Effect of Shipping Emissions on Present and Future Atmospheric Composition Over the Barents Sea

• Main Authors: Daskalakis, Nikolaos, Raut, Jean-Christophe, Law, Kathy S., Marelle, Louis, Thomas, Jennie L., Onishi, Tatsuo
• Other Authors: TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2016
• Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDE]Environmental Sciences; Arctic; Barents Sea; Norway; black carbon; North East Passage
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-01403339

International audience The Arctic is undergoing unprecedented changes as a result of rapid warming and socio-economic drivers. Even though the region is a receptor for anthropogenic pollution from the highly populated mid-latitudes, there are also local sources of pollution, such as shipping, that are already perturbing atmospheric composition. The Barents Sea, located off the northern coasts of Norway and Russia, has year-round shipping traffic and is likely to grow in a warming Arctic because of the economic benefits related to the opening up of the North-East passage placing it in a strategic position for the transport of goods between Europe and Asia. An increase in the marine traffic has already been observed over the past years in this region, resulting in increased emissions of pollutants.In this work, we investigate the impact of the shipping emissions in the Barents Sea on atmospheric composition for the summer period (July/August) with high traffic using the regional chemistry-aerosol transport model WRF-Chem run at high resolution over the region. We quantify the effects of shipping pollution on aerosol concentrations, such as black carbon, sulphate (SO 4 2- ), nitrate (NO 3 -) , and secondary organic aerosols (SOA) as well as deposition of potentially important nutrients (NO 3 - , SO 4 2- ). The model is run using an analytical chemical mechanism for gas phase and aerosols (SAPRC99 coupled with VBS and MOSAIC) for present-day (2012) and future (2050) conditions with ECLIPSE anthropogenic emissions and Winther et al. (2014) shipping emissions. Present-day simulations are evaluated against available data. We examine different future growth scenarios taking into account current and proposed ship operation regulations, such as CLE (current legislation) and HGS (high growth scenario), to investigate possible future changes in surface concentrations, tropospheric burdens and deposition fluxes. Potential chemistry-climate feedbacks are also examined such as those related to aerosol-cloud interactions or ...