Ingjerd S. Krogseth
NILU – Norsk institutt for luftforskning
National and international regulatory strategies have resulted in decreasing concentrations of some legacy persistent organic pollutants (POPs) in the Arctic; but also development of replacement substances, of which some may have similar impacts on ecosystems as the legacy POPs. The main objective of this project is to increase the understanding of the link between long-range atmospheric transport (LRAT) and ecosystem exposure for selected contaminants of emerging concern (CECs) in Arctic areas. The activities during the two first years have focused on (i) extraction and analysis of selected CECs in air samples collected across Norway, (ii) collection, extraction, and analysis of samples from the subarctic lake Takvatn (Troms) for evaluation of the deposition and bioaccumulation potential of the same CECs, and (iii) presentation of preliminary results at international conferences and publication of a new bentho-pelagic bioaccumulation model. Modelling and dissemination activities will be the focus in 2019. The measurement results will be complemented by mechanistic modelling to (i) assess whether observed ecosystem exposures can be rationalized from measured air concentrations, and (ii) facilitate identification of key knowledge gaps and research needs. Hence, this project will provide results not only relevant for the scientific community, but also for national and international authorities involved in the regulation of chemicals, as well as key goals for the Fram flagship and the society in general.