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UP: Fachverband Umweltphysik

UP 10: Atmosphäre - Spurengase (Fortsetzung)

UP 10.1: Hauptvortrag

Donnerstag, 16. März 2017, 08:30–09:00, GW2 B3009

Application of the FTIR-spectroscopy in the infared via remote sensing and in-situ techniques for studying the carbon cycle — •Justus Notholt, Thorsten Warneke, Mathias Palm, Matthias Buschmann, Denise Müller, Christof Petri, Yuting Wang, and Zhiting Wang — IUP, University of Bremen

Remote sensing has been established as a powerful method for studying the atmospheric composition. Using the sun or moon as light source and working in the infrared spectral region using FTIR spectrometers allows measuring the total column concentrations of up to 20 atmospheric trace gases. Analyzing the spectral line shape allows for a few trace gases to derive the concentration profile in 2-4 atmospheric layers up to about 30 km. The observations at about 30 sites worldwide are organized in two international networks, the NDACC (Network for Atmospheric Composition Change) and TCCON (Total Carbon Column Observing Network). Together with model studies the observations have been used to study the atmospheric carbon cycle. Recent results will be presented and discussed.

The relevance of inland waters for the carbon cycle is not well known. Rivers are often treated as passive pipes, which means, the amount of carbon that enters the rivers reach the ocean. Recently an in situ measurement technique based on FTIR-spectrometry has been developed for studying the trace gas fluxes between inland waters and the atmosphere. FTIR spectrometry allows the simultaneous measurement of different trace gases and their isotopes in the atmosphere and in the water. Recent results will be presented and discussed.