Putting the spotlight on small cloud droplets with SmHOLIMO –  a new holographic imager for in situ measurements of clouds

Fuchs, Christopher; Ramelli, Fabiola; Schweizer, David; Lohmann, Ulrike; Henneberger, Jan

doi:https://doi.org/10.5194/amt-18-2969-2025

Articles | Volume 18, issue 13

https://doi.org/10.5194/amt-18-2969-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-18-2969-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 13

Research article

|

08 Jul 2025

Research article |

| 08 Jul 2025

Putting the spotlight on small cloud droplets with SmHOLIMO – a new holographic imager for in situ measurements of clouds

Christopher Fuchs, Fabiola Ramelli, David Schweizer, Ulrike Lohmann, and Jan Henneberger

Data sets

Data for the publication "Putting the spotlight on small cloud droplets with SmHOLIMO - A new holographic imager for in situ measurements of clouds" Christopher Fuchs, Fabiola Ramelli, David Schweizer, Ulrike Lohmann, Jan Henneberger https://doi.org/10.5281/zenodo.15209325

Model code and software

Scripts for figures in publication "Putting the spotlight on small cloud droplets with SmHOLIMO - A new holographic imager for in situ measurements of clouds" Christopher Fuchs, Fabiola Ramelli, David Schweizer, Ulrike Lohmann, Jan Henneberger https://doi.org/10.5281/zenodo.15209223

Short summary

We present a new instrument based on digital in-line holography (SmHOLIMO) for in situ cloud measurements. SmHOLIMO is designed to specifically measure small cloud droplets with diameters > 3.7 μm. This way we retrieve accurate cloud droplet size distributions, which are crucial to understand the evolution and governing microphysical processes of a cloud. Results of a field study are compared to co-located measurements of a second holographic imager, microwave radiometer, and cloud radar.