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  • 1
    Keywords: Geschichte 1970-1985 ; Atmospheric chemistry ; Air Pollution ; Forschungsbericht ; Atmosphäre ; Spurenelement ; Geschichte 1970-1985
    Type of Medium: Book
    Pages: VI, 443 S. , Ill., graph. Darst.
    ISBN: 352727703X
    Series Statement: Sonderforschungsbereiche
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    Language: German
    Note: Literaturverz. S. 394 - 396
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 338 (1980), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 338 (1980), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary During April 1964 and from August through September 1965 measurements have been performed on the Maui Island, Hawaii. The results can be summarized as follows: a) the spectral extinction coefficient has a diurnal variation. The greatest value is found during noon. Its wavelength dependency shows an ‘anomalous extinction’, the maximum of extinction is to be found at 0.55 μ (Figures 1–3). b) the spectral radiance distribution of the total sky indicates the tendency that the aerosol size distribution does not follow a continuous power law. The exponent for small particles seems to bev *〈4 (Figures 4–5). The distribution of the sky radiation is not symmetrically. Sometimes the minimum shifts out of sun's vertical. The theoretical values for a molecular atmosphere differ from the measured noticeable. c) the spectral sky radiance close to the sun results in an exponent of the aerosol size distributionv *=4 for particle radiir〉1 μ (Figure 8). d) the distribution of spectral degree of sky light polarization shows two maxima of polarization situated out of sun's vertical. This indicates a haze layer in the upper atmosphere (Figures 12–14). e) the number of the Aitken-nuclei 1965 is more than 250 per cm3, thus higher than 1964. This can be explained by the unusually weak trade wind circulation during summer 1965. The directly measured aerosol size distribution of a volume of air on the Haleakala summit follows a power law only approximately with the exponentv *=3. On sea level it is between 2 and 3. It is smaller than that for the total atmosphere. On the summit particles in extreme dry air were found as droplets too (13.3.4). f) Finally some measurement results of radiances and degrees of polarization are given for radiation which is reflected from the clouds underneath the Haleakala summit and from other objects (Figures 23–26).
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-0662
    Keywords: Holography in cloud physics ; cloud droplet size distribution ; FSSP-100 ; PVM-100
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract During the EUROTRAC Ground Based Cloud Experiment (GCE) 1990, a newly developed HODAR (Holographic Droplet and Acrosol Recording) was operated for the first time to measure cloud droplet size distributions by recording Fraunhofer in-line holograms of small cloud sample volumes in situ and analyzing the holographic images in the laboratory. This technical note compares the resulting size distributions with those obtained from two FSSP-100 laser optical particle counters. For all holograms analyzed during the GCE90 field experiment, the size distributions obtained from the two different methods agree well. Additionally, the liquid water contents (LWC) were measured directly by a Gerber particulate volume monitor PVM-100. The LWC calculated from the measured droplet size distributions deviate from the PVM-100 data.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of atmospheric chemistry 3 (1985), S. 171-185 
    ISSN: 1573-0662
    Keywords: Turbidity ; Variance of observations ; Trajectories ; Ozone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Whether in classical networks such as meteorological networks of in more recent ones of atmospheric chemistry, a wealth of data is at hand. These data have been evaluated in a manner depending on the purpose of the network. However, much more information is hidden in these time series and waits for discovery. Only the imagination of scientists is needed. Four examples are given which lead to new information about the atmospheric aerosol and the behaviour of the atmosphere. These examples are: “Atmospheric turbidity from sunshine recordings”, “Meteorological drainage area from the variance of observations”, “Location of point sources from air mass trajectories”, and “Total vertical ozone from turbidity measurements”.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Aerobiologia 16 (2000), S. 207-210 
    ISSN: 1573-3025
    Keywords: biological aerosol particles ; insoluble particles ; seasonal variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Primary biological aerosol particles are a ubiquitouscomponent of the atmospheric aerosol and have greatimportance within the whole atmosphere. Besides theireffect on air hygiene (i.e. causing allergic diseases), theycontribute to cloud and rain development. They amountto almost 25% of the total number of aerosolparticles both in dry air and in cloudwater. They showno seasonal variation in concentration but incomposition.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2022-07-06
    Description: During the third part of the Atlantic Expedition 1969 from 10° S to 60° N along 30 ° W, measurements of the complete size distribution of atmospheric aerosols over the whole size range from about 10-7 to 10-2 cm radius were made. This was possible by the simultaneous operation of different methods which are critically discussed. The results obtained are the first of its kind and are of general interest despite some methodical shortcomings. North of the equator the ship passed through air masses of West African origin and the influence of Sahara dust on the marine aerosols could be documented in a unique way. The Sahara dust component was restricted to the size range of 10-5 to 10-3 cm radius. Throughout the voyage particles up to 10-2 cm radius were always found to be present, similar to findings over continents. Of special interest is the observation that the size distribution extends to very small particles, suggesting continuous aerosol production over the ocean.
    Type: Article , PeerReviewed
    Format: text
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  • 9
    Publication Date: 2022-07-08
    Description: The Aitken particle size distribution in background aerosols was measured with a newly developed Diffusion Analyzer System. The measuring system and the inversion method is discussed critically. The several hundreds of measurements indicate that several maxima in the size distribution are present. Particles as small as 10-3 µm in radius are constantly observed. Measurements of other authors indicate similar results.
    Type: Article , PeerReviewed
    Format: text
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