Suchergebnisse

This book is to facilitate interactions among researchers in the key areas of field measurements, laboratory studies and modeling who have experience in air chemistry of the continental lower troposphere, the stratosphere and its polar regions. These interactions have become increasingly important since it is apparent that the arctic troposphere plays an important role in environmental concerns with respect to global change. It is a unique chemical reactor influenced by human activity and the Arctic Ocean. In winter industrialized continents contribute gaseous and particulate pollution. It is underlain by the flat Arctic Ocean from which it is separated by a crack-ridden ice membrane 3-4 m thick. Ocean to atmosphere exchange of heat, water vapor and marine biogenic gases influence the composition of the reactor

Emission von Spurenstoffen -- Physikalisch-chemische Eigenschaften der reinen und verschmutzten Atmosphäre -- Grundlagen der chemischen Kinetik -- Radikale in der reinen und verschmutzten Atmosphäre -- Chemische Reaktionen von SO2, NOx und organischen Verbindungen -- Chemische Reaktionen in der Stratosphäre -- Grundlagen der Aerosolphysik und Aerosolchemie -- Chemische Reaktionen von Gasen und Aerosolen in Regen- und Wolkentropfen und ihre feuchte und trockene Deposition -- Atmosphärische Spurenstoffe im Niederschlagwasser: Konzentration und chemisches Verhalten -- Diffusionsvorgänge in der unteren Atmosphäre -- Trockene Deposition reaktionsträger Substanzen, beschrieben mit einem diagnostischen Simulationsmodell der bodennahen Luftschicht -- Theoretische Grundlagen der Aerosol-Scavenging- Modellierung -- Modellrechnungen zur Chemie der Atmosphäre -- Chemische Umsetzungen in Ausbreitungsrechnungen.

The formation, transport and impact of photo-oxidants, e.g., ozone, is a major environmental problem in densely populated areas with corresponding high emissions of ozone precursor substances such as NOx and volatile organic carbon compounds (VOC). Although major progress has been achieved within the last decade, there are still significant uncertainties in our understanding of the chemical behavior of the polluted atmosphere, in particular the interaction between cities and surrounding areas as well as the contribution of pollution to the global changes, e.g., the oxidation capacity of the troposphere. This book focuses on specific issues related to the chemistry of polluted atmospheres. The main issues cover areas such as modelling, emission inventories, chemical transformation as well as transport of pollutants on an urban/regional scale. The overall topic of the book is addressed in an interdisciplinary approach. The book is of specific interest for advanced researchers in tropospheric chemistry, from the PhD or post-doctoral levels and beyond