Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session R26: Geophysical Fluid Dynamics: Climate
1:50 PM–3:34 PM,
Monday, November 20, 2023
Room: 151A
Chair: Justin Burton, Emory University, Department of Physics
Abstract: R26.00008 : Cloud droplet distribution in shallow cumulus clouds: CloudKite measurements from EUREC4A
3:21 PM–3:34 PM
Presenter:
Birte Thiede
(Max Planck Institute for Dynamics and Self-Organization)
Authors:
Birte Thiede
(Max Planck Institute for Dynamics and Self-Organization)
Oliver Schlenczek
(Max Planck Institute for Dynamics and Self-Organization)
Freja Nordsiek
(Max Planck Institute for Dynamics and Self-Organization)
Eberhard Bodenschatz
(Max Planck Institute for Dynamics and Self-Organization)
Gholamhossein Bagheri
(Max Planck Institute for Dynamics and Self-Organization)
We collected in-situ data in shallow cumulus clouds over the Atlantic Ocean near Barbados during the EUREC4A field campaign using the tethered aerostat Max Planck CloudKite.
Our onboard instruments include an in-line holography setup as well as a particle image velocimetry setup to measure size, location, and velocity of cloud droplets.
The high acquisition rates of these imaging instruments combined with the CloudKite's low airspeed result in unprecedented resolution for such in-situ cloud droplet measurements.
Overall, we found a high variability at sub-meter scale in droplet size distribution and concentration both at the depth of a cloud and near the cloud edge.
We also observe clustering of cloud droplets and centimeter-sized void regions.
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