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  • 78.35  (1)
  • Trace gases  (1)
  • 1980-1984  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Generation of acoustic surface waves on GaAs by photoexcitation (1982)
    Springer
    Applied physics 28 (1982), S. 211-214 
    Details
    ISSN: 1432-0630
    Keywords: 78.35 ; 68.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In the experiments reported here we observed the generation of non-thermal, large amplitude acoustic surface waves at GHz frequencies on the surface of a GaAs crystal under intense illumination with 514.5 nm radiation from an Ar+ laser at room temperature. The acoustic surface waves were detected by optical Brillouin spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618696
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Trace gas measurements during aircraft flights in the tropopause region over Europe and North Africa (1984)
    Springer
    Journal of atmospheric chemistry 2 (1984), S. 133-143 
    Details
    ISSN: 1573-0662
    Keywords: Trace gases ; methane ; carbon monoxide ; nitrous oxide ; distribution ; tropospheric-stratospheric exchange
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract During aircraft flights in May 1981 from Munich (40°N) to north of the Spitsbergen Islands (82°N) and to Monrovia, Liberia (6°N), air samples were obtained in the altitude range of 8 to 11 km and during the ascents and descents near the airports. These samples have been analyzed for the trace gas mixing ratios of CH4, CO and N2O. The results of these analyses are presented and discussed. The results provide new evidence of tropospheric-stratospheric exchange events in the vicinity of the subpolar and subtropical tropopause foldings and possibly show a case of transport of CO-enriched air in the upper troposphere above the North Atlantic Ocean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00114127
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