Articles | Volume 21, issue 20
Atmos. Chem. Phys., 21, 15555–15567, 2021
https://doi.org/10.5194/acp-21-15555-2021

Special issue: Satellite and ground-based remote sensing of aerosol optical,...

Atmos. Chem. Phys., 21, 15555–15567, 2021
https://doi.org/10.5194/acp-21-15555-2021
Research article
18 Oct 2021
Research article | 18 Oct 2021

A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China

Zhenbin Wang et al.

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In this paper, by using WRF-Chem with a black carbon (BC) tagging technique, we investigate the formation mechanism and regional sources of a BC peak in the free troposphere observed by aircraft flights. Local sources dominated BC from the surface to about 700 m (78.5 %), while the BC peak in the free troposphere was almost entirely imported from external sources (99.8 %). Our results indicate that cyclone systems can quickly lift BC up to the free troposphere, as well as extend its lifetime.
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