Measurements to determine the mixing state  of black carbon emitted from the 2017–2018  California wildfires and urban Los Angeles

Ko, Joseph; Krasowsky, Trevor; Ban-Weiss, George

doi:https://doi.org/10.5194/acp-20-15635-2020

Articles | Volume 20, issue 24

https://doi.org/10.5194/acp-20-15635-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-15635-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 24

Research article

|

17 Dec 2020

Research article |

| 17 Dec 2020

Measurements to determine the mixing state of black carbon emitted from the 2017–2018 California wildfires and urban Los Angeles

Joseph Ko, Trevor Krasowsky, and George Ban-Weiss

Supplement

https://doi.org/10.5194/acp-20-15635-2020-supplement

Data sets

Time Series Data for Catalina Island rBC Measurements 2017-2018 J. Ko https://doi.org/10.7910/DVN/UJAGHY

rBC Coating Thickness from Catalina Island rBC Measurements 2017-2018 J. Ko https://doi.org/10.7910/DVN/AAYMHH

rBC Size Distribution from Catalina Island rBC Measurements 2017-201 J. Ko https://doi.org/10.7910/DVN/CIMVS4

Video supplement

CAMS model output showing the Camp Fire and Southern California plumes during the November 2017 campaign J. Ko https://doi.org/10.5446/42893

NASA MODIS images showing the Camp Fire plume during the November 2017 campaign J. Ko https://doi.org/10.5446/42892

CAMS model output showing the Camp Fire plume reaching Southern California during the December 2018 campaign J. Ko https://doi.org/10.5446/42943

Large-scale circulation of aerosols off the California coast during the December 2018 Campaign J. Ko https://doi.org/10.5446/42942

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Short summary

Black carbon (BC) is the second strongest climate forcing pollutant in the atmosphere, after carbon dioxide. Here, we seek to understand how BC microphysical properties vary with atmospheric contexts, as these properties can influence its radiative forcing. Consistent with previous studies, we found that biomass burning BC had thicker coatings and larger core diameters than fossil fuel BC. We also present evidence to show that atmospheric aging also increases BC coating thickness.