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1. Cross Sections for Electron Collisions with the CO2 Molecule and CO2+ Molecular Ion

   https://doi.org/10.1063/5.0215796  

   Song, Mi-Young; Cho, Hyuck; Karwasz, Grzegorz P; Kokoouline, Viatcheslav; Tennyson, Jonathan (September 2024, Journal of Physical and Chemical Reference Data)
2. CO2 surface variability: from the stratosphere or not?

   Michael J. Prather (April 2022, Earth system dynamics)

   Ning Zeng (Ed.)

   Fluctuations in atmospheric CO2 can be measured with great precision and are used to identify human-driven sources as well as natural cycles of ocean and land carbon. One source of variability is the stratosphere, where the influx of aged CO2-depleted air can produce fluctuations at the surface. This process has been speculated to be a potential source of interannual variability (IAV) in CO2 that might obscure the quantification of other sources of IAV. Given the recent success in demonstrating that the stratospheric influx of N2O- and chlorofluorocarbon-depleted air is a dominant source of their surface IAV in the Southern Hemisphere, I apply the same model and measurement analysis here to CO2. Using chemistry-transport modeling or scaling of the observed N2O variability, I find that the stratosphere-driven surface variability in CO2 is at most 10% of the observed IAV and is not an important source. Diagnosing the amplitude of the CO2 annual cycle and its increase from 1985 to 2021 through the annual variance gives rates similar to traditional methods in the Northern Hemisphere (BRW, MLO) but can identify the emergence of small trends (0.08 ppm per decade) in the Southern Hemisphere (SMO, CGO). 

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3. Enhanced metamorphic CO2 release on the Proterozoic Earth

   https://doi.org/10.1073/pnas.2401961121  

   Stewart, E M; Penman, Donald E (October 2024, Proceedings of the National Academy of Sciences)

   Rock metamorphism releases substantial CO2 over geologic timescales (>1 My), potentially driving long-term planetary climate trends. The nature of carbonate sediments and crustal thermal regimes exert a strong control on the efficiency of metamorphic CO2 release; thus, it is likely that metamorphic CO2 degassing has not been constant throughout time. The Proterozoic Earth was characterized by a high proportion of dolomite-bearing mixed carbonate-silicate rocks and hotter crustal regimes, both of which would be expected to enhance metamorphic decarbonation. Thermodynamic phase equilibria modeling predicts that the metamorphic carbon flux was likely ~1.7 times greater in the Mesoproterozoic Era compared to the modern Earth. Analytical and numerical approaches (the carbon cycle model PreCOSCIOUS) are used to estimate the impact this would have on Proterozoic carbon cycling and global atmospheric compositions. This enhanced metamorphic CO2 release alone could increase pCO2 by a factor of four or more when compared to modern degassing rates, contributing to a stronger greenhouse effect and warmer global temperatures during the expansion of life on the early Earth. 

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4. The current status of high temperature electrochemistry-based CO2 transport membranes and reactors for direct CO2 capture and conversion

   https://doi.org/10.1016/j.pecs.2020.100888  

   Zhang, Peng; Tong, Jingjing; Huang, Kevin; Zhu, Xuefeng; Yang, Weishen (January 2021, Progress in Energy and Combustion Science)

   null (Ed.)
5. The nexus of the indoor CO2 concentration and ventilation demands underlying CO2-based demand-controlled ventilation in commercial buildings: A critical review

   https://doi.org/10.1016/j.buildenv.2022.109116  

   Lu, Xing; Pang, Zhihong; Fu, Yangyang; O'Neill, Zheng (June 2022, Building and Environment)