Seasonal variations in fire conditions are  important drivers in the trend of aerosol optical properties over the south-eastern Atlantic

Che, Haochi; Segal-Rozenhaimer, Michal; Zhang, Lu; Dang, Caroline; Zuidema, Paquita; Sedlacek III, Arthur J.; Zhang, Xiaoye; Flynn, Connor

doi:https://doi.org/10.5194/acp-22-8767-2022

Articles | Volume 22, issue 13

https://doi.org/10.5194/acp-22-8767-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

New observations and related modelling studies of the aerosol–cloud–climate...

https://doi.org/10.5194/acp-22-8767-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 13

Research article

|

07 Jul 2022

Research article |

| 07 Jul 2022

Seasonal variations in fire conditions are important drivers in the trend of aerosol optical properties over the south-eastern Atlantic

Haochi Che, Michal Segal-Rozenhaimer, Lu Zhang, Caroline Dang, Paquita Zuidema, Arthur J. Sedlacek III, Xiaoye Zhang, and Connor Flynn

Supplement

https://doi.org/10.5194/acp-22-8767-2022-supplement

Data sets

ERA5 monthly averaged data on single levels from 1959 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.f17050d7

MCD12Q1 MODIS/Terra+Aqua Land Cover Type Yearly L3 Global 500m SIN Grid V006 M. Friedl and D. Sulla-Menashe https://doi.org/10.5067/MODIS/MCD12Q1.006

MODIS Collection 6 Hotspot/Active Fire Detections MCD14ML NASA https://doi.org/10.5067/FIRMS/MODIS/MCD14ML

Landsat Archives – Landsat 8-9 Operational Land Imager and Thermal Infrared Sensor Collection 2 Level-1 Data USGS https://doi.org/10.5066/P975CC9B

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Short summary

A 17-month in situ study on Ascension Island found low single-scattering albedo and strong absorption enhancement of the marine boundary layer aerosols during biomass burnings on the African continent, along with apparent patterns of regular monthly variability. We further discuss the characteristics and drivers behind these changes and find that biomass burning conditions in Africa may be the main factor influencing the optical properties of marine boundary aerosols.