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Zhang, Y.* ; Su, H.* ; Kecorius, S. ; Ma, N.* ; Wang, Z.* ; Sun, Y.* ; Zhang, Q.* ; Poeschl, U.* ; Wiedensohler, A.* ; Andreae, M.O.* ; Cheng, Y.*

Extremely low-volatility organic coating leads to underestimation of black carbon climate impact.

One Earth 6, 158-166 (2023)
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Open Access Hybrid
Creative Commons Lizenzvertrag
Black carbon (BC) aerosols play an important role in climate systems. Estimating BC's radiative effect requires knowledge of its mixing state and light absorption enhancement resulting from coatings by other materials. Observational studies have reported much lower light absorption enhancement factors (Eabs) than expected from laboratory studies and model estimates. This has led to an intensive debate on the true magnitude of BC's climate impact. We find that the observed, apparently small Eabs cannot reflect the overall effect of BC coatings, as it does not include the persisting absorption enhancement by extremely low-volatility (eLV) organics that remain on the BC particles after passing through thermodenuders. Our observations show that eLV organics are extensively present in BC coatings, with a mass fraction of-5%-100%. Accounting for these eLV coatings, the observation estimates of Eabs increase substantially to up to 1.8-2.0. Our results highlight a strong radiative warming effect from atmospheric BC.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Radiative Absorption Enhancements; Aerosol Light-absorption; Mixing State; Brown Carbon; Ambient Black; Dependence; Density; Soot
Language english
Publication Year 2023
HGF-reported in Year 2023
ISSN (print) / ISBN 2590-3330
e-ISSN 2590-3322
Journal One Earth
Quellenangaben Volume: 6, Issue: 2, Pages: 158-166 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place 50 Hampshire St, Floor 5, Cambridge, Ma 02139 Usa
Reviewing status Peer reviewed
Institute(s) Institute of Epidemiology (EPI)
POF-Topic(s) 30202 - Environmental Health
Research field(s) Genetics and Epidemiology
PSP Element(s) G-504000-004
DOI 10.1016/j.oneear.2023.01.009
WOS ID 001018134700001
Erfassungsdatum 2024-01-17
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