Siberian Arctic black carbon sources constrained by model and observation

Winiger P, Andersson A, Eckhardt S, Stohl A, Semiletov IP, Dudarev OV, Charkin A, Shakhova N, et al. (2017). Siberian Arctic black carbon sources constrained by model and observation. Proceedings of the National Academy of Sciences: e201613401. DOI:10.1073/pnas.1613401114. (In Press)

[img] Text
PNAS-2017-Winiger-E1054-61.pdf - Published Version
Restricted to Repository staff only until September 2017.
Available under License Creative Commons Attribution Non-commercial.

Download (2MB)
Project: Isotope forensics meets biogeochemistry – linking sources and sinks of organic contaminants by compound specific isotope investigation (CSI:ENVIRONMENT, FP7 264329), Cryosphere-Carbon on Top of the Earth (CC-Top):Decreasing Uncertainties of Thawing Permafrost and Collapsing Methane Hydrates in the Arctic (CC-TOP, H2020 695331), Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants (ECLIPSE, FP7 282688)

Abstract

Black carbon (BC) in haze and deposited on snow and ice can have strong effects on the radiative balance of the Arctic. There is a geographic bias in Arctic BC studies toward the Atlantic sector, with lack of observational constraints for the extensive Russian Siberian Arctic, spanning nearly half of the circum-Arctic. Here, 2 y of observations at Tiksi (East Siberian Arctic) establish a strong seasonality in both BC concentrations (8 ng⋅m−3 to 302 ng⋅m−3) and dual-isotope–constrained sources (19 to 73% contribution from biomass burning). Comparisons between observations and a dispersion model, coupled to an anthropogenic emissions inventory and a fire emissions inventory, give mixed results. In the European Arctic, this model has proven to simulate BC concentrations and source contributions well. However, the model is less successful in reproducing BC concentrations and sources for the Russian Arctic. Using a Bayesian approach, we show that, in contrast to earlier studies, contributions from gas flaring (6%), power plants (9%), and open fires (12%) are relatively small, with the major sources instead being domestic (35%) and transport (38%). The observation-based evaluation of reported emissions identifies errors in spatial allocation of BC sources in the inventory and highlights the importance of improving emission distribution and source attribution, to develop reliable mitigation strategies for efficient reduction of BC impact on the Russian Arctic, one of the fastest-warming regions on Earth.

Item Type: Article
Uncontrolled Keywords: Arctic haze, atmospheric transport modeling, emission inventory, carbon isotopes, climate change
Research Programs: Air Quality & Greenhouse Gases (AIR)
Mitigation of Air Pollution (MAG)
Depositing User: Michaela Rossini
Date Deposited: 03 Feb 2017 10:26
Last Modified: 25 Apr 2017 14:31
URI: http://pure.iiasa.ac.at/14364

Actions (login required)

View Item View Item

International Institute for Applied Systems Analysis (IIASA)
Schlossplatz 1, A-2361 Laxenburg, Austria
Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313