Description: Das Projekt "Photochemical activity and solar ultraviolet radiation" wird vom Umweltbundesamt gefördert und von Technische Universität München, Forstwissenschaftliche Fakultät, Lehrstuhl für Bioklimatologie und Immissionsforschung durchgeführt. Objective: The objective of this project is to study the different steps in a sequence going from reduced stratospheric ozone through increased penetration of UV-B solar radiation through the atmosphere and increased photochemical activity in the lower atmosphere to the evaluation of the impact on regulations which aim at reducing ozone levels in polluted regions. It will be modelled and measured how ozone and other photochemically active species are affected by enhanced UV-B radiation in European regions with a strong influx of UV-B radiation during summer time and where significant increases in surface ozone levels have already been observed, for example in the Mediterranean region. For this specific task the Aegean sea and Athens basin have been selected for a campaign in this study. In this area, UV-B fluxes (and photochemical activity) during summertime are among the highest in Europe while different environmental quality conditions can be encountered in different sites. It is thus an area well suited for studies of the links between reductions in ozone column densities and enhanced surface fluxes of UV-B radiation. Similar studies of the UV-B/ozone relations will be performed in southern Germany (close to the Alps) where UV-B fluxes are also enhanced and where similar UV-B increases have been reported. General Information: The project involves one experimental part and one modelling part that also includes model validation through comparisons with the set of compounds which will be measured simultaneously during the proposed campaigns. The experimental part of the study includes two campaigns, one in Greece during summer 1996 and a second one in Bavaria during summer 1997. The campaign in Greece is jointly organized with the ATOP project to additionally provide actinic UV-B fluxes up to the tropopause and includes: 1.Continuous measurements of spectral UV-B irradiances with double monochromators (Brewer, double in Greece, Bentham in Bavaria) along with conventional total UV-B dosimeters (broad band). 2. Total columns of O3, SO2, aerosol vertical distribution with LIDAR and vertical ozone distribution with ozone sondes. 3. Photolysis rates of NO2 and O3. 4. Surface ozone, NO, NO2, CH2O, hydrocarbons and PAN. 5. Meteorological observations at ground, in the free troposphere and in the lower stratosphere. 6. Aircraft measurements of spectra of solar actinic fluxes, ozone, water vapour and formaldehyde. The modelling part includes two different types of models: 1. Calculation of solar fluxes and photo dissociation rates in polluted regions will be performed with a radiative transfer model which accurately calculates photo dissociation rates in the atmosphere at different locations, different solar elevation and different atmospheric conditions in which clouds and ... Prime Contractor: Aristotle University of Thessaloniki, Balkan Environmental Research and Development Institute, Physics Department; Thessaloniki; Greece.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wolkenbildung ? Stratosphärisches Ozon ? Wolke ? München ? Bewölkung ? Ozon ? Ozonwert ? Peroxyacetylnitrat ? Bayern ? Bioklimatologie ? Messgerät ? Meteorologischer Parameter ? Photooxidantien ? Alicyclischer Kohlenwasserstoff ? Athen ? Thessaloniki ? Dosimetrie ? Kohlenwasserstoff ? Lidar ? Solarstrahlung ? Stickstoffdioxid ? Strahlenwirkung ? Wasserdampf ? Formaldehyd ? UV-Strahlung ? Balkan ? Bundesrepublik Deutschland ? Griechenland ? Schwefeldioxid ? Messprogramm ? Photolyse ? Sommer ? Stickoxide ? Flugzeug ? Strahlungsmessung ? Strahlung ? Aerosol ? Geoinformation ? Troposphäre ? Standortwahl ? Dissoziation ? Schadstoffanalyse ? Strahlungsmodell ? Stratosphäre ? Studie ? Tropopause ? Umweltforschung ? Vertikalprofil ? Jahreszeit ? Wirkungsanalyse ? Witterung ? Kausalzusammenhang ? Meeresgewässer ? Luftfahrzeug ? Modellierung ? Photochemische Reaktion ? Forschung und Entwicklung ? Alpen ? Europa ? Oxidation ? Beleuchtungsstärke ? Ozonschicht ? Erdoberfläche ? Umweltqualität ? Kenngröße ? Atmosphäre ? Standortbedingung ? Atmosphärenchemie ? Ozonabbau ? Modellrechnung ? Sonde ? solar-actinic-flux ? Bentham ? Konzentrationsmessung ? double-monochromator ? Ozonbestimmung ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-02-01 - 1998-01-31
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