Preprints
https://doi.org/10.5194/egusphere-2023-3019
https://doi.org/10.5194/egusphere-2023-3019
10 Jan 2024
 | 10 Jan 2024

A Light-Weight Holographic Imager for Cloud Microphysical Studies from an Untethered Balloon

Thomas Edward Chambers, Iain Murray Reid, and Murray Hamilton

Abstract. We describe the construction and testing of an in situ cloud particle imager based on digital holography. The instrument was designed to be low cost and light weight for vertical profiling of clouds with an untethered weather balloon. This capability is intended to address the lack of in situ cloud microphysical observations that are required for improving the understanding of cloud processes, calibration of climate and weather models, and validation of remote sensing observation methods.

From a balloon sounding through multiple bands of cloud, we show that we can retrieve shape information and size distributions of the cloud particles as a function of altitude. Microphysical retrievals from an imaging satellite are compared to these in situ observations and significant differences are identified, consistent with those identified in prior evaluation campaigns.

Thomas Edward Chambers, Iain Murray Reid, and Murray Hamilton

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-3019', Anonymous Referee #1, 27 Jan 2024
  • RC2: 'Comment on egusphere-2023-3019', Anonymous Referee #2, 13 Feb 2024
Thomas Edward Chambers, Iain Murray Reid, and Murray Hamilton

Data sets

Data from the Untethered Balloon Launch of a Holographic Imager Into Cloud Near Adelaide, South Australia in August 2020 Thomas Edward Chambers, Iain Murray Reid, and Murray Hamilton https://doi.org/10.5281/zenodo.10297799

Thomas Edward Chambers, Iain Murray Reid, and Murray Hamilton

Viewed

Total article views: 240 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
179 51 10 240 4 2
  • HTML: 179
  • PDF: 51
  • XML: 10
  • Total: 240
  • BibTeX: 4
  • EndNote: 2
Views and downloads (calculated since 10 Jan 2024)
Cumulative views and downloads (calculated since 10 Jan 2024)

Viewed (geographical distribution)

Total article views: 238 (including HTML, PDF, and XML) Thereof 238 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 26 Feb 2024
Download
Short summary
Clouds have been identified as the largest source of uncertainty in climate modelling. We report an untethered balloon launch of a holographic imager through clouds. This is the first time a holographic imager has been deployed in this way, enabled by the light weight and low cost of the imager. This work opens the potential to significantly increase the availability of cloud microphysical measurements, as required for the calibration and validation of climate models and remote sensing methods.