Originally published as: Schmidt, L. K., Bochow, M., Imhof, H. K., Oswald, S. E. (2018): Multi-temporal surveys for microplastic particles enabled by a novel and fast application of SWIR imaging spectroscopy – Study of an urban watercourse traversing the city of Berlin, Germany. - Environmental Pollution, 239, pp. 579—589. DOI: http://doi.org/10.1016/j.envpol.2018.03.097 1 Multi-temporal surveys for microplastic particles enabled by a novel and fast 2 application of SWIR imaging spectroscopy – Study of an urban watercourse 3 traversing the city of Berlin, Germany 4 L. Katharina Schmidt a *, Mathias Bochow b,c, Hannes K. Imhof c,d, Sascha E. Oswald a 5 a Institute of Earth and Environmental Science, Water and Matter Transport in Landscapes, University of 6 Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany 7 b Section 1.4 Remote Sensing, Helmholtz Centre Potsdam – GFZ German Research Centre for Geosciences, 8 Telegrafenberg, 14473 Potsdam, Germany 9 c Animal Ecology I, University of Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany 10 d Present address: Technische Universität München, Lehrstuhl für Aquatische Systembiologie, Mühlenweg 22, 11 85354 Freising-Weihenstephan 12 * Corresponding author: E-Mail:
[email protected] 1 13 Abstract 14 Following the widespread assumption that a majority of ubiquitous marine microplastic particles originate from 15 land-based sources, recent studies identify rivers as important pathways for microplastic particles (MPP) to the 16 oceans. Yet a detailed understanding of the underlying processes and dominant sources is difficult to obtain 17 with the existing accurate but extremely time-consuming methods available for the identification of MPP.