Field comparison of dual- and single-spot Aethalometers: equivalent black carbon, light absorption, Ångström exponent and secondary brown carbon estimations

Wu, Liangbin; Wu, Cheng; Deng, Tao; Wu, Dui; Li, Mei; Li, Yong Jie; Zhou, Zhen

doi:https://doi.org/10.5194/amt-17-2917-2024

Articles | Volume 17, issue 9

https://doi.org/10.5194/amt-17-2917-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-17-2917-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 9

Research article

|

14 May 2024

Research article |

| 14 May 2024

Field comparison of dual- and single-spot Aethalometers: equivalent black carbon, light absorption, Ångström exponent and secondary brown carbon estimations

Liangbin Wu, Cheng Wu, Tao Deng, Dui Wu, Mei Li, Yong Jie Li, and Zhen Zhou

Supplement

https://doi.org/10.5194/amt-17-2917-2024-supplement

Model code and software

Scatter Plot Cheng Wu https://doi.org/10.5281/zenodo.832416

Histbox Cheng Wu https://doi.org/10.5281/zenodo.832405

Aethalometer data processor Cheng Wu https://doi.org/10.5281/zenodo.832403

Short summary

Field comparison of dual-spot (AE33) and single-spot (AE31) Aethalometers by full-year collocated measurements suggests that site-specific correction factors are needed to ensure the long-term data continuity for AE31-to-AE33 transition in black carbon monitoring networks; b_abs agrees well between AE33 and AE31, with slight variations by wavelength (slope: 0.87–1.04; R²: 0.95–0.97). A ~ 20 % difference in secondary brown carbon light absorption was found between AE33 and AE31.