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

Journal Article · · Science Advances
 [1];  [2];  [2];  [3];  [3];  [4];  [5];  [5];  [5];  [5];  [6];  [6];  [7];  [8];  [8];  [9];  [4];  [4];  [4]
  1. Stockholm Univ. (Sweden); Vrije Univ., Amsterdam (Netherlands); DOE/OSTI
  2. Baylor Univ., Waco, TX (United States)
  3. Environment and Climate Change Canada, Toronto, ON (Canada)
  4. Stockholm Univ. (Sweden)
  5. Norwegian Inst. for Air Research (NILU), Kjeller (Norway)
  6. International Institute for Applied Systems Analysis (IIASA), Laxenburg (Austria)
  7. Russian Academy of Sciences (RAS), Vladivostok (Russian Federation). Pacific Oceanological Institute; Univ. of Alaska, Fairbanks, AK (United States); Tomsk National Research Polytechnic Institute (Russian Federation)
  8. Russian Academy of Sciences (RAS), Vladivostok (Russian Federation). Pacific Oceanological Institute; Tomsk National Research Polytechnic Institute (Russian Federation)
  9. Univ. of Alaska, Fairbanks, AK (United States); Tomsk National Research Polytechnic Institute (Russian Federation)
+ Show Author Affiliations
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.
Research Organization:
DOE Office of Science Atmospheric Radiation Measurement (ARM) Program (United States)
Sponsoring Organization:
European Research Council (ERC); Russian Government; Russian Scientific Foundation; Swedish Energy Agency; Swedish Research Council Formas; Swedish Research Council VR Distinguished Professor Grant; USDOE
OSTI ID:
1626003
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 2 Vol. 5; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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