 PgC year For all North America in the model ensemble, Losses of C due to fire account for 41% of the interannual variability in mean net biome productivity for both North America. In the simulations, we find that drought years have the ability to move the region to a small net C source in the simulations.

Source link: https://ui.adsabs.harvard.edu/abs/2022JGRG..12706904M/abstract


Comparative analysis of carbon cycle models via kinetic representations

A significant part of climate change research is the pre-industrial state of the global carbon cycle. This work extends the analysis of the two models' kinetic representations and investigates the similarities and differences in their geometric and dynamic characteristics in relation to model construction assumptions by using the mathematical principles of chemical reaction networks. In addition, we bring together earlier published findings about the two models' power law kinetic representations in order to solidify them with new observations here.

Source link: https://ui.adsabs.harvard.edu/abs/2022arXiv220912143F/abstract


Carbon footprint estimate from life cycle analysis for hybrid concentrating photovoltaic power generation

For which we will list GHG emissions, the product is a hybrid concentrating photovoltaic power generator made of a blend of flat-plate photovoltaic and concentrating photovoltaics. Primary optics of Fresnel lens primary optics in PMMA and silicone-on-glass are evaluated.

Source link: https://ui.adsabs.harvard.edu/abs/2022AIPC.2550f0002L/abstract


Consequential impacts of a net-zero carbon design: life cycle assessment of an active building

Life Cycle Assessment is the most commonly used method for determining whether a building meets a carbon emission target. These target values are intended to assist building designers in achieving aspirational net-zero carbon goals. The effects of a market's reaction to a change in demand for a product or process is examined by a competent LCA. This case, a modular off-site construction fabric; on-site energy production; and, on-site energy storage; and, on-site energy storage are all options that can be adopted at large scale to decarbonise the built environment. The initial tangible impacts from CLCA are 19% higher than those from ALCA, based on global warming potential that has been assessed over a 100-year time horizon. Within the CLCA results, the Frame contributed the most to the GWP 100, while External Walls contributed the most within the ALCA findings. CLCA can document the environmental consequences of the company's decision to build a net-zero built environment.

Source link: https://ui.adsabs.harvard.edu/abs/2022E&ES.1078a2091R/abstract


Glacial state of the global carbon cycle: time-slice simulations for the last glacial maximum with an Earth-system model

With a completely coupled comprehensive climate model, three time-slice carbon cycle simulations for the last glacial maximum constrained by the increase of dissolved inorganic carbon in the deep ocean were carried out. The three modelled LGM ocean states provided different physical characteristics in reaction to artificial freshwater influx, and, depending on the physical conditions, appropriate amounts of carbon and alkalinity were added to the ocean to meet paleo-data constraints. The simulations showed that the simulated glacial ocean states are compatible with the PI one in terms of carbon conservation. In all of the simulations, the amount of carbon added was in accordance with the inferred transfers of carbon within various reservoirs during the transition from the LGM to the pre-industrial period, implying that the simulated glacial ocean states are compatible with the PI one in terms of carbon content.

Source link: https://ui.adsabs.harvard.edu/abs/2022CliPa..18.1997K/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions