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Carbon Dioxide - Astrophysics Data System

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Last Updated: 10 September 2022

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Improvements of a low-cost CO2 commercial NDIR sensor for UAV atmospheric mapping applications

Unmanned Aerial Vehicles have proved a cost-effective way to fill up the gaps between in-situ and remote-sensing findings. In this research, a lightweight CO2 sensor system suitable for operations on board small UAVs has been designed and tested. For 1 Hz, a series of precision and linearity tests revealed that the precision is within 0. 1 ppm for 1u03c3 at 1 Hz. The developed system includes the ability to measure CO2 concentrations at 1 Hz and spatial gradients, as well as accurate plume dispersion charts. This paper provides an exemplary example of the process that will be followed for the integration of a lightweight atmospheric sensor into a mobile device. In this paper, the measurement system and field experiments were described to enhance future UAV platform applications for atmospheric trace gas measurements and closing the gaps in the current carbon cycle monitoring.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.5278L/abstract


Century scale CO2 pulses could substantially alter marine primary production, CaCO3 export, oxygen concentrations and DMS emissions

Both major amounts of anthropogenic CO2 emissions and a significant portion of the heat created by the enhanced greenhouse effect have historically played a key role in combating global warming by storing both large amounts of anthropogenic CO2 emissions and a significant portion of the heat generated by the increased greenhouse effect. For this reason, we are investigating the long-term effects that various scenarios of temporarily raising atmospheric CO2 levels in marine biogeochemistry within the HORIZON2020-COMFORT project. To this end, we use CLIMBER3alpha+C, an Earth system model of intermediate complexity, to investigate the ocean carbon cycle and related nutrients during and after periods of elevated atmospheric pCO2 levels. This raises the likelihood that elevated CO2 in the oceans and the marine carbon pump can cause a shift in both the Earth's radiative balance and the marine carbon pump long after atmospheric CO2 levels returned to preindustrial levels.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.5421L/abstract


The Effect of Calcium and Magnesium Ions on CO2 Convective Dissolution and Carbonate Precipitation

Our study seeks to investigate the effects of the initial host solution composition on CCS. We steadily inject CO2 gas above an alkaline aqueous solution of either calcium chloride and/or magnesium chloride, or calcium magnesium carbonate with a thin gap. In addition, a pH indicator in the initial metal salt solution shows the solution's acidification from CO2's constant rise.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..2413570K/abstract


Contributions of Climate Change, Vegetation Growth, and Elevated Atmospheric CO2 Concentration to Variation in Water Use Efficiency in Subtropical China

Ecosystem water use efficiency plays a significant part in maintaining ecosystems' equilibrium in terms of carbon assimilationu2013water balance. In this report, we investigated the spatial distribution of WUE in the STC and used ridge regression and path analysis to determine immediate and indirect impacts of climate change, vegetation growth, and increased atmospheric CO2 concentrations on the interannual trend in WUE. Based on the sensitivity of these variables' effects on WUE and the trends of the variables themselves, we then quantified the actual and relative contributions of these factors to WUE change. Both direct and indirect effects of Opposite contradict each other, but overall, there was a net positive effect of Ca and VPD on WUE. The findings of this research have ramifications for ecological management and restoration in subtropical regions around the world.

Source link: https://ui.adsabs.harvard.edu/abs/2022RemS...14.4296X/abstract


Drivers of the air-sea CO2 flux variability in the North Sea

To assess the effects of human interventions such as coastal alkalinity improvement on this societally vital ecosystem, it is crucial to determine the mechanisms that fuel the variability of the air-sea exchange of carbon dioxide in the North Sea. Here we present model results for a 5-year simulation, which are found to match well with the observations, indicating a net CO2 rise in the northern North Sea over the year, as well as a direct source of CO2 in the southern North Sea in summer. Despite the high temperature in summer that contributes to an increase of the CO2 flux, the 'Continental Shelf Pump' mechanism, contributing to the seasonal stratification and efficient carbon export, makes the ocean a net sink. In the shallower SNS, however, the temperature-driven release of CO2 defeats the biological CO2 drawdown.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.3634L/abstract


Passive CO2 mineralisation in slag: evidence from a slag heap in Lanarkshire, Scotland.

During the aging of silicate materials that are calcium/magnesium-rich and aluminum-poor, it is a natural process that occurs in nature. Using slag to sequester CO2 is particularly attractive because it is a by-product of a major industry and can use CO2 from the emission source, minimizing the need for CO2 and slag transportation, or drawing down CO2 already present in the atmosphere. Although the chemical composition of alkaline wastes indicates that CO2 capture can effectively reduce emissions from related industries, recent research shows that the CO2 capture of alkaline wastes in underutilized. To figure out the microstructures of CO2 mineralization in slag, we use image-based analysis. To visualize slag internal structures and determine reactive surface area and pore connectivity, we use X-ray Computed Tomography to illustrate slag internal structures and determine reactive surface area and pore connectivity. In our research, we use a slag sample obtained from the former Ravenscraig Steelworks in Lanarkshire, Scotland, where steelmaking took place from 1950 to 1992, leaving behind a slag stack that has been weathering since then. Calcium carbonate precipitates as pore-lining, according to our report. Engineered carbon mineralization in ultramafic rocks for CO2 removal from air (see also new findings). Legacy Iron and Steel Waste's Atmospheric Carbon Capture Results of Atmospheric Carbon Capture. The negative emission potential of alkaline products is negligible.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.6525K/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