References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-10-5065-2010

A trajectory analysis of atmospheric transport of black carbon aerosols to Canadian high Arctic in winter and spring (1990–2005)

Huang

¹ Gong

S. L.

² Sharma

³ Lavoué

² Jia

C. Q.

Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5 Canada

Air Quality Research Division, Environment Canada, Toronto, ON M3H 5T4 Canada

Climate Research Division, Environment Canada, Toronto, ON M3H 5T4 Canada

04 06 2010

10 11 5065 5073

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Black carbon (BC) particles accumulated in the Arctic troposphere and deposited on snow have been calculated to have significant effects on radiative forcing of the Arctic regional climate. Applying cluster analysis technique on 10-day backward trajectories, seven distinct transport pathways (or clusters) affecting Alert (82.5° N, 62.5° W), Nunavut in Canada are identified in this work. Transport frequency associated with each pathway is obtained as the fraction of trajectories in that cluster. Based on atmospheric transport frequency and BC surface flux from surrounding regions (i.e. North America, Europe, and former USSR), a linear regression model is constructed to investigate the inter-annual variations of BC observed at Alert in January and April, representative of winter and spring respectively, between 1990 and 2005. Strong correlations are found between BC concentrations predicted with the regression model and measurements at Alert for both seasons (<i>R</i><sup>2</sup> equals 0.77 and 0.81 for winter and spring, respectively). Results imply that atmospheric transport and BC emission are the major contributors to the inter-annual variations in BC concentrations observed at Alert in the cold seasons for the 16-year period. Other factors, such as deposition, could also contribute to the variability in BC concentrations but were not considered in this analysis. Based on the regression model the relative contributions of regional BC emissions affecting Alert are attributed to the Eurasian sector, composed of the European Union and the former USSR, and the North American sector. Considering both seasons, the model suggests that former USSR is the major contributor to the near-surface BC levels at the Canadian high Arctic site with an average contribution of about 67% during the 16-year period, followed by European Union (18%) and North America (15%). In winter, the atmospheric transport of BC aerosols from Eurasia is found to be even more predominant with a multi-year average of 94%. The model estimates smaller contribution from the Eurasian sector in spring (70%) than that in winter. It is also found that the inter-annual variation in Eurasian contributions depends mainly on the reduction of emissions, while the changes in both emission and atmospheric transport contributed to the inter-annual variation of North American contributions.

References 1

% vor jede Referenz Barrie, L. A.: Arctic air-pollution – an overview of current knowledge, Atmos. Environ., 20, 643–663, 1986.

Bond, T. C., Streets, D. G., Yarber, K. F., Nelson, S. M., Woo, J. H., and Klimont, Z.: A technology-based global inventory of black and organic carbon emissions from combustion, J. Geophys. Res.-Atmos., 109(43), D14203, doi:10.1029/2003jd003697, 2004.

Bond, T. C., Bhardwaj, E., Dong, R., Jogani, R., Jung, S. K., Roden, C., Streets, D. G., and Trautmann, N. M.: Historical emissions of black and organic carbon aerosol from energy-related combustion, 1850–2000, Global Biogeochem. Cy., 21(16), GB2018, doi:10.1029/2006gb002840, 2007.

Chung, C. E., Ramanathan, V., Kim, D., and Podgorny, I. A.: Global anthropogenic aerosol direct forcing derived from satellite and ground-based observations, J. Geophys. Res.-Atmos., 110(17), D24207, doi:10.1029/2005jd006356, 2005.

Clarke, A. D. and Noone, K. J.: Soot in the Arctic snowpack – a cause for perturbations in radiative-transfer, Atmos. Environ., 19, 2045–2053, 1985.

Cooke, W. F., Liousse, C., Cachier, H., and Feichter, J.: Construction of a 1 degrees x 1 degrees fossil fuel emission data set for carbonaceous aerosol and implementation and radiative impact in the ECHAM4 model, J. Geophys. Res.-Atmos., 104, 22137–22162, 1999.

Dorling, S. R., Davies, T. D., and Pierce, C. E.: Cluster-analysis – a technique for estimating the synoptic meteorological controls on air and precipitation chemistry – method and applications, Atmos. Environ. A, 26, 2575–2581, 1992.

Eckhardt, S., Stohl, A., Beirle, S., Spichtinger, N., James, P., Forster, C., Junker, C., Wagner, T., Platt, U., and Jennings, S. G.: The North Atlantic Oscillation controls air pollution transport to the Arctic, Atmos. Chem. Phys., 3, 1769–1778, doi:10.5194/acp-3-1769-2003, 2003.

Flanner, M. G., Zender, C. S., Randerson, J. T., and Rasch, P. J.: Present-day climate forcing and response from black carbon in snow, J. Geophys. Res.-Atmos., 112(17), D11202, doi:10.1029/2006jd008003, 2007.

Gong, S. L., Zhao, T. L., Sharma, S., Toom-Sauntry, D., Lavoue, D., Zhang, X. B., Leaitch, W. R., and Barrie, L.: Identification of trends and inter-annual variability of sulphate and black carbon in the Canadian High Arctic: 1981 to 2007, J. Geophys. Res.-Atmos., 115, D07305, doi:10.1029/2009JD012943, 2010.

Hansen, J. and Nazarenko, L.: Soot climate forcing via snow and ice albedos, P. Natl. Acad. Sci. USA, 101, 423–428, doi:10.1073/pnas.2237157100, 2004.

Harris, J. M. and Kahl, J. D.: A Descriptive Atmospheric Transport Climatology for the Mauna-Loa-Observatory, Using Clustered Trajectories, J. Geophys. Res.-Atmos., 95, 13651–13667, 1990.

