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  Actinic radiation and photolysis processes in the lower troposphere: Effect of clouds and aerosols

Junkermann, W., Brühl, C., Perner, D., Eckstein, E., Trautmann, T., Früh, B., et al. (2002). Actinic radiation and photolysis processes in the lower troposphere: Effect of clouds and aerosols. Journal of Atmospheric Chemistry, 42(1), 413-441.

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Genre: Journal Article
Alternative Title : J. Atmos. Chem.

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 Creators:
Junkermann, W., Author
Brühl, C.1, Author           
Perner, D.1, Author           
Eckstein, E.1, Author           
Trautmann, T., Author
Früh, B., Author
Dlugi, R., Author
Gori, T., Author
Ruggaber, A., Author
Reuder, J., Author
Zelger, M., Author
Hofzumahaus, A., Author
Kraus, A., Author
Rohrer, F., Author
Brüning, D., Author
Moortgat, G.1, Author           
Horowitz, A.1, Author           
Tadic, J.1, Author           
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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Free keywords: actinic radiation; aerosols; clouds; photolysis; spectroradiometry; 3D-model
 Abstract: Within the German Tropospheric Research Program (TFS) a series of projects were performed focussing on aspects of radiation transfer and the effects of UV-radiation on air chemistry. The individual projects covered laboratory investigations, instrument development for photolysis processes as well as field studies of actinic radiation and comparison to model calculations. One and three-dimensional models were tested against field campaign data. The results confirm the improvement of measurement technology achieved through deployment of new techniques like spectroradiometry that offer a wider range of investigations than was previously attainable using chemical actinometry or fixed wavelength filter radiometry. Reasonable agreement was also found between measurements and models for a few selected and well defined cloudy conditions. On the other hand, using simple stratiform geometry models yielded significant deviations between measurement and model in both directions particularly in the case of high zenith angles and with high aerosol load. Further tools both for experimental investigations and for model calculations were developed within the framework of the Troposphere Research Program (TFS) and deficiencies were identified demanding further investigations when broken clouds and more complex cloud layers prevail.

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Language(s): eng - English
 Dates: 2002-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 14638
ISI: 000175947400018
 Degree: -

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Title: Journal of Atmospheric Chemistry
  Alternative Title : J. Atmos. Chem.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 42 (1) Sequence Number: - Start / End Page: 413 - 441 Identifier: ISSN: 0167-7764