ALBERT

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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of statistical physics 33 (1983), S. 371-383 
    ISSN: 1572-9613
    Keywords: Mean spherical approximation ; classical one-component plasma ; charged hard spheres ; static correlation functions ; internal energy ; compressibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An exact solution of the mean spherical approximation for charged hard spheres in a neutralizing background is used to calculate various static properties of the classical one-component plasma in the strong coupling regime. The expressions involved are simple and analytic, and involve the charged hard sphere diameter as the only unknown parameter, which we determine using an approximate scaling property of the direct correlation function. Results obtained for structural correlation functions and various thermodynamic quantities are in very good agreement with the Monte Carlo simulation data.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2011-08-24
    Description: Measurements of peroxyacetyl nitrate (PAN), NO, NO2, HNO3, NOy (total odd nitrogen), and O3 were made in the high-latitude troposphere over North America and Greenland (35 degrees to 82 degrees N) during the Arctic Boundary Layer Expedition (ABLE 3A) (July-August 1988) throughout 0-to 6-km altitudes. These data are analyzed to quantitatively describe the relationships between various odd nitrogen species and assess their significance to global tropospheric chemistry. In the free troposphere, PAN was as much as 25 times more abundant than NOx. PAN to NOx ratio increased with increasing altitude and latitude. PAN was found to be the single most abundant reactive nitrogen species in the free troposphere and constituted a major fraction of NOy, PAN to NOy ratios were about 0.1 in the boundary layer and increased to 0.4 in the free troposphere. A 2-D global photochemical model with C1-C3 hydrocarbon chemistry is used to compare model predictions with measured results. A sizable portion (approximately 50%) of the gaseous reactive nitrogen budget is unaccounted for, and unknown organic nitrates and pernitrates are expected to be present. Model calculations (August 1, 70 degrees N) show that a major fraction of the observed NOx (50 to 70% of median) may find its source in the available PAN reservoir. PAN and the unknown reservoir species may have the potential to control virtually the entire NOx availability of the high latitude troposphere. It is predicted that the summer NOx and O3 mixing ratios in the Arctic/sub-Arctic troposphere would be considerably lower in the absence of the ubiquitous PAN reservoir. Conversely, this PAN reservoir may be responsible for the observed temporal increase in tropospheric O3 at high latitudes.
    Keywords: Exobiology
    Type: Journal of geophysical research (ISSN 0148-0227); Volume 97; D15; 16523-30
    Format: text
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