Harris, J. M. and Kahl, J. D. W.: Analysis of 10-Day Isentropic Flow Patterns for Barrow, Alaska – 1985–1992, J. Geophys. Res.-Atmos., 99, 25845–25855, 1994.

Huffman, G. J., Adler, R. F., Arkin, P., Chang, A., Ferraro, R., Gruber, A., Janowiak, J., McNab, A., Rudolf, B., and Schneider, U.: The Global Precipitation Climatology Project (GPCP) Combined Precipitation Dataset, B. Am. Meteorol. Soc., 78, 5–20, 1997.

Jacobson, M. Z.: Strong radiative heating due to the mixing state of black carbon in atmospheric aerosols, Nature, 409, 695–697, 2001.

Jacobson, M. Z.: Climate response of fossil fuel and biofuel soot, accounting for soot's feedback to snow and sea ice albedo and emissivity, J. Geophys. Res.-Atmos., 109(15), D21201, doi:10.1029/2004jd004945, 2004.

Kahl, J. D.: Characteristics of the Low-Level Temperature Inversion Along the Alaskan Arctic Coast, Int. J. Climatol., 10, 537–548, 1990.

Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K. C., Ropelewski, C., Wang, J., Leetmaa, A., Reynolds, R., Jenne, R., and Joseph, D.: The NCEP/NCAR 40-year reanalysis project, B. Am. Meteorol. Soc., 77, 437–471, 1996.

Kim, Y., Hatsushika, H., Muskett, R. R., and Yamazaki, K.: Possible effect of boreal wildfire soot on Arctic sea ice and Alaska glaciers, Atmos. Environ., 39, 3513–3520, doi:10.1016/j.atmosenv.2005.02.050, 2005.

Koch, D. and Hansen, J.: Distant origins of Arctic black carbon: A Goddard Institute for Space Studies ModelE experiment, J. Geophys. Res.-Atmos., 110(14), D04204, doi:10.1029/2004jd005296, 2005.

Kristjansson, J. E., Iversen, T., Kirkevag, A., Seland, O., and Debernard, J.: Response of the climate system to aerosol direct and indirect forcing: Role of cloud feedbacks, J. Geophys. Res.-Atmos., 110(13), D24206, doi:10.1029/2005jd006299, 2005.

Law, K. S. and Stohl, A.: Arctic air pollution: Origins and impacts, Science, 315, 1537–1540, 2007.

Lin, C. J., Cheng, M. D., and Schroeder, W. H.: Transport patterns and potential sources of total gaseous mercury measured in Canadian high Arctic in 1995, Atmos. Environ., 35, 1141–1154, 2001.

Quinn, P. K., Shaw, G., Andrews, E., Dutton, E. G., Ruoho-Airola, T., and Gong, S. L.: Arctic haze: current trends and knowledge gaps, Tellus B, 59, 99–114, 2007.

Ramanathan, V. and Carmichael, G.: Global and regional climate changes due to black carbon, Nat. Geosci., 1, 221–227, doi:10.1038/ngeo156, 2008.

Serreze, M. C. and Barry, R. G.: The Arctic Climate System, Cambridge Atmospheric and Space Science Series, edited by: Dessler, A. J., Houghton, J. T., and Rycroft, M. J., Cambridge University Press, New York, 412~pp., 2005.

Sharma, S., Lavoue, D., Cachier, H., Barrie, L. A., and Gong, S. L.: Long-term trends of the black carbon concentrations in the Canadian Arctic, J. Geophys. Res.-Atmos., 109(10), D15203, doi:10.1029/2003JD004331, 2004.

Sharma, S., Andrews, E., Barrie, L. A., Ogren, J. A., and Lavoue, D.: Variations and sources of the equivalent black carbon in the high Arctic revealed by long-term observations at Alert and Barrow: 1989–2003, J. Geophys. Res.-Atmos., 111(15), D14208, doi:10.1029/2005jd006581, 2006.

Sharma, S., Ishizawa, M., Chan, D., Lavoué, D., Leaitch, R., Worthy, D., Andrews, E., Eleftheriadis, K., Mefford, T., and Maksyutov, S.: Synoptic Transport of Anthropogenic BC to the Arctic, NOAA annual conference, Boulder, CO, 2009,

Shaw, G. E.: The arctic haze phenomenon, B. Am. Meteorol. Soc., 76, 2403–2413, 1995.

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., and Zuber, A.: A multi-model assessment of pollution transport to the Arctic, Atmos. Chem. Phys., 8, 5353–5372, doi:10.5194/acp-8-5353-2008, 2008.

Stohl, A.: Characteristics of atmospheric transport into the Arctic troposphere, J. Geophys. Res.-Atmos., 111(17), D11306, doi:10.1029/2005jd006888, 2006.

United Nations: The United Nations energy statistics database (2005), United Nations Statistics Division, New York, 5, 2007.

Warneke, C., Froyd, K. D., Brioude, J., Bahreini, R., Brock, C. A., Cozic, J., de Gouw, J. A., Fahey, D. W., Ferrare, R., Holloway, J. S., Middlebrook, A. M., Miller, L., Montzka, S., Schwarz, J. P., Sodemann, H., Spackman, J. R., and Stohl, A.: An important contribution to springtime Arctic aerosol from biomass burning in Russia, Geophys. Res. Lett., 37(5), L01801, doi:10.1029/2009gl041816, 2010.

Worthy, D. E. J., Trivett, N. B. A., Hopper, J. F., Bottenheim, J. W., and Levin, I.: Analysis of Long-Range Transport Events at Alert, Northwest-Territories, During the Polar Sunrise Experiment, J. Geophys. Res.-Atmos., 99, 25329–25344, 1994.