Source apportionment of circum-Arctic atmospheric black carbon from isotopes and modeling

Science Advances
Patrik WinigerÖrjan Gustafsson

Abstract

Black carbon (BC) contributes to Arctic climate warming, yet source attributions are inaccurate due to lacking observational constraints and uncertainties in emission inventories. Year-round, isotope-constrained observations reveal strong seasonal variations in BC sources with a consistent and synchronous pattern at all Arctic sites. These sources were dominated by emissions from fossil fuel combustion in the winter and by biomass burning in the summer. The annual mean source of BC to the circum-Arctic was 39 ± 10% from biomass burning. Comparison of transport-model predictions with the observations showed good agreement for BC concentrations, with larger discrepancies for (fossil/biomass burning) sources. The accuracy of simulated BC concentration, but not of origin, points to misallocations of emissions in the emission inventories. The consistency in seasonal source contributions of BC throughout the Arctic provides strong justification for targeted emission reductions to limit the impact of BC on climate warming in the Arctic and beyond.

References

Mar 17, 2007·Science·Kathy S Law, Andreas Stohl
Jan 24, 2009·Science·Orjan GustafssonHenning Rodhe
Jul 13, 2013·Environmental Science & Technology·Bing ChenÖrjan Gustafsson
May 26, 2016·Scientific Reports·Yousuke SatoTeruyuki Nakajima
Sep 16, 2016·Nature Communications·P WinigerÖ Gustafsson
Dec 21, 2016·Environmental Science & Technology·Bradley M Conrad, Matthew R Johnson
Feb 1, 2017·Proceedings of the National Academy of Sciences of the United States of America·Patrik WinigerÖrjan Gustafsson

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Citations

Jan 29, 2021·The Science of the Total Environment·Santanu Mukherjee, Manish Kumar
Jul 20, 2019·The Science of the Total Environment·Ling Qi, Shuxiao Wang
Mar 27, 2021·Environmental Science & Technology·Meri M RuppelÖrjan Gustafsson
Dec 17, 2019·Environmental Science & Technology·Matthew J GunschKerri A Pratt

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