Organic enrichment in droplet residual particles relative to out of cloud over the northwestern Atlantic: analysis of airborne ACTIVATE data

Dadashazar, Hossein; Corral, Andrea F.; Crosbie, Ewan; Dmitrovic, Sanja; Kirschler, Simon; McCauley, Kayla; Moore, Richard; Robinson, Claire; Schlosser, Joseph S.; Shook, Michael; Thornhill, K. Lee; Voigt, Christiane; Winstead, Edward; Ziemba, Luke; Sorooshian, Armin

doi:https://doi.org/10.5194/acp-22-13897-2022

Articles | Volume 22, issue 20

https://doi.org/10.5194/acp-22-13897-2022

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

Special issue:

Marine aerosols, trace gases, and clouds over the North Atlantic...

https://doi.org/10.5194/acp-22-13897-2022

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

Articles | Volume 22, issue 20

Research article

|

28 Oct 2022

Research article |

| 28 Oct 2022

Organic enrichment in droplet residual particles relative to out of cloud over the northwestern Atlantic: analysis of airborne ACTIVATE data

Hossein Dadashazar, Andrea F. Corral, Ewan Crosbie, Sanja Dmitrovic, Simon Kirschler, Kayla McCauley, Richard Moore, Claire Robinson, Joseph S. Schlosser, Michael Shook, K. Lee Thornhill, Christiane Voigt, Edward Winstead, Luke Ziemba, and Armin Sorooshian

Supplement

https://doi.org/10.5194/acp-22-13897-2022-supplement

Data sets

ACTIVATE Falcon In Situ Aerosol Data NASA/LARC/SD/ASDC https://doi.org/10.5067/ASDC/ACTIVATE_Aerosol_AircraftInSitu_Falcon_Data_1

ACTIVATE Falcon In Situ Cloud Data NASA/LARC/SD/ASDC https://doi.org/10.5067/ASDC/ACTIVATE_Cloud_AircraftInSitu_Falcon_Data_1

ACTIVATE Falcon In-Situ Meteorological and Navigational Data NASA/LARC/SD/ASDC https://doi.org/10.5067/ASDC/ACTIVATE_MetNav_AircraftInSitu_Falcon_Data_1

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Short summary

Multi-season airborne data over the northwestern Atlantic show that organic mass fraction and the relative amount of oxygenated organics within that fraction are enhanced in droplet residual particles as compared to particles below and above cloud. In-cloud aqueous processing is shown to be a potential driver of this compositional shift in cloud. This implies that aerosol–cloud interactions in the region reduce aerosol hygroscopicity due to the jump in the organic : sulfate ratio in cloud.