Showing 21 - 37 results of 37 for search '"Neutralization (chemistry)"', query time: 0.49s Refine Results
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    The chemistry of daytime sprite streamers – a model study by H. Winkler, J. Notholt

    Published 2014-04-01
    “…The chemical processes in daytime sprite streamers in the altitude range of 30–54 km are investigated by means of a detailed ion–neutral chemistry model (without consideration of transport). …”
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  8. 28

    The atmospheric implications of radiation belt remediation by C. J. Rodger, M. A. Clilverd, Th. Ulich, P. T. Verronen, E. Turunen, N. R. Thomson

    Published 2006-08-01
    “…Here we consider the upper atmospheric consequences of an RBR system operating over either 1 or 10&nbsp;days. The RBR-forced neutral chemistry changes, leading to NO<sub>x</sub> enhancements and O<sub>x</sub> depletions, are significant during the timescale of the precipitation but are generally not long-lasting. …”
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  9. 29

    Sunset transition of negative charge in the D-region ionosphere during high-ionization conditions by P. T. Verronen, Th. Ulich, E. Turunen, C. J. Rodger

    Published 2006-03-01
    “…The solar proton event of October 1989 and especially the sunset of 23&nbsp;October is examined in this study of negative ion chemistry, which combines measurements of nitric oxide, electron density, and cosmic radio noise absorption with ion and neutral chemistry modelling. Model results show that the negative charge transition from electrons to negative ions during sunset occurs at altitudes below 80 km and is dependent on both ultraviolet and visible solar radiation. …”
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  10. 30

    Latitudinal extent of the January 2005 solar proton event in the Northern Hemisphere from satellite observations of hydroxyl by P. T. Verronen, C. J. Rodger, M. A. Clilverd, H. M. Pickett, E. Turunen

    Published 2007-11-01
    “…We also predict the hydroxyl changes with respect to the magnetic latitude by the Sodankylä Ion and Neutral Chemistry model, estimating the variable magnetic cutoff energies for protons using a parameterisation based on magnetosphere modelling and the planetary magnetic index <i>K<sub>p</sub></i>. …”
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    Article
  11. 31

    Thermal structure and dynamics of the Martian upper atmosphere at solar minimum from global circulation model simulations by T. Moffat-Griffin, T. Moffat-Griffin, A. D. Aylward, W. Nicholson

    Published 2007-11-01
    “…CO<sub>2</sub>, N<sub>2</sub> and O are treated as the major gases in MarTIM, and are mutually diffused (though neutral chemistry is ignored). The densities of other species (the minor gases), CO, Ar, O<sub>2</sub> and NO, are based on diffusive equilibrium above the turbopause. …”
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  12. 32

    Analysis and parameterisation of ionic reactions affecting middle atmospheric HO<sub>x</sub> and NO<sub>y</sub> during solar proton events by P. T. Verronen, R. Lehmann

    Published 2013-05-01
    “…Here we use the Sodankylä Ion and Neutral Chemistry model to calculate ionic production and loss rates of neutral HO<sub>x</sub> and NO<sub>y</sub> species, imposed by particle precipitation, for a range of atmospheric conditions and levels of ionization. …”
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    The primordial tRNA acceptor stem code from theoretical minimal RNA ring clusters by Jacques Demongeot, Hervé Seligmann

    Published 2020-01-01
    “…Hence RNA rings, as designed by the genetic code’s structure, simulate tRNA stem evolution and prebiotic history along neutral chemistry-driven mutation regimes.…”
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    Contribution of proton and electron precipitation to the observed electron concentration in October–November 2003 and September 2005 by P. T. Verronen, M. E. Andersson, A. Kero, C.-F. Enell, J. M. Wissing, E. R. Talaat, E. R. Talaat, K. Kauristie, M. Palmroth, T. E. Sarris, E. Armandillo

    Published 2015-03-01
    “…The EISCAT measurements are compared to the results from the Sodankylä Ion and Neutral Chemistry Model (SIC). The proton ionization rates are calculated by two different methods – a simple energy deposition calculation and the Atmospheric Ionization Model Osnabrück (AIMOS v1.2), the latter providing also the electron ionization rates. …”
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    Polar-night O<sub>3</sub>, NO<sub>2</sub> and NO<sub>3</sub> distributions during sudden stratospheric warmings in 2003–2008 as seen by GOMOS/Envisat by E. Kyrölä, P. T. Verronen, S.-M. Päivärinta, N. Kalakoski, V. F. Sofieva, L. Backman, J. Tamminen

    Published 2012-01-01
    “…To facilitate our analyses, we have used the temperature profiles data from the MLS (Microwave Limb Sounder) instrument on board the Aura satellite, as well as simulations by the FinROSE chemistry-transport model and the Sodankylä Ion and Neutral Chemistry model (SIC). NO<sub>3</sub> observations in the polar winter stratosphere during SSWs are reported for the first time. …”
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    Arecibo measurements of D-region electron densities during sunset and sunrise: implications for atmospheric composition by C. Baumann, A. Kero, S. Raizada, M. Rapp, M. Rapp, M. P. Sulzer, P. T. Verronen, P. T. Verronen, J. Vierinen

    Published 2022-08-01
    “…The electron density observations are compared to the one-dimensional Sodankylä Ion and Neutral Chemistry (SIC) model and a variant of the Whole Atmosphere Community Climate Model incorporating a subset SIC's ion chemistry (WACCM-D). …”
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