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  • Articles: DFG German National Licenses  (2)
  • 1995-1999  (1)
  • 1980-1984  (1)
  • Arctic  (1)
  • Syndipnus rubiginosus  (1)
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  • Articles: DFG German National Licenses  (2)
Material
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  • 1995-1999  (1)
  • 1980-1984  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    A Technique for Estimating Polar Ozone Loss: Results for the Northern 1991/92 Winter Using EASOE Data (1999)
    Springer
    Journal of atmospheric chemistry 34 (1999), S. 365-383 
    Details
    ISSN: 1573-0662
    Keywords: stratospheric ozone ; Arctic ; chemical loss
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract In this paper we describe a technique for estimating chemical ozone loss in the Arctic vortex. Observed ozone and temperature profiles are combined with the model potential vorticity field to produce time series of vortex averaged ozone mixing ratios on chosen isentropic surfaces. Model-derived radiative heating rates and observed vertical gradients of ozone are then used to estimate the change in ozone that would occur due to diabatic descent. Discrepancies with the observed ozone are interpreted as being of chemical origin, assuming that there is negligible horizontal transport or mixing of air into the vortex. The technique is illustrated using ozone sonde measurements collected during the 1991/92 European Arctic Stratospheric Ozone Experiment (EASOE), meteorological analyses from the European Centre for Medium-range Weather Forecasts (ECMWF) and radiative heating rates extracted from the Global Atmospheric Modelling Programme (UGAMP) 3D General Circulation Model. Our results show that there was photochemical ozone destruction inside the Arctic vortex in early 1992 with a loss between 475 K and 550 K (around 20 km) of 0.32±0.15 ppmv in the first 20 days of January, equivalent to a rate of 0.51±0.24%/day (at the 95% confidence level).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006273211790
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ethyl (Z)-9-hexadecenoate a sex pheromone ofSyndipnus rubiginosus, a sawfly parasitoid (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 291-300 
    Details
    ISSN: 1573-1561
    Keywords: Sex pheromone ; Hymenoptera ; Ichneumonidae ; Syndipnus rubiginosus ; ethyl (Z)-9-hexadecenoate ; parasitoid ; Pikonema alaskensis ; mass spectra ; ozonolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A female-produced sex pheromone ofSyndipnus rubiginosus Walley (Hymenoptera: Ichneumonidae), a parasitoid of the yellowheaded spruce sawfly,Pikonema alaskensis (Rohwer) (Hymenoptera: Tenthredinidae), was isolated and identified from hexane extracts of 250 virgin females. Column chromatography (Florisil), gas chromatography, mass spectrometry, high performance liquid chromatography, and ozonolysis indicated the structure was ethyl (Z)-9-hexadecenoate. The optimum male response is at 300–1000 ng (3–10FE). No cross-attraction betweenS. rubiginosus and the sympatric sawfly parasitoidS. gaspesianus (Provancher) could be demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987857
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    Paper (German National Licenses)
    Fulltext
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