A multi-model assessment of pollution transport to the Arctic

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Shindell, D., T, Chin, M., Dentener, F., Doherty, R., M, Faluvegi, G., Fiore, A., M, Hess, P., Koch, D., M, Mackenzie, I., A, Sanderson, M., G, Schultz, M., G, Schulz, M., Stevenson, D., S, Teich, H., Textor, C., Wild, O., Bergmann, D., J, Bey, I., Bian, H., Cuvelier, C., Duncan, B., N, Folberth, G., Horowitz, L., W, Jonson, J., Kaminski, J., W, Marmer, E., Park, R., Pringle, K., J, Schroeder, S., Szopa, S., Takemura, T., Zeng, G., Keating, T., J, Zuber, A.
• Other Authors: NASA Goddard Institute for Space Studies (GISS), NASA Goddard Space Flight Center (GSFC), Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Modélisation du climat (CLIM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2008
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Arctic; Greenland; black carbon
• Online Access: https://hal.science/hal-00328325; https://hal.science/hal-00328325v2/document; https://hal.science/hal-00328325v2/file/acp-8-5353-2008.pdf; https://doi.org/10.5194/acp-8-5353-2008

International audience We examine the response of Arctic gas and aerosol concentrations to perturbations in pollutant emissions from Europe, East and South Asia, and North America using results from a coordinated model intercomparison. These sensitivities to regional emissions (mixing ratio change per unit emission) vary widely across models and species. Intermodel differences are systematic, however, so that the relative importance of different regions is robust. North America contributes the most to Arctic ozone pollution. For aerosols Correspondence to: D. T. Shindell ([e-mail]) and CO, European emissions dominate at the Arctic surface but East Asian emissions become progressively more important with altitude, and are dominant in the upper tropo-sphere. Sensitivities show strong seasonality: surface sensitivities typically maximize during boreal winter for European and during spring for East Asian and North American emissions. Mid-tropospheric sensitivities, however, nearly always maximize during spring or summer for all regions. Deposi-tion of black carbon (BC) onto Greenland is most sensitive to North American emissions. North America and Europe each contribute ∼40% of total BC deposition to Greenland, with ∼20% from East Asia. Elsewhere in the Arctic, both sensitivity and total BC deposition are dominated by Euro-Published by Copernicus Publications on behalf of the European Geosciences Union. 5354 Multi-model assessment of pollution transport to the Arctic: D. T. Shindell et al. pean emissions. Model diversity for aerosols is especially large, resulting primarily from differences in aerosol physical and chemical processing (including removal). Comparison of modeled aerosol concentrations with observations indicates problems in the models, and perhaps, interpretation of the measurements. For gas phase pollutants such as CO and O 3 , which are relatively well-simulated, the processes contributing most to uncertainties depend on the source region and altitude examined. Uncertainties in the ...