Interactions between the hydrological cycle and atmospheric chemistry [Elektronische Ressource] / Meryem Tanarhte

Interactions between the hydrological cycleand atmospheric chemistryDissertationzur Erlangung des Grades"Doktor der Naturwissenschaften"im Promotionsfach Geologie/Pal˜aontologieam Fachbereich Chemie, Pharmazie und Geowissenschaftender Johannes Gutenberg-Universit˜at MainzMeryem Tanarhtegeb. in RabatMainz, 2008.AbstractThe land-atmosphere exchange of atmospheric trace gases is sensitive to meteorological condi-tionsandclimatechange. Itcontributesinturntotheatmosphericradiativeforcingthroughitsefiects on tropospheric chemistry. The interactions between the hydrological cycle and atmo-spheric processes are intricate and often involve difierent levels of feedbacks. The Earth systemmodel EMAC is used in this thesis to assess the direct role of the land surface components ofthe terrestrial hydrological cycle in the emissions, deposition and transport of key trace gasesthat control tropospheric chemistry. It is also used to examine its indirect role in changing thetroposphericchemicalcompositionthroughthefeedbacksbetweentheatmosphericandtheter-restrial branches of the hydrological cycle. Selected features of the hydrological cycle in EMACare evaluated using observations from difierent data sources. The interactions between precip-itation and the water vapor column, from the atmospheric branch of the hydrological cycle,and evapotranspiration, from its terrestrial branch, are assessed specially for tropical regions.