Oslo joint seminar in atmospheric, ocean and climate science, Nov. 28

Title: Trends in Black Carbon and Ultrafine Particles in Germany - Long-Term Observations of the German Ultrafine Aerosol Network (GUAN)

Speaker:  Alfred Wiedensohler,  TROPOS Leipzig

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Alfred Wiedensohler, TROPOS Leipzig

Please, note that the seminar starts at 14:00



Anthropogenic emissions contribute significantly to particulate air pollution. As a result, climate actions since the 1990s have been done to reduce emissions of anthropogenic air pollution in Europe. To assess the effectiveness of these mitigation measures, the German Ultrafine Aerosol Network (GUAN) was founded in 2008. Focal points here are the black carbon and ultrafine particles. In this study, trends in particle number concentration (PNC) and mass concentration of equivalent black carbon (eBC) over a 10-year period (2009-2018) were evaluated for 16 monitoring stations in different environments in Germany. The trend analysis was performed on both the full-length and sub-series time series to test the reliability of the results. The results generally show decreasing trends of both the PNCs for all size ranges and the eBC mass concentrations in all environments except the 10-30 nm PNCs in the regional and mountainous regions. The most significant decrease was observed on working days and in urban areas during the day, which implies strong evidence of reduced anthropogenic emissions. This became particularly evident in the accompanying measurements on the effectiveness of the environmental zone, which was introduced in Leipzig from March 2011.


What is the Joint Oslo Seminar (JOS):

Atmospheric and climate sciences have a stronghold in Oslo among the four institutions University of Oslo, the Meteorological Institute, CICERO and NILU. This joint seminar invites renowned international experts to contribute to an informal series of lectures, meant to create interaction with the Oslo atmospheric and climate science community on recent highlights and analysis in the field.

Published Aug. 14, 2019 12:41 PM - Last modified Nov. 25, 2019 8:32 AM