naa a22 4500 528786830 20180924065502.0 cr unu---uuuuu 180924s2008 xx s 000 0 eng 10.3929/ethz-b-000012581 doi 10.5194/acp-8-2313-2008 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/12581 Receptor modeling of C2-C7 hydrocarbon sources at an urban background site in Zurich, Switzerland: Changes between 1993-1994 and 2005-2006 [Elektronische Daten] [Valentin A. Lanz, Christoph Hueglin, Brigitte Buchmann, M. Hill, René Locher, Johannes Staehelin, Stefan Reimann] Atmos. chem. phys. Open access ethresearch Hourly measurements of 13 volatile hydrocarbons (C2-C7) were performed at an urban background site in Zurich (Switzerland) in the years 1993-1994 and again in 2005-2006. For the separation of the volatile organic compounds by gas-chromatography (GC), an identical chromatographic column was used in both campaigns. Changes in hydrocarbon profiles and source strengths were recovered by positive matrix factorization (PMF). Eight and six factors could be related to hydrocarbon sources in 1993-1994 and in 2005-2006, respectively. The modeled source profiles were verified by hydrocarbon profiles reported in the literature. The source strengths were validated by independent measurements, such as inorganic trace gases (NOx, CO, SO2), methane (CH4), oxidized hydrocarbons (OVOCs) and meteorological data (temperature, wind speed etc.). Our analysis suggests that the contribution of most hydrocarbon sources (i.e. road traffic, solvents use and wood burning) decreased by a factor of about two to three between the early 1990s and 2005-2006. On the other hand, hydrocarbon losses from natural gas leakage remained at relatively constant levels (−20%). The estimated emission trends are in line with the results from different receptor-based approaches reported for other European cities. Their differences to national emission inventories are discussed. Creative Commons Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0 ethresearch Lanz Valentin A. joint author Hueglin Christoph joint author Buchmann Brigitte joint author Hill M. joint author Locher René joint author Staehelin Johannes joint author Reimann Stefan joint author Atmospheric Chemistry and Physics Munich : European Geophysical Society 8 (9), pp. 2313-2332 1680-7375 http://hdl.handle.net/20.500.11850/12581 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/12581 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Lanz Valentin A. joint author ETHRESEARCH 700 1- Hueglin Christoph joint author ETHRESEARCH 700 1- Buchmann Brigitte joint author ETHRESEARCH 700 1- Hill M. joint author ETHRESEARCH 700 1- Locher René joint author ETHRESEARCH 700 1- Staehelin Johannes joint author ETHRESEARCH 700 1- Reimann Stefan joint author ETHRESEARCH 773 0- Atmospheric Chemistry and Physics Munich : European Geophysical Society 8 (9), pp. 2313-2332 1680-7375 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access