Activation of intact bacteria and bacterial fragments mixed with agar as cloud droplets and ice crystals in cloud chamber experiments

Suski, Kaitlyn J.; Bell, David M.; Hiranuma, Naruki; Möhler, Ottmar; Imre, Dan; Zelenyuk, Alla

doi:https://doi.org/10.5194/acp-18-17497-2018

Articles | Volume 18, issue 23

https://doi.org/10.5194/acp-18-17497-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Fifth International Workshop on Ice Nucleation (FIN) (ACP/AMT...

https://doi.org/10.5194/acp-18-17497-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 23

Research article

|

11 Dec 2018

Research article |

| 11 Dec 2018

Activation of intact bacteria and bacterial fragments mixed with agar as cloud droplets and ice crystals in cloud chamber experiments

Kaitlyn J. Suski, David M. Bell, Naruki Hiranuma, Ottmar Möhler, Dan Imre, and Alla Zelenyuk

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https://doi.org/10.5194/acp-18-17497-2018-supplement

Data sets

Activation of Intact Bacteria and Bacterial Fragments Mixed with Agar as Cloud Droplets and Ice Crystals in Cloud Chamber Experiments K. J. Suski https://dtn2.pnl.gov/data/release/2018_Suski_et_al_Bacteria_Paper/

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Short summary

This work investigates the cloud condensation nuclei and ice nucleation activity of bacteria using cloud chamber data and a single particle mass spectrometer. The size and chemical composition of the cloud residuals show that bacterial fragments mixed with agar growth media activate preferentially over intact bacteria cells as cloud condensation nuclei. Intact bacteria cells do not make it into cloud droplets; they thus cannot serve as immersion-mode ice nucleating particles.