Work

Using formvar to capture atmospheric ice crystals and retrieve roughness parameters

Year: 2026

Type: article

Abstract: . Ice crystal roughness is a poorly observed and understood parameter, yet it significantly influences crystal’s scattering properties and consequently impacts radiative transfer in the atmosphere, contributing to uncertainties in weather and climate forecasting. In this study, we introduce a novel approach to obtain high-resolution roughness measurements, building on the traditional formvar method for capturing ice crystals. Ice crystals were grown in the Manchester Ice Cloud Chamber, collected, and subsequently imaged using various techniques, including a scanning optical profilometer, which enabled the identification of roughness features as small as 0.8 µm. This approach provides critical insights into roughness characteristics that are significant for improving radiative transfer models and forecasts.

Source: Atmospheric measurement techniques

DOI: 10.5194/amt-19-2621-2026

Authors: Omer Celebi, Andrew R. D. Smedley, Paul Connolly, Ann R. Webb

Institution: University of Manchester

Language: English

Topic: Atmospheric aerosols and clouds

Subfield: Global and Planetary Change

Field: Environmental Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,585

Funders: Sight Research UK, Natural Environment Research Council