Description: Das Projekt "Investigation of the influences of halo chemistry on the oxidation capacitiy of the troposphere in mid-latitudes and the ozon budget including horizontal and vertical transport phenomena during long terms LOT" wird vom Umweltbundesamt gefördert und von Universität Heidelberg, Institut für Umweltphysik durchgeführt. Reactive Halogen Species (RHS) can severely impact tropospheric chemistry. The destruction of boundary layer ozone by catalytic reaction cycles involving bromine and chlorine has been observed in polar regions and at mid latitudes. Iodine compounds have been found in the marine troposphere, too, and are supposed to change the atmospheric chemistry significantly. In a joint project between the Hebrew University Jerusalem and the University of Heidelberg, who have previously cooperated successfully for a long time, we propose investigating the influence of Reactive Halogen Species on the tropospheric chemistry and its relation to transport processes. In previous projects performed by the present proposers, the highest levels of BrO and IO ever previously observed in the atmosphere were recorded. The formation of these reactive halogens was undoubtedly related to the chemical behaviour and especially ozone depletion processes observed in the troposphere. However, our investigations have also shown that transport phenomena must play an important role in RHS formation. Due to its unique geographical position, topography, meteorology and the chemical composition of the sea waters, the Dead Sea valley is an ideal natural laboratory for the proposed investigations. The questions that will be addressed in the proposed investigation will include the determination of the horizontal and vertical distribution of RHS at the Dead Sea by measuring transport phenoma as well as seasonal fluctuation (long term). The existence of reservoir gases like BrONO2 will be in focus (new interesting link between NO2& 8211; and halogen chemistry). This will enable a deeper understanding of the release mechanisms of RHS. These 3D-observations of RHS distribution over the Dead Sea, coupled with increased information regarding RHS formation and modelling studies will substantially expand our knowledge regarding tropospheric chemistry and especially ozone depletion chemistry and their dynamics on a regional and global scale.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Heidelberg ? Ozon ? Brom ? Bromid ? Bromkohlenwasserstoff ? Jerusalem ? Geografische Koordinaten ? Bromverbindung ? Chlorverbindung ? Fluorverbindung ? Halogen ? Halogenkohlenwasserstoffe ? Meerwasser ? Meteorologie ? Oxidationsmittel ? Stickstoffdioxid ? Jodverbindung ? Totes Meer ? Chemie ? Chemische Zusammensetzung ? Katalyse ? Topographie ? Luftschadstoff ? Studie ? Tropopause ? Troposphäre ? Meeresgewässer ? Polargebiet ? Ozonabbaupotenzial ? Chemikalien ? Modellierung ? Oxidation ? Atmosphärenchemie ? Gasspeicher ? Ozonabbau ? Grenzschicht ? Gewässer ? Tal ? Globale Aspekte ? Chemische Reaktion ? Atmosphäre ? Hydroxylradikal ? Reactive-Halogen-Species ? Horizontaler Austausch ? Vertikaler Austausch ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2004-01-01 - 2004-12-31
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