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Abstract

In this thesis, high temporal resolution time series of greenhouse gases measured at three stations in Germany - Heidelberg, Zugspitze and Schauinsland - are studied regarding local and regional emissions. The six years of CH4 and δ13C-CH4 measurements in Heidelberg reveal a mean source signature of -52.5±0.3‰ and a seasonal cycle with more biogenic and less fossil CH4 emissions in summer which is only partly explainable by residential heating. The analysis of emission inventories shows that EDGARv5.0 overestimates the impact of isotopic enriched sources like waste incineration, while the LUBW inventory underestimates emissions but represents the composition well. At Zugspitze, we have shown that CO2, CO and CH4 measurements at the mountain ridge are less influenced by local anthropogenic emissions than observations at Schneefernerhaus. Strong pollution events occur at Schneefernerhaus especially during the day and in winter. The careful manual quality control removes these peaks, but the diurnal CO2 cycles still indicate a small influence during the day. At Schauinsland measured CH4 shows strong spikes in summer months. We demonstrate that these pollution events originate from cows which graze in the nearby pastures. The REBS peak detection method is used to filter out the influenced data and shows that hourly CH4 averages can be shifted by them up to 50 ppb in summer and monthly values by ~1 ppb.